The explosion-proof electrical contact pressure gauge is composed of a blast-proof housing, measuring system, electrical contact assembly, adjusting device, and cable gland box.

The explosion-proof housing of the explosion-proof electrical contact pressure gauge boasts excellent explosion-proof properties. Therefore, it not only withstands the explosion pressure generated by the explosive gas mixture inside the housing upon ignition but also effectively prevents the rapid outward transmission of heat energy. Instead, the heat can only slowly spread outward through the tiny gaps along the explosion-proof joint surfaces within the housing. By this time, the instantaneous temperature transmitted to the exterior of the housing has been reduced below the ignition temperature of the explosive gas mixture, thereby preventing any propagation of the explosion.

The explosion-proof electrical contact pressure gauge operates by detecting the elastic deformation of the measuring element (the spring tube within the measuring system). This deformation is mechanically transmitted to drive the contacts within the electrical contact assembly, causing them to either close or open. This action allows the circuit in the pressure control system to be either connected or disconnected, thereby achieving the purpose of automatic control, alarm, and on-site indication.

The explosion-proof electrical contact pressure gauge is suitable for use in places with explosive hazards, where it is used to measure the pressure of non-crystalline, non-solidifying explosive mixtures or various non-explosive mediums.

The explosion-proof electrical contact pressure gauge, when paired with electrical devices equipped with corresponding explosion-proof characteristics or safety measures (such as relays and contactors), can achieve automatic control and signaling (alarm) functions for the controlled system.