I have a confusion regarding the difference between the maximum working pressure, overpressure and burst pressure for pressure transmitters.
Max working pressure is the operating range of the pressure sensor, normally described as the “full scale” or “pressure range”.
Overpressure is the maximum amount of pressure or multiples of the measurement range that can be applied to a sensing device without causing damage. In some cases an allowance for performance degradation will be included in the overpressure rating, but since this is a typically a zero offset, it can be easily removed by adjustment to the electronics.
Overpressure is sometimes mistaken for burst pressure which is the maximum safe pressure or multiple of the measurement range that can be applied without causing a breach of pressure containment.
e.g. A pressure transmitter with a 7 bar g pressure range described as having a 4x overpressure and a 10x burst pressure would have the following pressure limits:
- Full Scale = 7 barg
- Overpressure Rating = 28 barg
- Burst Pressure = 70 barg
Featured overpressure protected products
DPT200 High One Side Overload Differential Pressure Sensor - DP transmitter for measuring pressure difference between two pressure points which can tolerate up a very high overload pressure independently on either the positive or negative side port or both together at the same time.
DMP 335 All Welded Stainless Steel Diaphragm Pressure Sensor - All welded stainless steel diaphragm pressure sensor for mobile hydraulics, refrigeration or oxygen applications. This pressure sensor is available in the ranges from 6 bar up to 600 bar gauge with a 4-20mA or 0-10Vdc output signal.
Related Help Guides
- Symptons and Causes of Damage to Pressure Transducer Diaphragms
- Selecting a pressure range for optimal service life and accuracy
- Protecting a pressure sensor from high pressure spikes
