Low range pressure measurement sensing devices. Analog & digital output pressure sensors for measuring low range pressures.
Products
- TM Silicon Strain Gauge Pressure Transducer - Passive compensated pressure transducer with a four arm semiconductor Wheatstone bridge circuit which produces a 100 millivolt with a 10 volt excitation.
- 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
- DPS300 User Switchable Pressure Range, Volts or Current Output Low DP Sensor
- PrimAtü 10 Low Cost Low Range Differential Air Pressure Transducer
- DCT531P RS485 Modbus RTU Flush Pressure Sensor
Applications
- Low operating temperature plus/minus 1 psi pressure transmitter - Low range pressure transmitter with a bidirectional compound range from minus 1 to plus 1 psi gauge and low operating temperature of -40 degC.
- Portable data acquisition trolley +/-20 kPa dp RS485 Modbus RTU interface air pressure sensor and display package - A digital display, pressure sensor and digital interface module package for use on portable data acquisition trolleys to measure pressure of air over a range of -20 to 20 kPa diff from two 6.6mm dia x 11mm barbed hose connections, and sending the corresponding reading via a RS485 Modbus RTU interface through the terminal block connector electrical connections.
- 20 inH2Og range 4-20mA output natural gas pressure transducer for commercial generator use
- Ethylene glycol antifreeze compatible 300 pascal dp sensor
- 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
- -200 to 200 Pa bi-directional range 4-20mA output dp pressure transmitter for venturi tube
- 0-50 mbarg 4-20 mA output natural gas monitoring pressure sensor
- -2 to 2 inHg g 4-20mA out intake and exhaust air pressure sensor for building management use
- -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
- -0.5 to +0.5 bar gauge 0-5 volts output compound range pressure sensor
Product Types
- 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 Voltage Output Pressure Transducers - Low range amplified voltage output pressure transducers with highly sensitive sensing diaphragms for measuring low pressure readings, and sending a voltage output signal which is proportional to the required low pressure range.
- Low Pressure Range Intrinsically Safe Pressure Transmitters - 4-20mA current loop output pressure transmitters with intrinsically safe (IS) certification, and low pressure scale operating range.
- Low Range DP Sensors - Low range differential pressure sensors for measuring very small pressure differences.
- Low Range DP Voltage Output Transducers - Low pressure range dp transducers for measuring draft pressures in ventilation systems or air extraction systems.
- 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).
Related Product and Application Guides
Related Help Guides
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.