STTC-101 Industrial Combustible Gas Alarm 1. Product Introduction& nbsp;     A gas alarm is a gas leakage detection and alarm instrument. When combustible or toxic gases leak in the industrial environment and the gas alarm detects that the gas concentration reaches the critical point set by the explosion or poisoning alarm, the alarm will emit an alarm signal to remind the work to take safety measures and drive the exhaust, cut-off, and spraying systems to prevent explosions, fires, and poisoning accidents, thereby ensuring safe production. The fixed gas alarm for industrial use consists of an alarm controller and a detector. The controller can be placed in the duty room and mainly controls various monitoring points. The detector is installed in areas prone to gas leakage, and its core component is a built-in gas sensor, which detects the concentration of gas in the air& nbsp; 2、 Applicable scope& nbsp;  Gas alarms are divided into household gas alarms and industrial gas alarms. The household gas alarm is mainly used to detect gas and natural gas leaks. Industrial gas alarms are used to detect harmful gases such as ammonia and nitrogen dioxide in the industry& nbsp; 3、 Product features; Detection object: Combustible gases in the air
Detection range: (0-100)% LEL
Detection method: Natural diffusion
Working mode: Fixed continuous operation
Sensor properties: Catalytic combustion mode Explosion proof form: Explosion proof type 4. Main parameters Working voltage: AC220V± 15% 50Hz
Environmental temperature: -20 ℃~+60 ℃< Humidity range:< 90% RH
High power consumption:< 3W/circuit
Alarm point: adjustable
Wiring method: 3-wire system (two power lines, one signal line)
Alarm style: Sound alarm (sound pressure level above 65dB at a distance of 1 meter); Alarm output: Two sets of normally open passive contacts with a capacity of 2A/250VAC for each channel. Output:
Transmission distance: up to 1500m
Small display value: 1% LEL. Response time: 90%. Response time: no more than 30 seconds.
Recovery time: no more than 90 seconds (zero return time after no gas)
Sensor lifespan: generally more than two years (the working environment of the probe is harsh, which will shorten the service life of the sensor)
Wiring method: can be directly connected to threaded explosion-proof hoses or connected using simple methods
Wiring cable: three core shielded cable (shielded cable is recommended) Explosion proof level: ExdIICT6 (Tamb=-40° C To+75° C); V. Installation, Debugging, and Usage; 1. The detector should be installed in areas prone to gas leakage, and the specific location should be determined based on the specific gravity of the detected gas relative to air< br />2、 When the specific gravity of the detected gas is greater than that of the air, the detector should be installed at a distance of (30-60) cm from the ground, and the sensing should be done& nbsp; The part of the device is facing downwards. 3. To use the detector correctly and prevent detector malfunctions, please do not install it in the following locations:
4. Places directly affected by steam and oil fumes< 5. Places with high airflow such as air supply outlets, ventilation fans, and doors; 6. Places with high levels of water vapor and droplets (relative humidity:≥ 90% RH); 7. Places with temperatures below -40 ℃ or above 55 ℃< 8. Places with strong electromagnetic fields. STTC-101 Industrial Combustible Gas Alarm