Choose vacuum pressure transmitters for measurements over the low vacuum range of 25 to 760 Torr, using an absolute or negative gauge reference vacuum range.
Use these vacuum pressure transmitters to measure partial vacuums on manufacturing processes, food packagers, autoclave sterilizers, leak testers, suction pumps and atmospheric simulators. Vacuum pressure transmitter with a 4-20mA 2 wire current loop output for measuring suction pressures relative to atmospheric pressure or absolute zero referenced pressures.
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.
Dredging vacuum pressure Transmitter - Vacuum pressure sensor that will measure the vacuum pressure of a dredger suction pipe pump inlet.
IMP Low Cost Pressure Sensor
DMP343 Low Range Pneumatic Pressure Sensor
DPS300 User Switchable Pressure Range, Volts or Current Output Low DP Sensor
DMK457 Marine Approved Pressure Transmitter
- Air scrubber 10 inH2O negative pressure transmitter - Monitor air scrubber performance with this negative pressure transmitter. 4-20mA output, ranged to -10 inH2O. Ideal for industrial and healthcare applications.
- Waste toner dust extraction vacuum transmitter with 1000 mbar range - Intrinsically safe vacuum transmitter with ATEX approval for monitoring pressure in waste toner dust extraction systems. Features a 4-20mA output, G1/2" flush diaphragm process connection for reliable performance in hazardous dust environments.
- Landfill biogas extraction well depressure pressure transmitter - Ensure efficient biogas extraction and safe operation in hazardous landfill environments with the DMP331 pressure transmitter. This intrinsically safe device accurately measures depressure in extraction wells, contributing to optimized gas collection and environmental protection.
DMP331i High Accuracy Pressure Transmitter
DMP331P Hygienic Flush Pressure Transmitter
DMK331P Flush Diaphragm Pressure Sensor
DS200P Sanitary Low Range Pressure Gauge, Switch and Sensor
- IMPLR Low Range All Stainless Steel OEM Pressure Sensor
DS201 Combined Pressure Sensor, Display and Switch
DS200 Combined Pressure Switch, Gauge and Sensor
DMP457 Marine Approved Pressure Transmitter
- 40 mbar negative gauge vacuum transmitter for pump VSD control
- Vacuum range 0-20 milliamp output pressure transducer for leak testing
- 30 psi absolute vacuum pressure transmitter for process plant installations
- -1 to 20 bar g compound range IS 4-20mA propane pressure sensor for process control use
- Ammonia compatible -0.5 to +5 bar compound pressure transmitter
- Under and Over pressure monitoring -10…+200 mb pressure transmitter
- Marine and IS approved, -1 to 3 mWG compound range pressure transmitter
- 80 kPa suction pressure transducer with 4-20ma output
- Dairy compatible 90 kPa vacuum pressure transmitter
- Compound +/-2.5 mbar DP transmitter, indicator & alarm switch
- Low vacuum leak detection 4-20mA current loop sensor & gauge
- -1 to 10 bar ATEX pressure sensor
Find out more about Vacuum Pressure Transmitters to determine which product options and capabilities will best meet your application requirements.
The effective measurement and control of sub-atmospheric conditions are critical in numerous industrial and research settings, and vacuum pressure transmitters designed for the low vacuum range, specifically from 25 to 760 Torr, address these precise requirements. These instruments are engineered to provide accurate readings by utilizing either an absolute pressure reference, which measures against a perfect vacuum (zero pressure), or a negative gauge pressure reference, which measures downwards from the current ambient atmospheric pressure. The choice between an absolute or negative gauge reference is a crucial specification, heavily dependent on the application’s sensitivity to atmospheric pressure variations and the nature of the vacuum being monitored, whether it’s a controlled environment or a suction force.
