The detector inspects Chlorine(CL2) concentration by natural diffusion and adopts imported electrochemical sensor (catalytic combustion sensor for flammable gas), having good sensibility and excellent repeatability. The device has embedded micro control technique and Chinese user menu, making the operation easy. The cover of the detector is refined from high-intensive engineering material (compound elastic rubber), which made the detector touches well, waterproof and explosion-protection. Characteristics: Reliable and durable fixed life by the imported sensor ◆ Automatical calibration and zero-set ◆ Apparent and Clear Display Chinese menu, displaying real time and battery capacity, low battery indication and automatic turn-off for low voltage Rapid and effective warning with audible alarm, and extremely bright visual light alarm and vibrating alarm as standard. ◆Advanced self-test of complete functions automatically when turned on ◆ 1000 record capacity ◆ Alarm for sensor failure ◆ Password management to avoid wrong operation; ◆Advanced self- calibration for accuracy ◆ Gas Detected:Chlorine(CL2) ◆ accuracy: ≤± 3% F.S ◆ Response time: T90<30s ◆ Indication: Large STN LCD indicates real time and system state ◆ Alarm indication: Wide-angled light emitting diode, 85db buzz(the frequency of buzz depends the concentration),vibrating. ◆ Fault indication: indications of Zero point drift and sensor failure. ◆ Operating temperature: -30℃~ + 50 ℃ ◆ Humidity:< 95%RH non-condensing ◆ Voltage: DC3.7V Li-ion battery 1200mAh ◆ Charging time: 4h~6h ◆ Duration of operation: flammable gas ≮ 8 (non-stopped); toxic gas ≮ 300h(non-stopped). ◆ IP Grade: IP66. ◆ Weight: about 120g(including battery) ◆ Dimension: 102 mm×56mm×26mm.