Industrial Pressure Sensors
A pressure sensor is a device which is designed to test the specific pressure of a physical medium, usually a type of gas or liquid, but can also be a pressure applied by a direct contact between the sensor and solid object. These sensors have a range that they function optimally, and outside of that range, i.e. higher pressures than are rated for, they can output incorrect signals or be physically damaged. They also are rated for a certain resolution, which describes the amount of pressure change that is required to have the output signal change to reflect it. With higher resolution, there is usually a sacrifice of range and vice versa.
There are many methods to detect pressure. Some materials increase resistivity when there is a pressure that deforms their structure. Others are piezoelectric, which means that an applied pressure creates a charge in the structure which can be measured efficiently. In some sensors, a variable capacitance is measured which is caused by a strain on a built-in diaphragm.
Industrial pressure sensors are built with a strong (usually metallic) casing which is resistant to physical damage and corrosion from elements such as liquid and gasses. They are also designed to be highly resistive to any electrical effects from outside their casing. The electrical and pressure connector fittings are also designed to be hardy and damage resistant. Read more Read less