Transducers

Transducers are devices that convert a physical quantity into a proportional electrical signal for measurement, monitoring, or control purposes. In test and measurement and process industries, transducers encompass a broad family of sensing devices that respond to mechanical, thermal, acoustic, electromagnetic, or chemical quantities and produce an analog voltage, current, or digital output. Examples include pressure transducers, force transducers, displacement transducers (LVDTs), vibration transducers (accelerometers), and ultrasonic transducers. Unlike loop-powered field transmitters with standardized outputs, transducers typically require dedicated signal conditioning or data acquisition hardware to interface with control systems.

Transducers form the sensing front end of virtually every measurement system, from simple pressure monitors to complex multi-axis structural test rigs. Selection criteria include the physical quantity to be measured, measurement range, accuracy class, frequency response, and environmental protection rating.

Typical Applications

Pressure and force measurement in structural testing and materials characterization
Vibration and acceleration measurement in rotating machinery and predictive maintenance
Displacement and position sensing in precision machining and robotics
Acoustic and ultrasonic measurement in non-destructive testing (NDT) and flow metering
Temperature sensing via thermocouples and RTDs in process and laboratory environments

Popular Brands

PCB Piezotronics (MTS Systems) is a leading manufacturer of piezoelectric force, pressure, and vibration transducers. Kistler specializes in high-precision piezoelectric transducers for dynamic measurements in automotive and aerospace testing. Honeywell and TE Connectivity offer extensive ranges of pressure and force transducers for industrial applications. Omega Engineering supplies a broad catalog of temperature, pressure, and flow transducers.