A pressure transducer measures the pressure that is exerted on its sensing mechanism and alters the input into an electrical signal. They are commonly used for calibrating the pressure that a liquid or gas exerts under variable conditions. Pressure transducers are extensively used in oceanographic and aeronautics vehicle manufacturing.
Many different types of pressure transducers are made while keeping special conditions in mind. These conditions include measuring pressure that is exerted in a vacuum or when the liquid or gas is exposed to extreme temperature ranges. This measurement is then recorded onto the data logger.
The strain gauge is one of the most widely used and cost-effective transducers. When the diaphragm exerts a pressure, strain is placed on the gauges of instruments. This is then transformed to an electrical signal. However, the output can take different forms. A millivolt output transducer is among the least expensive ones.
Pressure transducers are most helpful when the environment does not feature much electrical noise and the distances involved are short. In order to take the most accurate readings, it is important to provide a consistent power supply to the pressure transducer. Voltage output pressure transducers are often less vulnerable to eclectic noise. Also, the power supply is not as important as in the case of millivolt transducers.
The 4-20mA output pressure transducer is the final type of output, which is sometimes referred to as a pressure transmitter. They are often used when lead wires should span a long distance.