EP1421356A2 - A sensor unit for measuring pressure and/or temperature in a pipeline - Google Patents

A sensor unit for measuring pressure and/or temperature in a pipeline

Info

Publication number
EP1421356A2
EP1421356A2 EP02755286A EP02755286A EP1421356A2 EP 1421356 A2 EP1421356 A2 EP 1421356A2 EP 02755286 A EP02755286 A EP 02755286A EP 02755286 A EP02755286 A EP 02755286A EP 1421356 A2 EP1421356 A2 EP 1421356A2
Authority
EP
European Patent Office
Prior art keywords
water
sensor unit
pipe section
sensor
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02755286A
Other languages
German (de)
French (fr)
Inventor
Damian Cook
Colin Burnett
Olaf Thomssen
Stefan Fischer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Elmwood Sensors Ltd
Elmwood Sensors Inc
Original Assignee
Elmwood Sensors Ltd
Elmwood Sensors Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB0128739A external-priority patent/GB2382654B/en
Application filed by Elmwood Sensors Ltd, Elmwood Sensors Inc filed Critical Elmwood Sensors Ltd
Publication of EP1421356A2 publication Critical patent/EP1421356A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/0092—Pressure sensor associated with other sensors, e.g. for measuring acceleration or temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/02—Means for indicating or recording specially adapted for thermometers
    • G01K1/04—Scales
    • G01K1/045—Scales temperature indication combined with the indication of another variable
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G01K13/02—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/0007—Fluidic connecting means
    • G01L19/0023—Fluidic connecting means for flowthrough systems having a flexible pressure transmitting element

