GB2253703A - Electronic liquid level sensing device - Google Patents
Electronic liquid level sensing device Download PDFInfo
- Publication number
- GB2253703A GB2253703A GB9105429A GB9105429A GB2253703A GB 2253703 A GB2253703 A GB 2253703A GB 9105429 A GB9105429 A GB 9105429A GB 9105429 A GB9105429 A GB 9105429A GB 2253703 A GB2253703 A GB 2253703A
- Authority
- GB
- United Kingdom
- Prior art keywords
- water
- level
- transistorised
- level device
- electronic
- 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- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
- G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
- G01F23/243—Schematic arrangements of probes combined with measuring circuits
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
An electronic device for detecting the level of water or other conductive liquids in tanks comprises a probe having ordinary wires or rods (eg of copper). When the rods or wires are touched by the liquid, a circuit is completed and a buzzer operated. The circuit components other than the probe may be situated at a distance from the point of detection. Two probes may be used to enable high and low level detection. <IMAGE>
Description
PANEL A
ELECTRONIC LEVEL DEVICE
TECHNICAL FIELD:
THIS INVENTION PERTAINS TO WATER LEVEL MONITORING AND ALARM
APPLICATIONS IN WATER TANKS AND RESERVOIRS
BACKGROUND:
LEVEL ALARM AND CONTROL OF WATER TANKS USED IN RESIDENTIAL
BUILDINGS , AND IN HOUSES OR IN UNDERGROUND RESERVOIRS ATTATCHED TO
RESIDENTIAL BUILDINGS HAVE BEEN DEPENDANT ON MECHANICAL FLOATER
DRIVING CONTACTS OPERATING WITH LETHAL ELECTRICAL SUPPLIES OF 240
VOLTS AC
THESE DEVICES ARE SUBJECT TO MECHANICAL PROBLEMS , JAMMING IN
THEIR HINGES , SUFFER OF FREQUENT ELECTRICAL CONTACT PROBLEMS AND ARE
DANGEROUS TO HUMAN BEING DUE TO THEIR HIGH VOLTAGE .ALSO THESE
DEVICES NEED SPECIAL MOUNTING ARRANGEMENTS WHICH MAKES THE ENTIRE
SOLUTION EXPENSIVE AND INFLEXIBLE TECHNICAL FEATURES:
ACCORDING TO THIS INVENTION, THE NEW ELECTRONIC LEVEL DEVICE CAN
BE USED ON WATER TANKS IN RESIDENTIAL BUILDINGS AS WELL IN
INDUSTRIAL APPLICATIONS OF WASTE WATER AND SEWER WATER SYSTEMS
EASILY . THIS DEVICE DOES NOT NEED SPECIAL MOUNTING ARRANGEMENTS AND
SO CAN BE INSTALLED EASILY IN ANY WATER TANK/RESERVOIRS BY USING
TWO COPPER RODS OR WIRES INSERTED IN THE TANK THROUGH TOP OR SIDE
OPENING TO THE LEVEL REQUIRED . OTHER CONDUCTIVE METALS CAN BE USED
INSTEAD OF COPPER SUCH AS STAINLESS STEEL OR ALUMINIUM OR JUST BY
DROPPING TWO COPPER WIRES IN THE TANK TO THE LEVEL REQUIRED TO
INITIATE THE ALARM AT
THIS DEVICE USES LOW VOLTAGE SUPPLY SO IT IS NOT HARMFUL TO
USERS .THE POWER CONSUMPTION OF THIS CIRCUIT IS VERY LOW AND CAN BE
SUPPLIED EITHER FROM A 9 VOLT BATTERY OR FROM AN AC POWER SUPPLY WITH
DC VOLTAGE ADAPTOR PRODUCING 9 TO 12 VOLTS DC . THIS CIRCUIT WAS
TESTED FOR MORE THAN 10 YEARS SUCCESSFULLY IN RESIDENTIAL BUILDINGS
AND INDUSTRIAL APPLICATIONS WITHOUT A FAILURE SO IT IS CONSIDERED
VERY RELIABLE
EXAMPLE:
FIGURE(3) SHOWS A TYPICAL APPLICATION OF THIS CIRCUIT IN A
RESEDINTIAL BUILDING WHERE THIS CIRCUIT IS USED TO MONITOR AND
CONTROL WATER LEVELS IN WATER TANKS AT THE ROOF OF THE BUILDING AND
IN UNDERGROUND TANKS
FIGURE(4) AND FIGURE(5) SHOW A POSSIBLE SCHEMATIC AND WIRING
DIAGRAM FOR USING THIS DEVICE TO START AND STOP WATER PUMPS USED TO
MAINTAIN WATER LEVELS IN WATER TANKS .ALSO THE SAME DEVICE USED TO
PRODUCE ALARM LEVELS AT A MAIN ALARM PANEL FOR THE BUILDING BESIDE
INDIVIDUAL ALARM PANELS FOR EACH TANK
PANEL B
ELECTRONIC LEVEL DEVICE
REFFERING TO THE CIRCUIT DIAGRAM IN FIGURE(1) , THE LEVEL ALARM
CIRCUITRY COMPRISES OF FEW TRANSISTORS OF TYPE BY107 , FEW LOW
POWER 1/4 WATT RESISTORS AND THREE CAPACITORS WITH THE VALUES GIVEN.
