Absolute Pressure Sensors  Manufacturers, Traders, Suppliers

Pressure sensors (also known as pressure cans, pressure load cells or pressure transmitters) differ, apart from the design and the output signal, mainly in the type of reference pressure for pressure measurement: here there are pressure sensors for relative pressure, absolute pressure and differential pressure transducers.
In a pressure sensor for relative pressure, the back of the sensor element is exposed to the air pressure surrounding us. In a typical setup, a small tube leads from the back of the sensor to the plug or through the connection cable. These pressure sensors have the advantage that fluctuations in air pressure are not reflected in a fluctuation of the output signal.
The pressure sensor for absolute pressure has a small chamber on the back of the sensor membrane which is completely evacuated, i.e. the chamber is 0 bar absolute. These pressure sensors show the current air pressure, which is typically between 950 and 1050 mbar, as long as no measuring pressure is present. Changes in air pressure (e.g. due to a rising high or low) therefore lead to a change in the measuring signal without changing the actual pressure value. A special type of absolute pressure sensors are barometers, which measure the ambient air pressure very precisely. A special form of the pressure sensor is the so called sealed gauge version. Here, the reference chamber is sealed tightly at approx. 1000 mbar. These pressure sensors are mainly used for measuring ranges >10 bar. By closing the reference chamber, it is prevented that e.g. aggressive gases can penetrate into the reference chamber and cause corrosion there.
Another special form of pressure sensors are so-called differential pressure sensors or pressure transducers. Here the back of the sensor membrane is mechanically constructed in such a way that it can be used as an independent pressure connection for pressure measurement. A pressure sensor (pressure cell or pressure load cell) in this version therefore indicates zero at the same pressure on the input and reference sides. Differential pressure sensors differ substantially in their mechanical construction. Here there are simple designs which, for example, only allow dry gases for the reference side or also high-quality pressure transmitters which allow an overload (even on one side) of more than 200 bar at a small nominal measuring range of 35 mbar.
Pressure transmitters often have a very robust mechanical design and have a 4...20 mA output signal which is common in process measurement technology.

TURCK pressure sensors detect relative or absolute pressures in liquids and gases. The PS series offers pressure sensors with display and different output variants (switching and analog output) and communication via IO-Link. The PT series includes pressure sensors without display with analog output for media temperatures down to -125 °C. The PC series offers communication via IO-Link. The PK series sensors are pressure sensors with display especially for pneumatic and vacuum applications.

The range of AMSYS pressure sensors extends from wafer level silicon sensors to simple SMD-mountable sensors and compensated dual-in-line sensors to packaged, ready-to-use pressure transmitters.
In addition to pressure sensors and inclinometers, AMSYS offers miniaturized OEM sensors for humidity and t

Balluff is a medium-sized company. Family-run for four generations, it was founded in Neuhausen on the Filder near Stuttgart and has grown into a world-oriented, leading global player. It is a company with tradition and customer relationships established over years, which acts simultaneously as an important partner in innovations and as a pacesetter for its customers.
Our company opened up to the global market very early on. Today, Balluff is no longer just at home in Neuhausen, but also has a presence in Europe, Asia, North and South America, and in all other important markets. We have a presence in 68 countries worldwide. This is so we can understand and assist our customers better and be able to provide them exactly what they need: high-quality sensor, identification and networking solutions as well as software for holistic system solutions in every area of automation.
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Absolute sensor is a common pressure sensor in industrial practice. It is widely used in various industrial automation environments such as oil pipelines, water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military industry, petrochemical, oil wells, electric power, ships, machine tools, ventilation pipes, etc. The working principle of the vacuum sensor is that the pressure of the medium acts directly on the diaphragm of the sensor, causing the diaphragm to produce a micro-displacement proportional to the pressure of the medium, thus changing the resistance of the sensor, and using the electronic wire to detect this change, and converting and outputting the standard signal corresponding to the pressure.
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.

Convert physical signals into electrical signals, such as 4-20mA or 0.5-4.5V

It is the most commonly used sensor in industrial practice. It is widely used in various industrial automation environments, including water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, petrochemical, oil wells, electric power, ships, machine tools, pipelines and many other industries.