For instance, when measuring pressures relative to absolute zero, these transmitters offer a stable and unchanging reference point, crucial for processes where the true vacuum level, independent of barometric fluctuations, is paramount. This is particularly vital in atmospheric simulation chambers where specific sub-atmospheric conditions must be precisely replicated, or in research applications demanding high fidelity vacuum data. Conversely, negative gauge vacuum pressure transmitters are ideal for monitoring suction pressures, such as the inlet of a vacuum pump or a material handling system relying on vacuum grippers. In these scenarios, the key parameter is the pressure difference relative to the surrounding atmosphere, indicating the strength of the vacuum pull.
The operational range of 25 to 760 Torr (approximately 33 to 1013 mbar) covers a significant portion of what is considered “low vacuum” or “rough vacuum.” This range is encountered in diverse applications. In manufacturing, these transmitters are integral to processes like vacuum forming, where controlled vacuum levels shape thermoplastic materials, or in vacuum drying systems that gently remove moisture at reduced pressures. Food packaging lines utilize them extensively for Modified Atmosphere Packaging (MAP) and vacuum sealing, ensuring product freshness and extending shelf life by carefully controlling the residual air and composition within the package.
Autoclave sterilizers, critical in medical and laboratory environments, rely on precise vacuum cycles. Vacuum pressure transmitters monitor the pre-vacuum phase, ensuring effective air removal from the chamber and porous loads for optimal steam penetration, and subsequently, the post-vacuum phase for thorough drying of sterilized items. In quality control, these instruments form the core of leak testing equipment, where a sealed component is evacuated, and the transmitter monitors for any pressure rise that would indicate a leak, quantifying the leak rate based on the change in vacuum over time. Similarly, they are used to assess the performance and efficiency of suction pumps, providing vital data on achievable vacuum levels and operational health.
The industry-standard 4-20mA 2-wire current loop output is a common feature for these vacuum pressure transmitters, facilitating seamless integration into existing industrial control systems, PLCs, and data acquisition units. This robust signal transmission method is well-suited to industrial environments, providing reliable and noise-immune communication of vacuum levels for process control, monitoring, and alarm generation. The scaling of this analog signal will correspond directly to the calibrated vacuum range of the transmitter, whether it’s indicating a deeper vacuum (closer to 25 Torr) or conditions nearer to atmospheric pressure (760 Torr). Careful selection ensures that the transmitter’s range, reference type, and output signal align perfectly with the specific demands of the vacuum measurement task.
Product Help
Specifying vacuum pressure transmitter requirements
Some questions to ask when defining the product requirements for a vacuum pressure transmitter.
Vacuum range
What range of vacuum do you need to measure, is it over the whole range from atmospheric pressure to a high vacuum, or a partial vacuum such as reducing the pressure to 90% atmospheric pressure?
Reference type
Are you measuring vacuum relative to full vacuum reading, which would need an absolute reference, or are you measuring vacuum relative to atmospheric pressure, which would require a gauge reference?
Current output type
What current output scaling is required for the vacuum transmitter signal, e.g. 4-20mA, 0-20mA?
Accuracy
How accurate does the vacuum reading need to be in % of full range or vacuum units such as mbar, Torr, inHg, mmHg or psi?
Electrical connection
Do you have a preferred way of connecting the current output signal to your vacuum measurement instrumentation?
Do you need a connector or a cable supplied with the transmitter?
Media type
What is the vacuum medium being measured? A vacuum measurement application often involves the removal of air, but it can involve any type of gas, and this may affect the suitability of materials used in the construction of the transducer, so it is an important consideration to ensure the long term reliability of the vacuum pressure transmitter.
Process connection
Do you have a preferred vacuum connection for mounting the transmitter? The level of vacuum being applied can influence the type of connection required, particularly high vacuums where vacuum compatible materials and vacuum seal integrity becomes more restrictive.
Checklist for vacuum pressure transmitter requirements
Define your vacuum pressure transmitter requirements using this checklist:
- Vacuum range?
- Reference type?
- Current output type?
- Accuracy?
- Electrical connection?
- Media type?
- Process connection?