Suction Pressure Sensors for Negative Gauge & Vacuum Measurement

Suction pressure sensors for measuring negative gauge reference pressure. Select pressure sensors for measuring the level of pressure below ambient atmospheric pressure.

Suction pressure sensors are specialized instruments designed to accurately measure pressures below the ambient atmospheric level, often referred to as negative gauge pressure or vacuum. These devices are crucial for applications where the creation, monitoring, and control of sub-atmospheric conditions are paramount, providing a precise indication of the pressure deficit relative to the surrounding environment. From industrial automation and process control to research and development, suction pressure sensors with a negative gauge reference ensure operational efficiency, safety, and the integrity of vacuum-dependent processes.

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.

Suction Pressure Transmitters - Find suction pressure transmitters designed for precise negative pressure measurement relative to ambient. Ideal for industrial vacuum control and monitoring applications.
Suction Pressure Transducers - Choose suction pressure transducers with 0-5V or 0-10Vdc outputs. Ideal for measuring suction from millibars to 1 bar, ensuring linear and precise vacuum monitoring.

Find out more about Suction Pressure Sensors to determine which product options and capabilities will best meet your application requirements.

Suction pressure sensors are specifically engineered to quantify pressures below the prevailing local atmospheric pressure, a domain often referred to as negative gauge pressure or vacuum. Unlike absolute pressure sensors that measure against a perfect vacuum, or standard gauge sensors that measure positive pressure relative to ambient, suction pressure sensors provide a precise indication of how far the pressure has dropped below the surrounding atmospheric level. This capability is crucial in applications where a specific level of vacuum or sub-atmospheric condition must be established, monitored, and controlled with accuracy. The design of these sensors often involves careful consideration of diaphragm sensitivity and movement in the negative direction, ensuring reliable performance even when measuring slight deviations below ambient pressure.

The term negative gauge reference pressure is central to understanding the operation of these devices; it means the sensor is calibrated with atmospheric pressure as its zero point, and any decrease from this point registers as a positive reading on a vacuum scale or a negative reading on a compound gauge scale. Selecting the appropriate suction pressure sensor requires attention to the required measurement range, the nature of the media being measured (which might be drawn into the system by the suction), and the desired accuracy, particularly at the lower end of the sub-atmospheric spectrum. For instance, in industrial automation, a pick-and-place robot might use suction cups, and the sensor verifies that sufficient negative pressure is achieved to securely grip an item before initiating a transfer, preventing drops and ensuring process integrity.

In process engineering, suction pressure sensors are integral to vacuum conveying systems, where bulk materials are moved through pipelines by creating a pressure differential. They help optimize flow rates and detect blockages by monitoring the suction levels at various points. Similarly, in research environments, such as altitude simulation chambers or experiments requiring controlled vacuum conditions for material processing or coating, these sensors provide critical data for maintaining the integrity of the experimental setup. Other applications include monitoring the intake manifold pressure in internal combustion engines to optimize fuel efficiency and performance, managing vacuum levels in degassing systems to remove dissolved gases from liquids, and ensuring proper operation of vacuum pumps and ejectors by measuring their inlet pressure. The choice of sensing technology, whether piezoresistive, capacitive, or other, will also depend on the specific demands for stability, response time, and resilience to potential contaminants encountered in these diverse suction applications. Calibration routines for these sensors must accurately reflect the negative gauge reference, ensuring that readings validly represent the pressure deficit relative to the ambient environment.