Pressure transmitter with an integral LED loop-powered digital display for use with hot oil up to 300 deg. C (max.) over a pressure range of 0-5 bar gauge. DS200P High Temperature Pressure Transmitter & Display Pressure Range: 5 bar g Output Signal: 4-20 mA (2 wire) Switch Contacts: Not...
Pressure transmitter with an integral LED loop-powered digital display for use with hot oil up to 300 deg. C (max.) over a pressure range of 0-5 bar gauge.
Pressure Range: 5 bar g
Output Signal: 4-20 mA (2 wire)
Switch Contacts: Not required
Accuracy: 0.35% FS >0.4bar, 0.5% FS <=0.4bar (std)
Electrical Connection: DIN plug (1 switch, 4-20mA only)
Media and Temperature: FFKM seal, 300degC, Vac<150degC
Pressure Connection: G1/2 Flush DIN3852, P>=1bar
Diaphragm Material: Stainless Steel 316L (standard)
Sensor & instrumentation product information, application guides, technical support articles, online converters & calculators to help with your measurement applications.
A very common example of measuring absolute pressure is using an Aneroid Barometer to measure atmospheric pressure. Inside an Aneroid Barometer, there is a hollow flexible capsule which has a high vacuum-sealed inside. As the atmospheric pressure rises and falls the differential pressure between the inside and outside of the capsule causes it to expand and contract. The expansion and contraction of the capsule is transferred into a mechanical movement by coupling it to a mechanism which moves a needle on a calibrated dial, scaled to read barometric pressure.
Another practical example of how an absolute reference is used is the absolute pressure sensor. The manufacturer will seal a high vacuum behind the sensing diaphragm so that the total pressure can be measured on the positive side of the diaphragm independently of the outside atmospheric air pressure. If the pressure connection of an absolute pressure sensor is vented to ambient air pressure it will then be measuring the barometric pressure in a similar way to the Aneroid Barometer.
Absolute pressure is measured in many applications where the changes in atmospheric pressure have no influence on the measurements. For example, when leak testing a solid-walled vessel over a long period of time the total pressure inside should remain constant independent of the changing atmospheric pressure outside the vessel. Therefore a pressure sensor or instrument with an absolute pressure reference would be the most appropriate choice for leak testing purposes.