Definitions

  • the present invention relates to a sensor unit.
  • the present invention relates to a sensor unit for measuring the temperature and/or pressure of hot water flowing out of a domestic installation gas-fired water heater (sometimes called a "boiler”) .
  • a domestic installation gas-fired water heater sometimes called a "boiler”
  • Water heaters currently use water pressure gauges and pressure switches for measuring small changes in air pressure and other water heaters used just temperature sensors (for example one at the inlet and one at the outlet and a safety bimetal thermostat) .
  • New models of water heaters make use of a signal output by a pressure sensor to ensure more efficient functioning of the heater. Also temperature sensors sensing the temperature of water output by water heaters are used.
  • a sensor unit connectable in a water pipeline of a water system of a domestic water heater, the sensor unit comprising: a housing; and a pressure sensor located in the housing and operable to provide an electrical signal indicative of water pressure; wherein: the housing has a communication aperture in a surface thereof which allows communication of water pressure to the pressure sensor located in the housing; and the housing comprises a pipe section connectable in the water pipeline as part of the pipeline so that water flowing in the water pipeline flows through the pipe section; and the communication aperture is formed in an inwardly facing surface of the pipe section.
  • a sensor unit connectable in a water pipeline of a water system of domestic water heater, the sensor unit comprising: a housing; and a temperature sensor located in the housing and operable to provide an electrical signal indicative of water temperature; wherein: the housing has an arm which when the sensor unit is connected in the water pipeline extends towards a centre of a water flow and which has located therein at least a part of the temperature sensor; the housing comprises a pipe section connectable in the water pipeline as part of the pipeline so that water flowing in the pipeline flows through the pipe section; and the arm is an integral part of the pipe section which extends inwardly towards the centre of the pipe section.
  • the present invention provides in a third aspect a sensor unit connectable in a water pipeline of a water system of a domestic water heater, the sensor unit comprising: a housing; a pressure sensor located in the housing and operable to provide an electrical output signal indicative of water pressure; and a temperature sensor located in the housing and operable to provide an electrical output signal indicative of water temperature; wherein: the housing has a communication aperture in a surface thereof which allows communication of water pressure to the pressure sensor located in the housing; and the housing has an arm which when the sensor unit is connected in the water pipeline extends towards the centre of a water flow and which has located therein at least a part of the temperature sensor; the housing comprises a pipe section connectable in the water pipeline as part of the pipeline so that water flowing in the pipeline flows through the pipe section; the communication aperture is formed in an inwardly facing surface of the pipe section; and the arm is an integral part of the pipe section which extends inwardly towards the centre of the pipe section.
  • Figure 1 is a schematic cross-section through a first embodiment of a combined pressure and temperature sensor unit according to the present invention
  • Figure 2 is a schematic perspective exterior view of the first embodiment of sensor unit
  • Figure 3 is a schematic exterior view of a second embodiment of combined pressure and temperature sensor unit according to the present invention.
  • the unit 10 is an in-line unit connected in a water pipeline of a water system comprising a domestic water heater.
  • the unit 10 can be connected in an outlet water pipe leading from a domestic water heater, as will be described later.
  • the unit 10 has a housing comprising a pipe section 11 and a cover 12. Located in the unit 10 there are a pressure sensor 13 and a temperature sensor 14. The sensors 13 and 14 are located in a cavity defined between the pipe section 11 and the cover 12. The sensors 13 and 14 are embedded in the unit 10 and are integral parts thereof.
  • the pipe section 11 is L-shaped.
  • the sensors 13 and 14 are located at an elbow part of the pipe section.
  • a boss 15 extends inwardly into the flow channel at the elbow and also an arm 16 extends inwardly into the flow channel, to a greater degree than the boss 15.
  • the boss 15 and the arm 16 are both integral features of the moulded pipe section.
  • An aperture 17 is provided in the boss 15 and this allows communication of the water in the pipe section 11 with the cavity housing the pressure sensor 13.
