Features
● Standard size Φ19 × 15mm
● High accuracy and reliability
● Stainless steel 316L housing
● Stainless steel 316L wetted parts
● 0-70°C temperature compensation range
● Isolated construction, able to test various media
● Range from low pressure 0.1 bar to high pressure 1000 bar

Descriptions

SS100 series isolated OEM pressure transducer covers all pressure ranges from 100 mbar to 1000 bar (10 kpa to 100 mpa). A high-sensitivity piezoresistive silicon chip is used for pressure sensing. The chip is protected against ambient influences by a stainless steel housing sealed with a concentrically corrugated diaphragm. The housing is filled with silicone oil so as to ensure the transfer of the pressure from the diaphragm to the sensing component.

Several millions of these pressure transducers are in use world-wide in a variety of different applications. Main fields of applications are: level technology, pneumatic, hydraulics, avionics, etc.

Further information --- The difference between absolute and gauge pressure

To select the right pressure sensor for a specific application, first of all, the type of pressure measurement has to be considered besides the pressure range. Pressure sensors measure a certain pressure in comparison to a reference pressure and can be divided into absolute, gauge and compound devices. These terms will be explained on the basis of sendo sensor’s piezoresistive pressure sensors.

Absolute pressure
Absolute pressure is referred to the vacuum of free space (zero pressure). In practice absolute piezoresistive pressure sensors measure the pressure relative to a high vacuum reference sealed behind its sensing diaphragm. The vacuum has to be negligible compared to the pressure to be measured.
Gauge pressure
Gauge pressure is measured relative to the ambient atmospheric pressure. The average atmospheric pressure at sea level is 1013.25 mbar. Changes of the atmospheric pressure due to weather conditions or altitude directly influence the output of a gauge pressure sensor. A gauge pressure higher than ambient pressure is referred to as positive pressure. If the measured pressure is below atmospheric pressure it is called negative or vacuum gauge pressure. In general a vacuum is a volume of space that is essentially empty of matter. According to its quality vacuum is divided into different ranges such as e.g. low, high and ultra high vacuum. Gauge pressure sensors only offer one pressure port. The ambient air pressure is directed through a vent hole or a vent tube to the back side of the sensing element and thus compensated.