Pressure & Temperature Structural Features

Temperature Bulb (Sensing Element): Directly contacts the measured medium to sense temperature changes, commonly made of copper alloys, stainless steel, and other materials.

Capillary Tube: Connects the temperature bulb to the Bourdon tube, transmitting pressure changes, usually a seamless fine tube made of copper or steel, with an outer diameter of 1.5~5 mm and an inner diameter of 0.15~0.5 mm.

Bourdon Tube (Elastic Element): Converts pressure changes into mechanical displacement to drive the pointer indicating temperature, with a structure similar to an ordinary pressure gauge.

Main Structural Features
Simple Structure, No Power Supply Required: Operates entirely based on the thermal expansion principle of the physical medium (gas/liquid/steam), inherently safe, suitable for explosion-proof environments.

Good Shock Resistance: No electronic components, sturdy mechanical structure, suitable for vehicles, industrial equipment, and other vibration environments.

Remote Transmission and Multiple Output Types: By adding electrical contacts or resistance thermometers (e.g., Pt100), remote signal transmission, control, and alarm functions can be achieved.

Small Temperature Bulb Size: Modern designs reduce the temperature bulb volume to 1/30 to 1/60 of traditional products.

Limited Capillary Tube Length: Generally does not exceed 60 m, as excessive length reduces response speed.