Absolute Pressure Sensors
Absolute Pressure is that which is measured relative to vacuum as opposed to Gauge pressure that is measured against Barometric pressure.
Absolute Pressure Sensors can measure pressure in relation to vacuum. They are composed of a sealed reference cavity that is totally evacuated of air molecules and hence unaffected by atmospheric pressure. They use a thin diaphragm which deforms when there are changes in pressure. This deformation is translated into an electrical signal that is subsequently processed by a circuit and converted into a standardized output format that is readable by various systems.
Unlike other pressure sensors, the side of the sensor that is not in contact with the pressure media is exposed to an absolute vacuum cavity that is sealed permanently. Due to this the deformation of the diaphragm is not impacted by atmospheric pressure
Absolute pressure sensors are used in a variety of applications, including altimeters, weather stations, food packing and more.
Product Line
Model 470
Setra Systems Model 470 offers extremely high accuracy and unmatched stability in a digital output configuration. It incorporates advanced microprocessor based circuitry and sophisticated firmware to provide system accuracy to better than ±0.02% FS.
Features:
- ±0.02% Full Scale Accuracy
- Bidirectional RS-232 Digital
- Communications I/O Port
- Engineering Unit Conversions for Pressure and Altitude
- Digital Altimeter Setting Indicator (DASI) and Corrected Altimeter Mode
- Programmable Non-Linear Functions
Model 567 Industrial Pressure Sensor
Setra’s Model 567 high performance pressure transducer offers customer accessible down-ranging capabilities, making this unit ideal for high overpressure applications.
Features:
- Superior Stability, Avoids Down Time
- ±0.15% FS Accuracy
- 5:1 Turndown for High Pressure Applications
- IP40, IP65, and IP68 Rated
- Intrinsic Safe Option
- Choice of Enclosure
- Meets CE Conformance Standards
Model 730
Setra’s Model 730 is a high accuracy absolute capacitance manometer for measuring low vacuum pressure ranges that are critical to the control of processes in photovoltaic, semiconductor and industrial markets.
Features:
- Chemical resistive nickel alloy design
- Precise low vacuum measurements
- Industry standard connections
- High accuracy: +0.5% of reading Std., +0.25% optional
- Tensioned diaphragm provides superior performance
- Wide compensated operating temperature
- Fast response time with low circuit noise
- Insensitive to environmental changes
- Exceptional overpressure capability
- CE & RoHS compliant