Low range pressure sensors, gauges, loggers and calibrators for measuring low pressures on filtration systems, ventilation fans, air conditioning & handling systems.
These instruments are used for measuring very low pressures in applications such as on building management systems to control the distribution of air throughout the building, for ensuring a small difference in air pressure between two adjoining labs to prevent contamination, or for monitoring the increase in pressure across a filter to indicate when the filter should be cleaned or replaced.
Products
Browse low range pressure sensors and instrumentation by product type.
Low Pressure Sensors
Analog & digital output pressure sensors for measuring low range pressures.
4-20mA output low pressure transmitters
Low range pressure transmitters with 4 to 20 mA current loop output for the measurement of low level gauge, absolute and dp pressures.
TSA Precision Pressure Transmitter
DPS Low Differential Pressure Transmitter
DMP331P Hygienic Flush Pressure Transmitter
DMP457 Marine Approved Pressure Transmitter
DS210 Combined Low Pressure Switch, Indicator and Sensor
41X High Precision Low Range Pressure Transmitter
IMPLR Low Range All Stainless Steel OEM Pressure Sensor
DMD341 Compact Differential Air Pressure Sensor
XMD Process Plant DP Cell Differential Pressure Transmitter
DPS200 HVAC Differential Pressure Transmitter
DMK351 Liquid & Gas Resistant Intrinsically Safe Low Range Gauge Pressure Sensor
DMK 458 Seawater Low Range Pressure Transmitter
DMP331 Precision Pressure Transmitter
DMP343 Low Range Pneumatic Pressure Sensor
0-10v, 0-5v output low pressure transducers
Low range pressure transducers with a choice of high voltage output signals such as 0-5V, 1-5V, 0-10V or 1-10V for measuring low level gauge, absolute and differential pressures.
- TSA Precision Pressure Transmitter
- DPS Low Differential Pressure Transmitter
- DMP331P Hygienic Flush Pressure Transmitter
- DS210 Combined Low Pressure Switch, Indicator and Sensor
- 41X High Precision Low Range Pressure Transmitter
- IMPLR Low Range All Stainless Steel OEM Pressure Sensor
- DMD341 Compact Differential Air Pressure Sensor
- DPS200 HVAC Differential Pressure Transmitter
- DMK351 Liquid & Gas Resistant Intrinsically Safe Low Range Gauge Pressure Sensor
- DMP331 Precision Pressure Transmitter
- DMP343 Low Range Pneumatic Pressure Sensor
Digital low pressure sensors
RS485, RS232 and USB interface sensors for accurate measurement of low range differential or vented gauge reference pressures in applications such as air ventilation systems and laboratories where ambient air pressure is controlled to prevent contaminants entering or leaving a work area.
Low Pressure Gauges
Battery powered digital pressure gauges for testing and monitoring low range air or liquid pressures.
DM01 Multi-Range High Accuracy Pressure Gauge- DS210 Combined Low Pressure Switch, Indicator and Sensor
LEO Record (Ei) Capo Low Pressure Logger
ADT681 Digital Pressure Gauge
Baroli 02 Precision Digital Pressure Gauge
Baroli 02P Low Range Flush Diaphragm Digital Pressure Gauge
Low Pressure Data Loggers
Instruments with built-in memory storage for recording low gauge or differential air pressures. Test performance of ventilation systems or clean room air control by monitoring pressure at set time intervals. Export data to another software program for analysis or print out results for quality audit purposes.
- DM01 Multi-Range High Accuracy Pressure Gauge
- LEO Record (Ei) Capo Low Pressure Logger
- ADT681 Digital Pressure Gauge
Low Pressure Calibrators
Low level pressure range calibration equipment including hand pumps with fine volume adjustment for precise setting of low pressure calibration set-points, and high accuracy pressure indicators to use as secondary calibration standards.
- DM01 Multi-Range High Accuracy Pressure Gauge
+/- 6 psi / 0.4 bar Low Pressure Calibration Pump – ADT901
60 psi / 4 bar Low Pressure Calibration Pump – ADT912
Pressure Calibrator for Pressure Transmitter Calibration – ADT672
Help Guides
Articles with more information on low range pressure measurement products & applications.
- Low Pressure Range
- Measuring the difference in air pressure between rooms
- g Effect
- What affects the performance of low pressure sensors
Questions & Answers
Train tunnel low pressure change
We want to measure the change in pressure on a tunnel wall as a train passes through it, we expect the pressure change to be as high as 2.5 kPa. Would it be best use two absolute or one differential range pressure sensor to measure this?
Where possible always use a differential range pressure sensor to measure a pressure change that is much smaller than the baseline total pressure. If you use an absolute range pressure sensor it will have a range of ~120 kPa absolute and therefore the accuracy at the 2.5 kPa is going to be very poor, and thats before you have considered the additional error of subtracting the other static reference reading. If you use a differential pressure sensor with a low pressure range of 2.5 kPa you will measure the change directly and to a much higher accuracy.
Long pipework
Will long pipework affect low pressure readings?
Long small bore pipework will dampen pressure readings if the pressure is changing rapidly, so ideally you want to mount the sensor as close as possible and keep the pipework as short as possible, particular on connections which will have very dynamic pressures.
Trapped water in pipes
Will trapped water affect low air pressure readings?
Water trapped inside small diameter pipework used to measure a low air pressure will cause unexpected pressure changes due to the water head pressure and meniscus force effects. A slug of water in a vertical section of pipe will contribute a slight pressure on the trapped air inside the pipe. Also the surface tension generated by the air/water interface will contribute a force known as capillary action, which will cause a slight increase or decrease in pressure.
