GB90 portable gas detector Features: ◆ Small size, light weight, easy to carry, easy to operate. ◆ Measurable: Gas ◆ Built correction coefficient, measurement precision. ◆ Anti-static polycarbonate shell, safe and durable. Use of: ◆ kinds of petroleum, petrochemical, chemical production plant area, municipal, fire, gas, telecommunications, coal, metallurgy, electric power Technical parameters: ◆ Measurement: Continuous ◆ Measuring range: 0 ~ 100% LEL / 0 ~ 5% CH4 ◆ Accuracy: ± 1% LEL or ± 3% display ◆ Zero Drift: <1% of range / month ◆ Response time: <20s (T90) ◆ Protection grade: IP66 ◆ Riot Rating: EEx ia d IIC T4 98.D5022X (Europe) EEx ia d I 98.Y3001X (Europe) EEx ia d IIC T4 GB3836 (China) ◆ Sampling Method: Diffusion / manual pump-priming ◆ Display: LCD with backlight ◆ Alarm: a programmable alarm / a fixed-point set by the factory alarm ◆ Power supply: 3 R6 1.5V alkaline batteries / 3 Ni-Cd rechargeable battery ◆ Working time: 12 hours battery / batteries 30 hours ◆ Working temperature: -20 ° C ~ +45 ° C ◆ Weight: 230G ◆ Size: 144 * 53 * 30mm