Suction pressure transmitters designed for precise negative pressure measurement relative to ambient. Ideal for industrial vacuum control and monitoring applications.
Suction pressure transmitters are sensing devices designed to measure and report pressure levels below the ambient atmospheric pressure. These devices utilize a sensing diaphragm referenced to the surrounding atmosphere, enabling them to accurately quantify the degree of vacuum or negative pressure within a system. Essential for a wide array of industrial, research, and medical applications, from monitoring pump inlets and controlling vacuum furnaces to ensuring the efficacy of medical suction apparatus, these transmitters provide critical data for process control, safety, and operational efficiency by converting the measured suction into a transmittable electrical signal.
DMK457 Marine Approved Pressure Transmitter - Marine approved pressure transmitter with 4-20mA current loop output for shipbuilding with optional CuNiFe housing for sea-water compatibility
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.
DS200P Sanitary Low Range Pressure Gauge, Switch and Sensor - All in one electronic switch, gauge and sensor designed specifically for use in the food, drink and biomedical industry for measuring process pressures.
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
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. 
IMP Low Cost Pressure Sensor - Versatile low price pressure sensor with a wide selection of electrical and mechanical options for customisation.
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.
LEO3 Current or Digital Output Pressure Gauge - LCD digital pressure gauge powered externally by a 2 wire series 4-20mA current loop or a digital interface.
XMPi Process Plant Gauge and Absolute Pressure Transmitter - Process transmitter for measuring vacuum, steam, food, pharmaceutical, oil, gas and other pressure readings necessary for the monitoring and control of bulk production processes.
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) .
DS210 Combined Low Pressure Switch, Indicator and Sensor - Low range three in one pressure switch, pressure indicator and pressure sensor for use on pneumatics and HVAC applications.
DMP331i High Accuracy Pressure Transmitter - High precision pressure transmitter with an accuracy of 0.1%FS BSL NLHR and digitally adjustable pressure ranges from 400mb up to 40 bar gauge & absolute.
- ATEX approved negative 10 mbar vacuum pressure transmitter
- Vacuum suction sensor & wall mount digital readout with switched contacts
- Solvent tank nitrogen blanketing monitoring with all welded IS/SIL2 bidirectional pressure transmitter
- Dredging vacuum pressure Transmitter
- -10…30 kPa g compound range inert gas pressure transmitter for ship IG system
- Landfill biogas extraction well depressure pressure transmitter
Find out more about Suction Pressure Transmitters to determine which product options and capabilities will best meet your application requirements.
Suction pressure transmitters are instruments engineered to accurately quantify and relay measurements of pressure below the prevailing atmospheric level. These devices are crucial in applications where maintaining, monitoring, or controlling a specific degree of vacuum is essential. The core of their operation involves a sensing diaphragm which is exposed to the process medium on one side, experiencing the suction or negative pressure. The opposite side of this diaphragm, known as the reference side, is typically vented to the ambient atmospheric pressure. This differential creates a deflection or change in the sensing element, which is then precisely converted into a standardized electrical signal suitable for transmission to control systems, data loggers, or display units.
The design considerations for suction pressure transmitters often focus on the sensitivity and stability of the sensing element at these sub-atmospheric pressures. The materials used for the diaphragm and the wetted parts are selected based on compatibility with the medium being measured, which could range from air and inert gases to more aggressive vapors or liquids in industrial processes. The integrity of the seal around the sensing diaphragm is paramount to ensure that the reference to ambient pressure is accurate and that no leaks compromise the negative pressure measurement. Unlike gauge pressure transmitters that measure positive pressure relative to ambient, suction pressure transmitters are exclusively calibrated and scaled for ranges that fall below this ambient baseline, often expressed in units such as millibar (mbar), inches of mercury (inHg), or Pascals (Pa) below atmospheric.
Engineers and technicians deploying suction pressure transmitters must consider the required measurement range carefully, as an inappropriately scaled device can lead to inaccuracies or an inability to detect critical low-pressure setpoints. The dynamic response of the transmitter is also important in applications where suction levels change rapidly, such as in automated pick-and-place systems or vacuum forming machinery. Furthermore, the environmental conditions of the installation, including temperature fluctuations and potential vibrations, can influence the performance and longevity of these transmitters, necessitating careful selection of housing materials and mounting techniques. For instance, monitoring the inlet pressure of pumps to detect potential cavitation conditions, controlling vacuum levels in degassing processes, or ensuring efficient operation of medical suction equipment are all common applications where the precise measurement of negative pressure is vital. These transmitters are also integral in HVAC systems for monitoring filter conditions or maintaining negative pressure in controlled environments like cleanrooms or isolation wards.