ASCO Numatics SA21DG TE20A42B Pressure Switch is a modular two-piece assembly that pairs the SA21DG switch unit with the TE20A42B pressure transducer to monitor pneumatic system pressure. The TE20A42B transducer provides the pressure measurement used to drive the switch, enabling a defined setpoint to actuate an output signal in automation circuits. This combination is commonly used in industrial pneumatic applications to regulate compressors, regulators, and actuators, delivering reliable shutoff or activation based on monitored pressure levels. By integrating sensing and switching in one package, it simplifies installation and improves response consistency across control sequences.
