GB1054054A - - Google Patents

Abstract

1,054,054. fluid analysing apparatus. HONEYWELL Inc. June 4, 1963 [June 1, 1962], No. 22204/63. Headings G1A and G1N A fluid analysing apparatus comprises a tank including a means responsive to a physical characteristic of the fluid within the tank, the tank being positioned within and spaced from the walls of a container the capacity of which is such as to provide a space many times greater than the volume of the tank, and fluid passageways being provided so that a sample may pass through the base of the tank through an opening in the upper wall, and out through a drain in the upper wall of the container. The invention is applied to an apparatus for testing river water in which samples may be drawn from predetermined depths by a pump 44, Fig. 1 (not shown), and wherein the container holds six tanks 102, 104, 106, 108, 110, 112 each including a probe, the respective probes measuring temperature, turbidity, pH, chloride ion conductivity, and dissolved oxygen content which are recorded on a single chart together with sunlight intensity on the river which is measured by a separate transducer 135. The pump 44 is suspended from a shaft 30 mounted on a float 12 and apertures are provided in the shaft supporting bracket wherein pins may be located to fix the pump at a desired angle. A proportion of the pumped water is fed back to the river through a manually adjustable valve 60. The fluid is fed to the tanks through a manifold 74 and the inlet ends within thetank may be screwed for the provision of nozzles such as 124, Fig. 3, so that the initial spray may be directed on the probes for cleaning purposes. Sand filters may be incorporated in the manifold. Apertures 150, 152 provide for the egress of water and the size of the space to which the water flows ensures a good representative sample in the tank. An overflow 174 is provided in the outer container, and a drain 178 controlled by a solenoid operated valve 180 is provided for cleaning purposes. The control circuit provides for samples to be bottled in the event of characteristics exceeding predetermined limits. The turbidity meter comprises a light 280, Fig. 3 (not shown), directing light on to the surface of the tank sample through a lens 282 the reflected light from the water being detected by one or more photo-cells 288 around an aperture 284. An analogue to digital converter may precede the recorder. The process is controlled by cam operated mercury switches in response to a timer, and the measuring is initiated by a floating level switch in the container.