  • the arm 16 provides a shroud for the temperature sensor 14.
  • the temperature sensor 14 is shrouded by an integral feature of the pipe section 11 so that it senses conditions of the fluid flow without contacting the fluid flow. This is advantageous since the fluid tends to contain corrosive elements.
  • An O-ring seal 18 is located in an external groove on the exterior of the pressure sensor 13 and acts between the pressure sensor 13 and the interior surface of the boss 15 to provide a seal preventing escape of water past the pressure sensor 13.
  • the operation of the pressure sensor 13 is described in another patent application of the applicant.
  • the pressure sensor 13 has a void 19.
  • a pressure sensing element 20 is located in he void and is abutted by a flexible element 21 which is exposed to the water pressure.
  • the pressure sensor is located so as not to be directly placed in the fluid flow because then it would not give an accurate reading.
  • the water heaters common today often operate in a vacuum.
  • Traditional pressure sensors could not sense pressure below 1 bar. By sensing pressure using fluid removed from the fluid flow, the sensor is capable of accurately sensing pressure below 1 bar.
  • the unit 10 is manufactured by fitting the pressure sensor 13 and the temperature sensor 14 in sockets defined in the moulded pipe section and then the cover 12 is mechanically fixed in place.
  • the location of the temperature sensor at the elbow provides the temperature sensor 14 with a fast response rate to changes in water temperature since the flow is turbulent in the elbow region.
  • the temperature sensor 14 took less than 5 seconds to change 63% of the total resistance change arising between a first and second temperature.
  • the pressure sensor 13 also took less than 10 msec to respond to a change between two pressure states. Tests also showed that the pressure sensor 13 could read pressure to below 1 bar and had an accuracy of better than 4%, typically 2%.
  • the sensor will be calibrated to read pressure of a typical domestic boiler in a range of 0.3 bar to 3 bar.
  • the normal operating temperature range of the sensor unit will be 5 - 110°C.
  • the sensor unit 10 supplies two signals to a boiler management system, 'one for pressure and one for temperature.
  • the pressure output signal is an analogue voltage signal typically in the range 0.5V to 4.5VDC over the measured pressure range.
  • the extremes of the possible voltage output range e.g. 0-0.5V and 4.5-5DV, give an indication of an error.
  • the temperature sensor provides a resistance variable with temperature and the input supply voltage is typically 5VDC and the amount typically varies to a maximum of 250mA.
  • the pipe section 11 is of a size and cross- section which matches the pipework of the pipeline in which it is inserted.
  • the pipe section 11 is designed to be easily fitted to the pipes of the surrounding pipeline. In the illustrated embodiment this is achieved by the provision of four pairs of aligned apertures, two pairs of which are shown at 22,23 and 24, 25.
  • Figure 2 it can be seen that the sensor unit is connected to two adjacent pipes in a water pipeline of a water system.
  • a collar 26 is shown on a pipe 27 and abutting against this is a resilient seal 28.
  • the L-shaped pipe section 11 is push fitted over the end of the pipe 27.
  • a U-shaped clip is used to secure the connection.
  • a U-shaped clip 29 is shown in Figure 2 in position securing the pipe section 11 to a pipe 30. Each arm of the U-shaped clip 29 is inserted through a pair of aligned apertures (e.g. 24, 25) in the pipe section 11.
  • the embodiment described above comprises an L- shaped pipe section 11.
  • a straight pipe section could be used as shown at 31 in a second embodiment of unit 34 shown in Figure 3.
  • a U- shaped clip 32 is used to secure the pipe section 31 to a pipe 33.
  • the sensor units 10 and 34 are described at connected in an outlet pipeline of a domestic water heater to measure outlet pressure and temperature, they may be used for other functions within the water heater.
  • the pipe section 11 is designed to be a section of duct work.
  • the pressure sensor and the temperature sensor are an integral part of a modular unit connectable in and disconnectable from a duct in the same way as a conventional duct or pipe section.
  • the sensor units 10 and 34 will be manufactured as completed modular units in an assembly plant and then transported to where they are required. Each sensor unit, with pre-installed sensors, will be installed in a pipeline by connecting the pipe section at each end to sections of pipes in the pipeline.
  • the present invention also is applicable to units comprising just a temperature sensor or just a pressure sensor, since some water heaters would need only a temperature signal or only a pressure signal.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

