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  • Calibrators
  • Pressure Calibrators
  • Pressure Calibrators

    Pressure calibratorsare used to ensure readings from pressure transducers and transmitters are accurate and valid for process control and operational monitoring. Therefore, they are a reference pressure sensor and used for automated calibration of other pressure sensors. High precision pressure calibrator is composes of a high precision pressure reference sensor, a pressure generating pump, a shut-off valve, and measuring electronics. Pressure calibrator can be connected to a PC via USB interface to export the stored data for further processing. For low and medium pressure ranges, pneumatic calibrators are used and hydraulic for high pressure calibrations.
    Pressure rangeHigh pressure 0 to 700 bar Medium pressure -1 to 25 bar Low pressure -1 to 10 bar
    Overpressure110%
    Total accuracy*±0.05% FS
    Resolution of display1 mbar
    Operating temperature0 to 50?
    MemoryUp to 8000
    ProtectionIP65
    * Error combination of linearity, repeatability, hysteresis, temperature, resolution of display
    The original principle of pressure manometer is based on the tube edge displacement caused by elastic deformation of the Bourdon tube under action of pressure or vacuum. The C-shaped or spirally wound bourdon tube flexes when pressure is applied producing a rotational movement, which in turn causes the pointer to indicate the measured pressure. The construction is simple yet rugged and operation requires no additional power source.Nowadays, pressure gauges with digital display use an electronic pressure transmitter as sensing element and then transmit the output into digital display readout.In the past decades, pressure transmitters have been improved significantly through different technologies and approaches that result in lower power consumption, suitability for different material, smaller size and weight, and fast response with high reliability, sensitivity, accuracy and repeatability.Below pictures and graph show different possible pressure references to adjust the pressure transmitter based on them.pressure sensorpressure sensorThere are different approaches used to measure pressure. These approaches are mostly based on special requirement of customers and advantages of the technology executed.The most common sensing technologies used today are Force collector types, Piezo-resistive and Piezo-electric, Electromechanical Strain Gage, Variable Capacitance, Electromagnetic as well as optical fibre sensing.Force collector types are electronic pressure sensors using a force collector component, such as diaphragm, piston, bourdon tube, and/or bellows, to measure the strain caused by the applied force over an area, therefore, measure the pressurepressure sensorIn respect of Piezo-resistive effect, Piezo-resistive material such as silicon, molecularly diffused onto a metal or micro-machined diaphragm, is used to detect strain generated by the applied pressure. Similar to strain gauge-based pressure transmitters, Wheatstone bridge circuit is formed to maximize the output sensitivity of the sensor.measure the pressurePiezoelectric materials are also used as sensing element due to their piezoelectric effect in response to applied mechanical stress.measure the pressureCapacitive pressure sensor uses a diaphragm and pressure cavity to create a variable capacitor to detect strain due to applied pressure. Common technologies use metal, ceramic, and silicon diaphragms. Generally, these technologies are most applied to low pressures (Absolute, Differential and Gauge).measure the pressure
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