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5014541 Continuous air monitoring apparatus and method
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New Patents 5014541
CONTINUOUS AIR MONITORING APPARATUS AND METHOD Gary D Sides, Marion Cates assigned to CMS Research Corporation A continuous air monitoring apparatus utilizes a solid sorbent preconcentrator to concentrate airborne sorbent compounds for gas chromatographic analysis. Direct connection between the preconcentrator and gas chromatographic column allows direct desorption of the compounds into the column with minimal dead space. Temperature control on the column allows sharp chromatographic peaks to be attained without cryogenic focussing.
5015385 PROCESS FOR PROMOTION MICROBIAL CONSUMPTION WASTE WATER FATS
OF OF
spray booth tank. The water level sensor may control the water level in the tank or it may be used to maintain a relatively constant outflow of water from the tank through a vertically movable weir. The weir is moved in response to changes in the liquid level detected by the sensor which includes an electronic signal sensor capable of detecting a level of a liquid relative thereto. The sensor is mounted in an elongated housing that has its lower end disposed in the liquid in the reservoir. The upper end of the housing is vented to the atmosphere to equalize the pressure between the interior thereof and the atmosphere ambient the housing. A flexible diaphragm is secured to the housing so as to seal the open lower end, and a substantially pure test liquid is held within the housing isolated from the liquid in the reservoir. The flexible diaphragm constricts or expands in response to changing liquid levels in the reservoir so that the level of the test liquid stays substantially the same as that of the level of the liquid in the reservoir. The electronic sensor measures the position of the test liquid and sends an appropriate signal to a control system that actuates the weir to raise or lower it in response to changing liquid levels in the reservoir.
Klaus Becker, Hamburg, Federal Republic Of Germany assigned to BTC Biotechnik International GmbH The composition of stable microbial mixed biocenoses can be controlled by the addition of growth factors and/or inhibitory substances, optionally together with certain nutrients. It is possible in this manner to suppress, e.g. the undesirable formation of bulking sludge in sewage treatment plants or to improve the digestion of food or fodder containing biopolymers in the intestine or rumen.
5015393 AUTOMATICALLY ADJUSTABLE WEIR AND ENVIRONMENTALLY PROTECTED SENSOR FOR A FLOATING SLUDGE REMOVAL SYSTEM Frederick Russell, Brandon Russell assigned to Protectaire Systems Co A liquid level sensor for occluded water is provided to detect the surface water !level as in a
5015995 FLUID LEVEL MONITOR Trevor J Holroyd, Derby, United Kingdom assigned to Stresswave Technology Limited A fluid level monitor for monitoring the fluid level in a tank comprises a first pair of transducers arranged in a vertically upper horizontal plane and a second pair of transducers arranged in a vertically lower horizontal plane. Pulse generators send electrical pulses to the transmitter transducers which transmit stress waves into the wall of the tank. The stress waves propagating peripherally are detected by the receiver transducers and processors analyze the amplitude of the detected stress waves to determine if the fluid is present or absent at the upper and lower horizontal planes. The pulse generators are arranged to send pulses out of phase so that stress waves propagating axially can be detected to determine alterations of the fluid level between the upper and lower horizontal planes. The processors may be arranged to operate alarms or to operate valves to control the fluid level in the tank.
New Patents 5014541
CONTINUOUS AIR MONITORING APPARATUS AND METHOD Gary D Sides, Marion Cates assigned to CMS Research Corporation A continuous air monitoring apparatus utilizes a solid sorbent preconcentrator to concentrate airborne sorbent compounds for gas chromatographic analysis. Direct connection between the preconcentrator and gas chromatographic column allows direct desorption of the compounds into the column with minimal dead space. Temperature control on the column allows sharp chromatographic peaks to be attained without cryogenic focussing.
5015385 PROCESS FOR PROMOTION MICROBIAL CONSUMPTION WASTE WATER FATS
OF OF
spray booth tank. The water level sensor may control the water level in the tank or it may be used to maintain a relatively constant outflow of water from the tank through a vertically movable weir. The weir is moved in response to changes in the liquid level detected by the sensor which includes an electronic signal sensor capable of detecting a level of a liquid relative thereto. The sensor is mounted in an elongated housing that has its lower end disposed in the liquid in the reservoir. The upper end of the housing is vented to the atmosphere to equalize the pressure between the interior thereof and the atmosphere ambient the housing. A flexible diaphragm is secured to the housing so as to seal the open lower end, and a substantially pure test liquid is held within the housing isolated from the liquid in the reservoir. The flexible diaphragm constricts or expands in response to changing liquid levels in the reservoir so that the level of the test liquid stays substantially the same as that of the level of the liquid in the reservoir. The electronic sensor measures the position of the test liquid and sends an appropriate signal to a control system that actuates the weir to raise or lower it in response to changing liquid levels in the reservoir.
Klaus Becker, Hamburg, Federal Republic Of Germany assigned to BTC Biotechnik International GmbH The composition of stable microbial mixed biocenoses can be controlled by the addition of growth factors and/or inhibitory substances, optionally together with certain nutrients. It is possible in this manner to suppress, e.g. the undesirable formation of bulking sludge in sewage treatment plants or to improve the digestion of food or fodder containing biopolymers in the intestine or rumen.
5015393 AUTOMATICALLY ADJUSTABLE WEIR AND ENVIRONMENTALLY PROTECTED SENSOR FOR A FLOATING SLUDGE REMOVAL SYSTEM Frederick Russell, Brandon Russell assigned to Protectaire Systems Co A liquid level sensor for occluded water is provided to detect the surface water !level as in a
5015995 FLUID LEVEL MONITOR Trevor J Holroyd, Derby, United Kingdom assigned to Stresswave Technology Limited A fluid level monitor for monitoring the fluid level in a tank comprises a first pair of transducers arranged in a vertically upper horizontal plane and a second pair of transducers arranged in a vertically lower horizontal plane. Pulse generators send electrical pulses to the transmitter transducers which transmit stress waves into the wall of the tank. The stress waves propagating peripherally are detected by the receiver transducers and processors analyze the amplitude of the detected stress waves to determine if the fluid is present or absent at the upper and lower horizontal planes. The pulse generators are arranged to send pulses out of phase so that stress waves propagating axially can be detected to determine alterations of the fluid level between the upper and lower horizontal planes. The processors may be arranged to operate alarms or to operate valves to control the fluid level in the tank.