The present invention provides a sensor unit (10) connectable in a water pipeline of a water system comprising a domestic water heater. The sensor unit comprises a housing (11, 12), a pressure sensor (13) located in the housing (11, 12) and operable to provide an electrical signal indicative of water pressure, and a temperature sensor (14) located in the housing (11, 12) and operable to provide an electrical signal indicative of water temperature. The housing (11, 12) has a communication aperture (17) in a surface thereof which allows communication of water pressure to the pressure sensor (13) located in the housing (11, 12). The housing (11, 12) has an arm (16) which when the sensor unit (10) is connected in the water pipeline extends towards the centre of the water flow and which has located therein at least a part of the temperature sensor (14).

Description

A SENSOR UNIT
The present invention relates to a sensor unit.
In particular, the present invention relates to a sensor unit for measuring the temperature and/or pressure of hot water flowing out of a domestic installation gas-fired water heater (sometimes called a "boiler") .
Use of water pressure sensors to measure the output of a domestic water heater is relatively new. Water heaters currently use water pressure gauges and pressure switches for measuring small changes in air pressure and other water heaters used just temperature sensors (for example one at the inlet and one at the outlet and a safety bimetal thermostat) . New models of water heaters make use of a signal output by a pressure sensor to ensure more efficient functioning of the heater. Also temperature sensors sensing the temperature of water output by water heaters are used.
It is a technical problem to install pressure sensors and/or temperature sensors in a pipeline leading to and/or from a water heater. Often this involves time-consuming drilling and fixing operations on site with an operator having to drill into pre- assembled pipework and then fix one or more sensors to the pipework.
In a first aspect of the present invention there is provided a sensor unit connectable in a water pipeline of a water system of a domestic water heater, the sensor unit comprising: a housing; and a pressure sensor located in the housing and operable to provide an electrical signal indicative of water pressure; wherein: the housing has a communication aperture in a surface thereof which allows communication of water pressure to the pressure sensor located in the housing; and the housing comprises a pipe section connectable in the water pipeline as part of the pipeline so that water flowing in the water pipeline flows through the pipe section; and the communication aperture is formed in an inwardly facing surface of the pipe section.
In a second aspect of the present invention there is provided a sensor unit connectable in a water pipeline of a water system of domestic water heater, the sensor unit comprising: a housing; and a temperature sensor located in the housing and operable to provide an electrical signal indicative of water temperature; wherein: the housing has an arm which when the sensor unit is connected in the water pipeline extends towards a centre of a water flow and which has located therein at least a part of the temperature sensor; the housing comprises a pipe section connectable in the water pipeline as part of the pipeline so that water flowing in the pipeline flows through the pipe section; and the arm is an integral part of the pipe section which extends inwardly towards the centre of the pipe section. The present invention provides in a third aspect a sensor unit connectable in a water pipeline of a water system of a domestic water heater, the sensor unit comprising: a housing; a pressure sensor located in the housing and operable to provide an electrical output signal indicative of water pressure; and a temperature sensor located in the housing and operable to provide an electrical output signal indicative of water temperature; wherein: the housing has a communication aperture in a surface thereof which allows communication of water pressure to the pressure sensor located in the housing; and the housing has an arm which when the sensor unit is connected in the water pipeline extends towards the centre of a water flow and which has located therein at least a part of the temperature sensor; the housing comprises a pipe section connectable in the water pipeline as part of the pipeline so that water flowing in the pipeline flows through the pipe section; the communication aperture is formed in an inwardly facing surface of the pipe section; and the arm is an integral part of the pipe section which extends inwardly towards the centre of the pipe section.
Preferred embodiments of the present invention will now be described with reference to the accompanying drawings, in which:
Figure 1 is a schematic cross-section through a first embodiment of a combined pressure and temperature sensor unit according to the present invention; Figure 2 is a schematic perspective exterior view of the first embodiment of sensor unit; and
Figure 3 is a schematic exterior view of a second embodiment of combined pressure and temperature sensor unit according to the present invention.
Turning first to Figure 1, there can be seen a combined pressure and temperature sensor unit 10. The unit 10 is an in-line unit connected in a water pipeline of a water system comprising a domestic water heater. For instance, the unit 10 can be connected in an outlet water pipe leading from a domestic water heater, as will be described later.
The unit 10 has a housing comprising a pipe section 11 and a cover 12. Located in the unit 10 there are a pressure sensor 13 and a temperature sensor 14. The sensors 13 and 14 are located in a cavity defined between the pipe section 11 and the cover 12. The sensors 13 and 14 are embedded in the unit 10 and are integral parts thereof.
