Low pressure transmitters with 4 to 20 milliamp current output for measuring low level gauge, differential & absolute pressures below 1 bar (15 psi, 400 inWG or 1000 mbar). Low pressure transmitters are used to measure air ventilation pressures in buildings and small pressure differences between two different locations such as clean rooms and laboratories where it is important to prevent air contamination.
DMP457 Marine Approved Pressure Transmitter - Marine approved stainless steel diaphragm pressure transmitter with 4-20mA current loop output for shipbuilding in ranges from 100mb to 600 bar gauge or absolute.
DPS200 HVAC Differential Pressure Transmitter - Differential air pressure sensor with a 10 volt or a 4-20mA output for building ventilation applications. Ranges from 0 to 6 mbar up to 0 to 1000 mbar.
DPS Low Differential Pressure Transmitter - Ultra low differential pressure transmitter for HVAC applications with 4-20mA current loop or amplified voltage output signal in pressure ranges from 0.1 mb up to 1 bar differential. 
DMP331P Hygienic Flush Pressure Transmitter - Sanitary pressure sensor wth exposed diaphragm with no crevices for high temperatures up to 300 Degrees Celsius in ranges from 100mb up to 40 bar gauge or absolute
DMP331 Precision Pressure Transmitter - Stainless steel pressure transmitter with ranges from 100mbar up to 40 bar gauge or absolute. Special options for ATEX , SIL2 and compound ranges.
DMP343 Low Range Pneumatic Pressure Sensor - DMP343 pneumatic pressure sensor for measuring very low range pressures on pneumatic control systems, heating, ventilation and air conditioning systems (HVAC) .
DPS300 User Switchable Pressure Range, Volts or Current Output Low DP Sensor - The DPS 300 is a low range HVAC differential pressure sensor. The lowest possible pressure range is 0...100 pascals. 2 or 3 switchable pressure ranges, plus volts or current output are included with most standard configurations.
IMPLR Low Range All Stainless Steel OEM Pressure Sensor - Low cost sensor for measuring small pressure ranges from 0-50 mbar (10 inH2O) to 0-1000 mbar (15 psi) of liquids or gases.
41X High Precision Low Range Pressure Transmitter - High precision pressure transmitter for measuring very low vented gauge reference or differential air pressures. Rangeable 4-20mA or 0-10 volt output.
PrimAtü 10 Low Cost Low Range Differential Air Pressure Transducer - The PrimAtü 10 low cost low range differential air pressure transducer can detect and display both positive and negative differential pressure variations of very low low pressure ranges from 0.5 up to 1000 mbar/hPa, and output the pressure as a 4-20mA, 0-20mA or a 0-10Vdc analog output.
DMK351 Liquid and Gas Resistant Intrinsically Safe Low Range Gauge Pressure Sensor - Intrinsically safe liquid & gas resistant low range pressure gauge reference pressure sensor for CHP, biogas and landfill sites.
DMK 458 Seawater Low Range Pressure Transmitter - Sea water corrosion resistant low range pressure transmitter for marine, ship and offshore engineering.
- 4 inch water column range 4-20mA differential pressure sensor for liquids
- -3 to 3 psi dp range high accuracy 4-20mA air pressure transmitter for water treatment use
- -2 to 2 inHg g 4-20mA out intake and exhaust air pressure sensor for building management use
- 0-50 mbarg 4-20 mA output natural gas monitoring pressure sensor
- -200 to 200 Pa bi-directional range 4-20mA output dp pressure transmitter for venturi tube
- -3 to 4 mbar dp range 4-20mA ATEX approved biogas pressure sensor for process control use on a 1bar line
- 3 psig range 4-20mA output natural gas pressure sensor for building boiler heating use
- 10psig 4-20mA oily wastewater pressure sensor with hi-temp protection for tank level gauging use
- -0.1 to +0.1 inH2O g range 4-20mA signal air pressure sensor and display for pharmaceutical manufacturing use
- 10 psig 4-20mA out submersible freshwater pressure sensor for underwater structure research
- 1 inH2O differential intrinsically safe 4-20mA out air pressure sensor for HVAC use
- 1 mbar range 4-20mA output biogas pressure transmitter for controlling blower fan connected to a covered lagoon
- 20 inH2Og range 4-20mA output natural gas pressure transducer for commercial generator use
- 0 to -200 mbar negative gauge suction range 4-20mA output stainless steel pressure sensor
- 800mbar absolute range 4-20mA output high temperature protected OEM pressure sensor
- -5 to +5 psi g low compound range 4 to 20 mA output OEM pressure sensor
- 20 mbarg digital display air pressure indicator and transmitter with 1/4 NPT male fitting
- 3inH2O differential 4-20mA nitrogen pressure sensor and display for annealing furnace flow control use
- 25 inH2Og range 4-20mA output natural gas pressure sensor for use in generator supply
- 3 psig range 4-20 mA output BMS natural gas or propane heater pressure sensor
- 50mbarg range 4-20mA output petrol fill level pressure sensor for automotive testing use
- 500mbarg range 4-20mA signal stainless steel pressure sensor
- 7mH2O g range 4-20mA out hydrostatic liquid level pressure sensor
- Low operating temperature plus/minus 1 psi pressure transmitter
Low pressure ranges are required to measure small pressure values, often between two locations where air is being moved from one place to another. Low range pressure measurement is required for monitoring and controlling ventilation and air extraction in office and factory buildings. In building management applications, air movement in large spaces creates very small changes in air pressure, so it is necessary to use highly sensitive measurement devices which are set to read in inches of water column, mbar, hPa or Pascals.
Pressure transmitters are measurement devices which combine amplified 4 to 20 milliamp current loop output signal conditioning electronic module with a transducer for measuring the pressure of a liquid, vapour or gas.