防爆气体探测器由哪些部分组成？

Q: What does an explosion-proof gas detector consist of?

A: An explosion-proof gas detector primarily consists of the following core components:

Explosion-Proof Enclosure: The core protective structure, typically designed as flameproof (Ex d), effectively isolating internal circuits from the external hazardous atmosphere to prevent electrical sparks from causing an explosion.

Gas Sensor: The core detection element, responsible for identifying and measuring the concentration of specific target gases. Common types include Catalytic combustion (for combustible gases) and Electrochemical (for toxic gases) sensors.

Processing Unit (Mainboard): The instrument’s “brain.” It processes sensor signals, calculates concentration values, and controls alarm and display functions.

Audible and Visual Alarm: Triggers a high-decibel buzzer and flashing LED lights when gas concentration exceeds preset limits, providing immediate warning to personnel on-site.

Power Supply Unit: Typically a high-performance explosion-proof certified battery that provides extended operational power while complying with explosion-proof safety standards.

Additionally, it includes a display screen (for real-time concentration and status readout) and sampling components (for diffusion or pump-assisted sampling methods). All components are specially designed and certified to ensure safe and reliable operation in flammable and explosive atmospheres.