The pipe section 11 is L-shaped. The sensors 13 and 14 are located at an elbow part of the pipe section. A boss 15 extends inwardly into the flow channel at the elbow and also an arm 16 extends inwardly into the flow channel, to a greater degree than the boss 15. The boss 15 and the arm 16 are both integral features of the moulded pipe section. An aperture 17 is provided in the boss 15 and this allows communication of the water in the pipe section 11 with the cavity housing the pressure sensor 13. The arm 16 provides a shroud for the temperature sensor 14.
The temperature sensor 14 is shrouded by an integral feature of the pipe section 11 so that it senses conditions of the fluid flow without contacting the fluid flow. This is advantageous since the fluid tends to contain corrosive elements.
An O-ring seal 18 is located in an external groove on the exterior of the pressure sensor 13 and acts between the pressure sensor 13 and the interior surface of the boss 15 to provide a seal preventing escape of water past the pressure sensor 13. The operation of the pressure sensor 13 is described in another patent application of the applicant. The pressure sensor 13 has a void 19. A pressure sensing element 20 is located in he void and is abutted by a flexible element 21 which is exposed to the water pressure.
The pressure sensor is located so as not to be directly placed in the fluid flow because then it would not give an accurate reading. The water heaters common today often operate in a vacuum. Traditional pressure sensors could not sense pressure below 1 bar. By sensing pressure using fluid removed from the fluid flow, the sensor is capable of accurately sensing pressure below 1 bar.
The unit 10 is manufactured by fitting the pressure sensor 13 and the temperature sensor 14 in sockets defined in the moulded pipe section and then the cover 12 is mechanically fixed in place.
The location of the temperature sensor at the elbow provides the temperature sensor 14 with a fast response rate to changes in water temperature since the flow is turbulent in the elbow region. In tests the temperature sensor 14 took less than 5 seconds to change 63% of the total resistance change arising between a first and second temperature. The pressure sensor 13 also took less than 10 msec to respond to a change between two pressure states. Tests also showed that the pressure sensor 13 could read pressure to below 1 bar and had an accuracy of better than 4%, typically 2%. The sensor will be calibrated to read pressure of a typical domestic boiler in a range of 0.3 bar to 3 bar. The normal operating temperature range of the sensor unit will be 5 - 110°C.
The sensor unit 10 supplies two signals to a boiler management system, 'one for pressure and one for temperature. The pressure output signal is an analogue voltage signal typically in the range 0.5V to 4.5VDC over the measured pressure range. The extremes of the possible voltage output range e.g. 0-0.5V and 4.5-5DV, give an indication of an error. The temperature sensor provides a resistance variable with temperature and the input supply voltage is typically 5VDC and the amount typically varies to a maximum of 250mA.
The pipe section 11 is of a size and cross- section which matches the pipework of the pipeline in which it is inserted. The pipe section 11 is designed to be easily fitted to the pipes of the surrounding pipeline. In the illustrated embodiment this is achieved by the provision of four pairs of aligned apertures, two pairs of which are shown at 22,23 and 24, 25. In Figure 2 it can be seen that the sensor unit is connected to two adjacent pipes in a water pipeline of a water system. A collar 26 is shown on a pipe 27 and abutting against this is a resilient seal 28. The L-shaped pipe section 11 is push fitted over the end of the pipe 27. Then a U-shaped clip is used to secure the connection. A U-shaped clip 29 is shown in Figure 2 in position securing the pipe section 11 to a pipe 30. Each arm of the U-shaped clip 29 is inserted through a pair of aligned apertures (e.g. 24, 25) in the pipe section 11.
The embodiment described above comprises an L- shaped pipe section 11. However, a straight pipe section could be used as shown at 31 in a second embodiment of unit 34 shown in Figure 3. Again, a U- shaped clip 32 is used to secure the pipe section 31 to a pipe 33.
Whilst clips are used above to secure units 10 and 34 in an in-line construction in a pipeline, other means of attachment could be used, e.g. screwthreads could be provided on the interior surface of a pipe section or of a sensor unit and matching screw threads on exterior surfaces of pipes to which the sensor unit is connected.
Whilst above the sensor units 10 and 34 are described at connected in an outlet pipeline of a domestic water heater to measure outlet pressure and temperature, they may be used for other functions within the water heater.
The pipe section 11 is designed to be a section of duct work. The pressure sensor and the temperature sensor are an integral part of a modular unit connectable in and disconnectable from a duct in the same way as a conventional duct or pipe section. The sensor units 10 and 34 will be manufactured as completed modular units in an assembly plant and then transported to where they are required. Each sensor unit, with pre-installed sensors, will be installed in a pipeline by connecting the pipe section at each end to sections of pipes in the pipeline.
Whilst above the sensor units 10 and 34 described are combined pressure and temperature sensor units, the present invention also is applicable to units comprising just a temperature sensor or just a pressure sensor, since some water heaters would need only a temperature signal or only a pressure signal.