THIS CIRCUIT ACTUATES THE BUZZER OR THE CONTROL RELAY VIA
TRANSISTOR Ql WHEN WATER TOUCHES THE WIRE PROPES INSERTED INSIDE THE
TANK . THE LOW WATER RESISTANCE BETWEEN PROBES , LEADS TO THE NEEDED
BIASING EFFECT OF Q1 TRANSISTOR WHICH IN TURN PERMITS OTHER
TRANSISTORS TO CONDUCT INCLUDING THE FINAL OUTPUT TRANSISOR Q1 WHICH WHEN CONDUCTS DRIVES THE BUZZER OR RELAY
THE POWER SUPPLY OF THE CIRCUITRY COMES FROM 9 VOLTS DC SUPPLY
THE CIRCUITRY CAN BE INSTALLED FARAWAY FROM THE WATER TANK UP TO
A DISTANCE OF 600 FEET
ORDINARY COPPER WIRES OF 1.5mum OR 2.5my2 CAN BE USED BETWEEN THE
CIRCUITRY AND THE LEVEL PROBES INSIDE THE WATER TANK . THIS CIRCUIT
CAN BE USED TO DRIVE A RELAY USED TO START AND STOP WATER PUMPS OR
ANY OTHER EQUIPMENT AS NEEDED IN RESIDENTIAL BUILDINGS OR INDUSTRIAL
APPLICATIONS
Claims (1)
- PANEL C ELECTRONIC LEVEL DEVICE CLAIMS:1- A TRANSISTORISED ELECTRONIC LEVEL DEVICE USING ORDINARY COPPER ROD/WIRE PROBES TO DETECT WATER LEVELS IN WATER TANKS AND RESERVOIRS OR ANY OTHER CONDUCTIVE LIQUIDS IN RESERVOIRS AND GENERATE A CONTACT OUTPUT AND/OR ACOUSTIC ALARM USING A SMALL 9 DC BUZZER AS SHOWN IN THE CIRCUITRY OF FIGURE 12- A TRANSITORISED ELECTRONIC LEVEL DEVICE AS CLAIMED IN CLAIM 1 WHERE IN THE DETECTION OF WATER LEVEL IS ACHIEVED USING TRANSISTOR BIASING PHENOMENA3- A TRANSISTORISED ELECTRONIC LEVEL DEVICE AS CLAIMED IN CLAIM 1 AND 2 WHICH CAN BE INSTALLED FARAWAY FROM WATER TANKS UP TO 600 FEET4- A TRANSISTORISED ELECTRONIC LEVEL DEVICE AS CLAIMED IN CLAIMS 1 , 2 AND 3 WHICH USES ORDINARY COPPER WIRES OR RODS AS PROBES AND CAN BE INSTALLED EASILY IN ANY WATER TANK AND WHERE ALARM LEVEL CAN BE ADJUSTED VERY EASILY WITHOUT SPECIAL RECALIBRATION OR REMOUNTING OF MECHANICAL FLOATERS5- A TRANSISTORISED ELECTRONIC LEVEL DEVICE AS CLAIMED IN CLAIMS 1 ,2 ,3 AND 4 WHERE WATER PUMPS CAN BE STARTED AND STOPPED TO CONTROL WATER LEVEL WITHEN REQUIRED LIMITS USING OUTPUT CONTACTS FROM TWO LEVEL DEVICES , ONE FOR HIGH LEVEL AND ONE FOR LOW LEVEL
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9105429A GB2253703A (en) | 1991-03-14 | 1991-03-14 | Electronic liquid level sensing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9105429A GB2253703A (en) | 1991-03-14 | 1991-03-14 | Electronic liquid level sensing device |
Publications (2)
Publication Number | Publication Date |
---|---|
GB9105429D0 GB9105429D0 (en) | 1991-05-01 |
GB2253703A true GB2253703A (en) | 1992-09-16 |
Family
ID=10691577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9105429A Withdrawn GB2253703A (en) | 1991-03-14 | 1991-03-14 | Electronic liquid level sensing device |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2253703A (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1436787A (en) * | 1972-12-21 | 1976-05-26 | Voll W | Device for detecting the presence of liquids |
US4265262A (en) * | 1979-03-19 | 1981-05-05 | William Hotine | Fluent material level control system |
WO1983002824A1 (en) * | 1982-02-12 | 1983-08-18 | Dranmont Pty Ltd | Fluid level detection and monitoring system |
WO1984002401A1 (en) * | 1982-12-17 | 1984-06-21 | Kevyn Barry Moore | Water level monitor and/or alarm system for bilges |
GB2136965A (en) * | 1983-03-07 | 1984-09-26 | Braude E | Liquid level sensor |
-
1991
- 1991-03-14 GB GB9105429A patent/GB2253703A/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1436787A (en) * | 1972-12-21 | 1976-05-26 | Voll W | Device for detecting the presence of liquids |
US4265262A (en) * | 1979-03-19 | 1981-05-05 | William Hotine | Fluent material level control system |
WO1983002824A1 (en) * | 1982-02-12 | 1983-08-18 | Dranmont Pty Ltd | Fluid level detection and monitoring system |
WO1984002401A1 (en) * | 1982-12-17 | 1984-06-21 | Kevyn Barry Moore | Water level monitor and/or alarm system for bilges |
GB2136965A (en) * | 1983-03-07 | 1984-09-26 | Braude E | Liquid level sensor |
Also Published As
Publication number | Publication date |
---|---|
GB9105429D0 (en) | 1991-05-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |