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Applications

Catalytic Reduction

Regulate Ammonia Flow The Selective Catalytic Reduction (SCR)  system pictured  shows that the model 130 is being used to regulate the flow of ammonia into the system. Typically anhydrous ammonia or aqueous ammonia is added as a reducing agent to aid in the converision of Nitrogen Oxides into diatomic nitrogen and water.

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Pressure Monitoring

A differential pressure gauge / switch / transmitter can help identify pump issues.  Issues such as too high or low suction or discharge pressures  can be caused by  cavitation, loss of flow, mechanical failure, vibration, and bearing wear. While a switch can provide a warning for a defined pressure point, a 4-20ma transmitter in combination with a […]

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Pressure Monitoring

Liquid tank level measurement

Diaphragm and Bellows type instruments can be used as liquid level indicators. With the high pressure port connected to a tap at the bottom of a tank and the low port kept open to atmosphere as shown, a  differential pressure instrument  can be used to measure liquid level as a function of head. Desired units (mm., […]

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Liquid tank level

Cryogenic tank level measurement

Diaphragm and Bellows type differential pressure instruments calibrated in weight or volume are effectively used in cryogenic tank level monitoring. Tanks can be stationery  ( vertical or horizontal)  or they can be used in tanker transport vehicles. Most cryogenic  instrumentation utilizes a “dry gauge” design where there is no internal liquid fill. This prevents any leaking […]

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Cryogenic tank

Reverse flow detection

Reverse flow rate can be detected with the use of a differential pressure instrument. (Cost effective way to detect reverse flow) Reverse flow condition can be detected with the use of a differential pressure instrument. When differential pressure is measured across a restriction in the flow line , we can measure flow rate. In applications […]

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Reverse Flow

Flow rate monitoring and control

Flow rate can be controlled using valves with the assistance of the gauge. Flow rate adjustment is done with the help of valves in pipelines. Diaphragm type differential pressure instruments selected as per service and range are used to control the flow rates. These gauges are also available with glycerin filled indicators to limit pointer […]

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Flow Rate Monitoring

Backflow prevention

Used to test system differential pressure and to check assemblies used in back flow prevention. Diaphragm type instruments Model 845-5 and 835 with bottom and vent connection are used for testing system differential pressure and checking assemblies used for back flow prevention. Backflow Test kits are also available in 2 and 3 valve models. Learn […]

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Strainer Monitoring

Used to monitor pressure drops across strainers in petroleum/ chemical industry. Differential pressure instruments are used to monitor pressure drop across strainers used in line with positive displacement flow meters. Petroleum oil companies and chemical plants use positive displacement flow meters to measure volume. Contaminated fluids can damage these expensive and critical flow meters. Strainers […]

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Strainer Monitoring

Self Cleaning Filter

Used to monitor clogging of filter A Piston or diaphragm type indicating differential pressure gauge with a switch are ideal for monitoring filter conditions. An  adjustable switch can initiate a cleaning cycle to  self-clean / backwash  a filter automatically at a preset differential pressure.

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Self Cleaning Filter

Natural Gas Filtration

Recommended in the natural gas industry for applications with a greater presence of dirt particles For greater amount of dirt particles, diaphragm instruments are recommended. Models 140, 142 and 240 are convoluted elastomer diaphragms. Red Maximum follower pointer is a popular option.

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Natural Gas Filtration

HVAC Systems

Differential Pressure Gauge with a switch is set to signal an alarm at a preset value of pressure differential.Diaphragm type differential pressure instruments are used on heat exchangers to measure pressure differential in a transformer oil cooling system. The oil passing through the heat exchanger is kept at a higher pressure than the water that […]

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HVAC System

Irrigation Filtration

Monitor filter clogging in the irrigation industry. Water from canals is filtered before it is used for irrigation. The Mid-West Instrument Model 146 Indicating Switch detects when the filter is clogged and provides a switch output.  Once the switch has been activated, a back flush starts which helps remove and drain the sediments from the […]

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Irrigation Filtration

Filter Monitoring

Air and collector bag filter Monitor filter clogging in the clean air industry. In pharmaceutical, food and chemical processes, small batches of compounds are to be dried. Dryers specially made for this purpose use hot dry air. Air is sucked from the room through filters and blown over heater coils. The blower forces this hot […]

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Filter Monitoring
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