Claims

1. A sensor unit connectable in a water pipeline of a water system of a domestic water heater, the sensor unit comprising: a housing; and a pressure sensor located in the housing and operable to provide an electrical signal indicative of water pressure; wherein: the housing has a communication aperture in a surface thereof which allows communication of water pressure to the pressure sensor located in the housing; and the housing comprises a pipe section connectable in the water pipeline as part of the pipeline so that water flowing in the water pipeline flows through the pipe section; and the communication aperture is formed in an inwardly facing surface of the pipe section.
2. A sensor unit connectable in a water pipeline of a water system of domestic water heater, the sensor unit comprising: a housing; and a temperature sensor located in the housing and operable to provide an electrical signal indicative of water temperature; wherein: the housing has an arm which when the sensor unit is connected in the water pipeline extends towards a centre of a water flow and which has located therein at least a part of the temperature sensor; the housing comprises a pipe section connectable in the water pipeline as part of the pipeline so that water flowing in the pipeline flows through the pipe section; and the arm is an integral part of the pipe section which extends inwardly towards the centre of the pipe section.
3. A sensor unit connectable in a water pipeline of a water system of a domestic water heater, the sensor unit comprising: a housing; a pressure sensor located in the housing and operable to provide an electrical signal indicative of water pressure; and a temperature sensor located in the housing and operable to provide an electrical signal indicative of water temperature; wherein: the housing has a communication aperture in a surface thereof which allows communication of water pressure to the pressure sensor located in the housing; the housing has an arm which when the sensor unit is connected in the water pipeline extends towards the centre of a water flow and which has located therein at least a part of the temperature sensor; the housing comprises a pipe section connectable in the water pipeline as part of the pipeline so that water flowing in the pipeline flows through the pipe section; the communication aperture is formed in an inwardly facing surface of the pipe section; and the arm is an integral part of the pipe section which extends inwardly towards the centre of the pipe section.
4. A sensor unit as claimed in any one of claims 1 to 3 wherein each sensor is an integral part of a modular unit connectable in and disconnectable from a pipe or duct in the same way as a conventional pipe section or duct section.
5. A sensor unit as claimed in claim any one of the preceding claims, wherein the pipe section is a straight section of pipe of a size and cross-section which matches the pipework of the water pipeline in which the sensor unit is connectable.
6. A sensor unit as claimed in any one of claims 1 to 4, wherein the pipe section is an L-shaped pipe section of a size and cros's-section which matches the pipework of the water pipeline in which the sensor unit is connectable.
7. A sensor unit as claimed in claim 6 wherein the communication aperture and/or the arm are provided in an elbow part of the L-shaped pipe section.
8. A sensor unit as claimed in claim 7 wherein the communication aperture and/or the arm are provided on the outside interior surface of the elbow part of the L-shaped pipe section.
9. A sensor unit as claimed in any one of the preceding claims which comprises a cover which is attachable on the exterior of the pipe section to define with the pipe section a cavity in which the temperature sensor and/or the pressure sensor is/are located.
10. A sensor unit as claimed in any one of the preceding claims wherein the ends of the pipe section each have two pairs of aligned apertures which can receive two arms of a U-shaped clip.
11. A sensor unit as claimed in any one of the preceding claims wherein the pipe section is a moulded part .
12. A sensor unit as claimed in claim 1 or claim 3 or any claim dependent on claim 1 or claim 3 wherein the electrical signal provided by the pressure sensor is an analogue voltage signal.
13. A sensor unit as claimed in claim 2 or claim 3 or any claim dependent on claim 2 or claim 3, wherein the electrical signal provided by the temperature sensor is a resistance value.
14. A water system comprising a domestic water heater and a water pipeline in which is connected as a section of the pipeline the sensor unit claimed in any one of the preceding claims, the water heater having an electronic controller controlling operation of the heater which uses the output signal of each sensor as a feedback signal.
15. A water system as claimed in claim 14 wherein the sensor unit is connected in an outlet water pipeline leading from the water heater.
16. A method of use of a sensor unit as claimed in any one of the preceding claims which comprises connecting the unit into a water pipeline leading from or to a domestic water heater with the pipe section of the unit functioning as a section of the water pipeline, each sensor being installed in the housing as part of the sensor unit prior to the connection of the sensor unit in the water pipeline.
17. A method of manufacture and use of a sensor unit as claimed in any one of claims 1 to 15 wherein the sensor unit is assembled with each sensor connected therein as an integral part thereof, the assembled unit is transported to a place of use and then the assembled unit is connected into a water pipeline leading to or from a domestic water boiler with the pipe section of the sensor unit functioning as a section of the water pipeline.
EP02755286A 2001-08-31 2002-08-30 A sensor unit for measuring pressure and/or temperature in a pipeline Withdrawn EP1421356A2 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US33880001P 2001-08-31 2001-08-31
US338800P 2001-08-31
GB0128739 2001-11-30
GB0128739A GB2382654B (en) 2001-11-30 2001-11-30 A combined pressure and temperature sensor unit
PCT/GB2002/003984 WO2003021218A2 (en) 2001-08-31 2002-08-30 A sensor unit for measuring pressure and/or temperature in a pipeline

