Advantages: Multi-detector 1, simultaneous measurement of four kinds of parameters: air temperature, air humidity, dew point temperature, wet bulb temperature 2, the data for 3, extremes capture Features: 1. Ambient temperature and for coal mine Humidity site testing. 2. The fast response time 3. Temperature Range -30 ~ 100 ℃, the resolution of 0.01 ℃ 4. humidity range of 0% to 100%, with a resolution of 0.01% 5. maximum, minimum measurement and data hold function 6. backlit Digital LCD high precision, wide range, fast response, long standby time Product parameters: Humidity range 0% ~ 100% RH Temperature Range -30 ℃ ~ 100 ℃ dew point temperature of -30 ℃ ~ 100 ℃ wet bulb temperature 0 ℃ ~ 80 ℃ Display 4-1 / 2 dual display with backlit LCD screen response time 1S (at 90% 25 ℃ still air) sampling rate 5 times / sec Humidity Accuracy ± 1% RH Accuracy ± 0.5 ℃ temperature accuracy of ± 0.5 ℃ wet dew point Kick Accuracy ± 0.5 ℃ Application: widely used in coal mainly through prevention, mine rescue aid, occupational health, coal supervision departments, mechanical and electrical department, mine ventilation resistance measurement, mine safety evaluation agencies.