Abstract: An ultraviolet fluid disinfection system including:one or more fluid flow passageways,one or more modules located in each passageway, each module having one or more rows of ultraviolet lamps, positioned to irradiate the fluid with ultraviolet,a lamp control assembly connected to each row of lamps to monitor data from and control operation of the lamps,a power distributor connected to the lamp control assemblies,a data interface connected to the lamp control assemblies, anda data control assemblies connected to the data interface and to the lamp control assemblies to read data from the lamp control assemblies and communicate with the data interface.

Abstract: An immersible and portable module for irradiating waste fluids and capable of in situ self cleaning including a first header capable of receiving and maintaining in position a multiplicity of ultraviolet light producing lamps.The module includes a second header capable of receiving and maintaining in position said multiplicity of lamps and having an opening to receive cleaning fluids wherein the multiplicity of lamps are connected to the headers. The second header has a multiplicity of cleaning fluid exit holes proximate the lamps to permit the cleaning fluids to flow into the opening and outwardly from the holes and into contact with the lamps.

Abstract: A clamp for positioning a photocell adjacent to an ultraviolet light source including: a housing sized and shaped to receive at least a portion of the photocell; a seal positioned about conductive members extending from the photocell and out of the housing against penetration of liquids into the housing; another seal connected to the housing and having an access opening to a detection end of the photocell; and spaced apart opposed arms extending from the housing and having portions sized and shaped to firmly receive an outer surface of the ultraviolet light source, wherein the detection end of the photocell is positioned at a predetermined distance from the light source.

Abstract: A submersible photocell for detecting ultraviolet light in disinfection apparatus including a quartz jacket capable of transmitting ultraviolet light and a fluorescent material sensitive to ultraviolet light at a wavelength of about 253.7 nm and which produces an infrared secondary emission having a wavelength of about 730-735 nm upon absorption of ultraviolet light. The photocell also includes a photoconductor sensitive to the secondary emission light, is located adjacent the fluorescent material and is capable of varying conductance of electricity upon absorbing light having a wavelength of about 730-735 nm from the infrared secondary emission. The photocell further includes electrically conductive wiring connected to the photoconductor and extending outwardly of the jacket at its remote end.

Abstract: There is disclosed methods and apparatus for proving fluid meters, particularly gas meters of the positive displacement, diaphragm-operated type in which the number of cycles of operations of the valve mechanism of the meter is used as a factor in proving the accuracy of the meter, the number of said cycles being determined by sensing a series of pressure waveforms in the test gas entering and leaving the diaphragm chambers of the meter, which waveforms are characteristic of the particular meter being tested and occur in each cycle and reoccuring cycle of operation of the meter when operating, detecting a characteristic waveform in each series of waveforms, amplifying and shaping the characteristic waveform and counting a predetermined number of cycles of said waveforms and comparing the volume of test gas which has passed through the meter as measured by a test bell with the amount that should have passed during that predetermined number of cycles of operations of the meter.