Pressure Sensors, Transmitters & Gauges

Pressure gauges are used to measure and display the pressure of a liquid or gas in a system. Pressure systems are designed to operate within a specific pressure range and pressure gauges can indicate if there are pressure changes or leaks that could affect the system performance. Analog pressure gauges utilize mechanical pressure sensing technology and display the measurement using a needle movement on a dial. The needle gives a visual indication of the pressure. They do not require a power supply to operate, but are susceptible to operator error in reading the dial. Digital pressure gauges use an electro-mechanical form of measurement along with circuitry to translate the value to a reading on a display screen. They are more accurate and reliable over a wider temperature range and have remote monitoring capabilities.

Pressure sensors detect, regulate or monitor pressure and convert the input data into an electronic output signal. Gauge pressure sensors measure pressure relative to atmospheric pressure. Absolute pressure sensors measure pressure relative to absolute zero pressure. This allows for very precise measurements. Differential pressure sensors use two different pressure ports and measure the difference between the two.

Pressure transducers convert an applied pressure into a measurable electrical signal that is proportional to the applied pressure. An elastic material inside of a pressure transducer will deform when exposed to a pressurized medium and an electrical device will detect the deformation and convert the result into a usable electrical signal. The electrical signal is not linearized or temperature compensated.

Pressure transmitters amplify, linearize and compensate the signal from a pressure transducer and transmit the signal to a remote receiver.