Low range pressure measurement sensing devices. Analog & digital output pressure sensors for measuring low range pressures.
Products
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.
IWPT Wireless Battery Powered Pressure Sensor and Receiver - Wireless battery powered pressure sensor and receiver system for connecting pressure sensors without wires to a central wireless receiver which converts each received pressure signal channel to a 1-5Vdc, 4-20mA output, USB, Ethernet TCP, RS232 RTU, RS485 RTU or 2G 3G 4G mobile cellular network.
- ATEX approved negative 10 mbar vacuum pressure transmitter - ATEX certified intrinsically safe pressure transmitter for measuring from 0 to minus 10 millibar gauge vacuum pressure.
- 10Pa diff range 0-20mA output air pressure sensor for automotive component testing - A very low range pressure sensor for automotive component testing use to measure pressure of air over a range of 0 to 10 Pa diff from two barbed tube hose connections, and sending the corresponding 0-20mA signal through the DIN plug electrical connection.
- 20 Pa DP range 0-10V output air pressure sensor for building management use - A low range 20 Pa range differential pressure sensor, ideal for monitoring filters, ventilation ducts, and HVAC systems in commercial and residential buildings.
DMP331P Hygienic Flush Pressure Transmitter
DPS300 User Switchable Pressure Range, Volts or Current Output Low DP Sensor
IMPLR Low Range All Stainless Steel OEM Pressure Sensor
DMD341 Compact Differential Air Pressure Sensor
- Low operating temperature plus/minus 1 psi pressure transmitter - Reliable pressure measurements down to -40°C. Ideal for low range applications with a -1 to +1 psi gauge range.
- 100 Pa bi-directional range differential air pressure transmitter - Bi-directional low range 4 to 20 milliamp differential pressure transmitter covering an air pressure range from -100 to +100 pascals, for cleanrooms, isolation rooms, and filter monitoring.
- 20 pascal differential pressure transducer for clean rooms - Voltage output pressure transducer with 0-20 Pa range for cleanroom applications. Provides reliable pressure monitoring to prevent contamination in critical environments.
TM Silicon Strain Gauge Pressure Transducer
DMK351 Liquid and Gas Resistant Intrinsically Safe Low Range Gauge Pressure Sensor
DMK 458 Seawater Low Range Pressure Transmitter
PrimAtü 10 Low Cost Low Range Differential Air Pressure Transducer
- Bidirectional -50 to +50 Pa diff pressure transmitter with user calibration adjustment
- Low pressure methane gas transmitter with display and switch
- Trichloroethylene compatible 100 mbar Ex pressure transmitter
- Air classification system powder duct pressure transmitter with +/-15 kPa range and ATEX/IECEx IS cert
Low Differential Pressure Transmitters - Low differential pressure transmitters for measuring small pressure differences between two measurement points on across ventilation fans, air filters or clean room walls.
Draft Pressure Sensors - Low range pressure transducers and transmitters for measuring draft air pressure in air handling systems.
Low Range DP Voltage Output Transducers - Low range differential pressure transducers are essential for monitoring and controlling air movement in a variety of applications, including ventilation systems, air extraction systems, and building management systems.
Low Range DP Sensors - Low range differential pressure sensors for measuring very small pressure differences.
Low Range USB Pressure Sensors - Low range USB pressure sensors are suitable for monitoring pressure in cleanrooms, HVAC systems, and filter monitoring, among other applications.
Low Pressure Range Intrinsically Safe Pressure Transmitters - These intrinsically safe pressure transmitters are designed for precise measurement in hazardous areas where low pressure ranges are critical.
Low Range Voltage Output Pressure Transducers - Low-range pressure transducers with amplified voltage output are precision instruments designed to accurately measure subtle pressure variations in diverse applications.
Low Pressure Transmitters - 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).
Product Description
Measuring low range pressures is typically necessary on systems that transport air or gases such as building ventilation and factory dust or fume extraction.
In order to move air or gas from one place to another, a differential pressure difference needs to be created which causes movement in the direction of higher to lower pressure. Only a relatively small difference in pressure is needed to create sufficient movement of air or gas, which is a good thing because too high a differential would cause problems with noise and opening of doors in a workplace environment.
The size of low pressure measuring devices tends to be larger than equivalent higher range ones, this is because lower pressures produce less deformation in the sensing material, and therefore a larger surface area is required to maintain sensitivity of measurement. A thinner material is also used, but this is often limited by the technology and strength of the active material.
Due to the larger surface area and thinner sensing material used in low pressure sensing devices, it is necessary to downgrade the accuracy performance compared to higher ranges, because they are more sensitive to external environmental influences such as vibration and temperature changes.
Pressure units which are used to describe low pressure ranges include pascals (Pa), millibars (mbar, mb), hectopascals (hPa) or inches of water column (inH2O, inWC, inWG, “H2O, “WC, “WG).
Pressure sensors are measurement devices for detecting variations in pressure of liquids or gases. Typically a pressure sensor is made of two subcomponents, an electromechanical assembly on the frontend, and a signal conditioning module on the backend.
The frontend of the pressure sensor is connected directly via a thread or clamped seal to a pipe or vessel containing the liquid or gas to be measured. The pressure generated by the liquid or gas will apply a force to a sensitive exposed surface area within the electromechanical assembly which produces a physical change to the material, such as a deformation. This physical change is translated into an electrical change by smaller elements incorporated into the sensitive part of the assembly, typically on the reverse side of the surface in contact with the liquid or gas.
Since there are many different types of electromechanical technology used to measure pressure, producing very different electrical characteristics, it is necessary to add on a signal conditioning module to rationalise the electrical signal and convert it to one which is a commonly used standard within a particular industry or application.
Product Help
Low pressure inflatable control with atmospheric pressure changes
We use low pressure inflatables, and we would like to be able to know what kinds of atmospheric pressure we are working with, so we can more accurately control the inflation. Could you please help point us in the right direction for what type of sensor we should use?
Typically you would control inflation by measuring the differential pressure between the interior and exterior of the inflatable. This way you can maintain inflation control independently of atomospheric pressure changes.
If the inflatable exterior pressure is atmospheric pressure then you can use a vented gauge reference pressure sensor such as the DMP343 which will measure over the range of 0-10 mbar / 4 inWG or higher.
If the differential pressure is much lower than 10 mbar / 4 inWG then we would suggest the DPS which will measure over a range as low as 0 to 0.1 mbar / 0.04 inWG.
Since the DPS is a differential pressure sensor with two connection ports it can also be used in applications where the inflatable exterior pressure is not atmospheric pressure, and requires a connection point in addition to the inflatable interior pressure.
For higher pressure ranges requiring two fitting points for inflatable interior & exterior pressure, we would suggest the DMD341 or DPS200 which have pressure ranges starting from 0-6 mbar / 2.4 inWG.