Flammable Gas Sensor (Methane)
Detection principle: Catalytic combustion
Sampling method: Natural diffusion
Housing material: 304 stainless steel
Explosion-proof box size: 80×74×57mm
Explosion-proof box material: Aluminum alloy
Explosion-proof grade: ExdbIICT6Gb, ExtbIIICT85℃Db
Protection grade: IP66
Electrical interface: 3/4" NPT (internal)
The sensor and explosion-proof box are pre-assembled before delivery, and connected to the split display unit via RVVP 3×1.5 cable with color-matched wiring.
Accessories: U-shaped mounting clamp and matching screws.
On-site RVVP connecting cables and threading pipes are provided by the customer.
316L stainless steel pipe is connected to the sensor through special joints and gas calibration hood via thread and buckle connection, with supporting pipe fittings supplied ex-factory.
Calibration is completed on the ground: connect standard gas hose to 316L pipe to aerate the high-altitude sensor, and calibrate the split display unit per manual procedures.
Professional technical support and on-site installation guidance are provided during field commissioning.
Flammable Gas Detector (Split Display Unit)
Signal output: 4～20mA plus HART protocol, 3-wire system
Measurement accuracy: ≤±3%FS
Power supply: DC 24V ±5V
Enclosure material: Cast aluminum
Electrical connection: 3/4" internal NPT thread
Ingress protection: IP66
Explosion-proof rating: ExdbIICT6Gb, ExtbIIICT85℃Db
Measurement range: 0～100%LEL
Response time: T90 less than 20 seconds
Local display: LCD liquid crystal display
Operating temperature range: -40℃ ~ 70℃
Primary and secondary alarm thresholds configurable according to customer requirements
Alarm mode: LED status indication and integrated local audible & visual alarm. A 120dB(A) horn is adopted for both primary and secondary alarm conditions.
Output mapping: 0~100%LEL corresponds to 4–20mA current signal
Installation method: Pedestal mounting or flat surface mounting; supplied with U-clamp for 2-inch pipe
Built-in intelligent functions include self-diagnosis, automatic zero stabilization and non-linear correction. Equipped with lightning protection module.
System Overall Installation Schematic Diagram
