THE GAUGE PRESSURE TRANSMITTER
Relative pressure sensors measure pressure relative to atmospheric pressure.
THE DIFFERENTIAL PRESSURE TRANSMITTER
Differential pressure is the difference in pressure between two pressures.
Differential pressure sensors compare two pressures: a low-pressure reference pressure (LP) and a high-pressure (HP) side pressure. They are used to measure a density, a fluid level and a fluid flow. In the latter case, it is associated with a primary element that creates differential pressure depending on the flow of a fluid. 
THE ABSOLUTE PRESSURE TRANSMITTER
Pressure sensors compare relative pressure to absolute vacuum. Absolute pressure is always positive.
The absolute pressure sensor has the advantage of freeing from changes in atmospheric pressure thanks to a reference chamber to the vacuum. Absolute pressure can be expressed from relative pressure by adding 1,013 bar or absolute bar (bar abs.) – relative (bar) – 1,013
THE REMOTE SEAL PRESSURE TRANSMITTER
Remote seal pressure sensors permit to measure fluids at high temperatures.
The separator serves as a protective interface between the measurement element and the measuring fluid. There are many applications for separator sensors.
They are used to measure the flow of a liquid, the flow of gas, the flow of steam, to measure the level of a fluid in a tank, the density of a fluid or the pressure.
Separator pressure sensors can be either rigidly mounted or equipped with one or two capillaries to deport the measurement and to reduce the temperature.
For applications with corrosive fluids found in the chemical and petrochemical industries, separators are available in different corrosion-resistant materials (Inox, Hastelloy C, Monel, Tantalum,..).
For agri-food, hygienic and pharmaceutical applications, separators are available with sanitary fittings and flush diaphragm to meet health rules and requirements.
Remote seal transmitters are use in the following applications :
- The temperature of the fluid is high,
- The fluid is corrosive,
- The fluid is charged and may shutter the sensor connection piping,
- the fluid is viscous or may solidify in the sensor connection piping,
- the fluid may freeze,
- for hygienic and sanitary applications,
- to facilitate maintenance and maintenance.
THE MULTIVARIABLE PRESSURE TRANSMITTER
Multivariable pressure sensors combine differential pressure measurement, absolute pressure measurement and temperature measurement in the same sensor.
They are used in particular for the measurement of mass flow.
THE SUBMERSIBLE PRESSURE TRANSMITTER
These pressure sensors can be immersed in a liquid and can be used to measure the level of a tank or tank.