Publications (1)

Publication Number Publication Date
EP1421356A2 true EP1421356A2 (en) 2004-05-26

Family

ID=26246820

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02755286A Withdrawn EP1421356A2 (en) 2001-08-31 2002-08-30 A sensor unit for measuring pressure and/or temperature in a pipeline

Country Status (3)

Country Link
EP (1) EP1421356A2 (en)
AU (1) AU2002321580A1 (en)
WO (1) WO2003021218A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7210346B1 (en) * 2005-12-21 2007-05-01 Honeywell International Inc. Modular sensing apparatus
DE202009002485U1 (en) * 2009-02-23 2009-04-30 Wika Alexander Wiegand Gmbh & Co. Kg Connecting element for capillary tube
US8002315B2 (en) 2009-12-23 2011-08-23 General Electric Corporation Device for measuring fluid properties in caustic environments
CN111006797A (en) * 2019-11-23 2020-04-14 刘素兰 Integrated electronic-grade ultra-clean pressure display and cleaning treatment process thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5070706A (en) * 1990-07-10 1991-12-10 Sundstrand Corporation Superheat sensor with single coupling to fluid line
AT405209B (en) * 1997-07-25 1999-06-25 Harreither Gmbh PLASTIC PIPING PART FOR RECEIVING A THERMAL PROBE
JP3319990B2 (en) * 1997-08-29 2002-09-03 三菱電機株式会社 Pressure sensor device
FR2776768B1 (en) * 1998-03-27 2000-05-05 Ades Technologies DEVICE FOR MEASURING AND CONTROLLING PRESSURE AND TEMPERATURE IN HYDRAULIC INSTALLATIONS
US6075923A (en) * 1999-01-15 2000-06-13 Wu; Ya-Ching Self-compensatory water heater sensitively responsive to temperature variations
JP3494594B2 (en) * 1999-08-05 2004-02-09 忠弘 大見 Pressure detector mounting structure

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03021218A3 *

Also Published As

Publication number Publication date
WO2003021218A3 (en) 2003-08-14
WO2003021218A2 (en) 2003-03-13
AU2002321580A1 (en) 2003-03-18

Similar Documents

Publication Publication Date Title
US7624632B1 (en) Constant-temperature-difference flow sensor, and integrated flow, temperature, and pressure sensor
US5904292A (en) Modulating fluid control device
WO2009082447A1 (en) Diagnostics for mass flow control
EP2972118A1 (en) Flowmeter primary element with sensors
RU2168754C2 (en) Flow control valves
EP1421356A2 (en) A sensor unit for measuring pressure and/or temperature in a pipeline
RU2293922C2 (en) Heating arrangement
KR20170139524A (en) Apparatus and method for mixing combustible gas and combustion air, hot water plant equipped therewith, corresponding thermal mass flow sensor, and method for measuring mass flow rate of gas flow
WO2011109378A1 (en) Fluid flow meter
GB2382654A (en) A combined pressure and temperature sensor unit
EP0957348A1 (en) Sensor
US20210088230A1 (en) One-pipe hydronic heating control device
JP3273862B2 (en) Flowmeter
US11703408B1 (en) Versatilely mountable pressure sensing apparatus, system, and/or method
Duda Selecting and Specifying Pipe Flow Meters.
KR100813141B1 (en) Mass Flow Controller valve nozzle fixing structure
KR0125883Y1 (en) Flowmeter control device
US20090101309A1 (en) Radiator connector fitting
US20050188761A1 (en) Device for detecting the flow of a fluid
JP2024014020A (en) Thermal flow meter, and method for manufacturing thermal flow meter
JP2001317976A (en) Flow rate measuring apparatus
CN117870150A (en) Be applied to car as a house water heater's integral type water joint
KR200311504Y1 (en) A thermo flowmeter
JP3412940B2 (en) Microcomputer meter
CZ31889U1 (en) A device for heat exchanger control in a single-pipe heating network

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20040227

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17Q First examination report despatched

Effective date: 20091110

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20100302