Alarming device can be used in Zone 1 state or 2 hazardous locations. Alarming device main function is to monitor the environment of toxic and hazardous concentrations of flammable gases. The main gas monitoring CO, H2S, NH3, CL2, H2, and other organic and certain inorganic substances, and converted into the corresponding display data, and (4-20) mA standard output current signal, and other devices connect to the DCS . Users can also choose the company's gas detection and alarm controller to centralize observation and control. 

Features: 
Long life, high sensitivity, low drift, stable and reliable; 
Sensor fault self-test, two concentration alarms with relay output; 
LCD or digital gas concentration digital display and working status display; 
With temperature compensation, automatic zero calibration function; 
4 ~ 20mA standard analog output and RS485 digital output, you can upload DCS, PLC systems; 
Infrared remote control or by magnet control method, the detector is not open can be adjusted, safe and convenient; 
With explosion-proof design for hazardous conditions 1, Zone 2;

Technical Parameters: 
Detection principle: catalytic combustion; Electrochemical Detection of gas: alkanes, alkynes, hydrogen and other gases; toxic gas Sampling method: natural diffusion test range: 0 ~ 100% LEL 
0 ~ **** PPM (based on the measured gas decision) 
Resolution: 1% LEL; 1PPM / 0.1PPM 
Measurement error: ± 5% LEL full scale 
Status indication: 3 LED lights indicate power, two alarm debug mode: IR control response time: <30s 
Recovery time: <30s 
Ambient temperature: -20 ℃ ~ 50 ℃ 
Relative Humidity: <95% 
Explosion-proof way: Explosion-proof grade: Ex d ⅡC T6 Gb 
Protection: IP65 
Power Supply: DC24V ± 25% 
Output signal: 4 ~ 20mA or RS485 
Power: ≤3W 
Mounting thread: G1 / 2 
Cable: ≥1.5mm² × 3-point line; ≥1.5mm² × 4 maximum distance between the probe and the host bus: ≤1000m 
Machine weight: ≤1500g 
Pressure limit: 86kPa ~ 106kPa 
Use: in explosive flammable gas IIA ~ IIC class, temperature class T1 ~ T6 hazardous area use

Applications: 
Widely used in pharmaceutical, chemical fertilizer, natural gas pipe network, sewage Water treatment, municipal, metal fabrication steel, acetylene plant, refrigeration plant, chemical plant, gas station area, boiler room, operating rooms and other hotel kitchen needed a place antivirus fire and explosion .

Selection coding QD6330

Example: QD6330M2A, remote transmitter display, 2-channel sensor with sound and light alarm lights.

Measurable gases and related parameters table (if not listed, please contact the gas company)