Digital temperature gauge an atmospheric humidity, air temperature and humidity uses digital pressure gauge is the temperature, humidity, barometric pressure measurement rolled into one high stability multifunction measuring instruments. Switzerland imported using a digital sensor, high accuracy, good stability, small size and low power design using widely used in agricultural research, food, pharmaceutical, chemical, meteorological, environmental protection, electronics, laboratory and other fields. Second, the characteristics 1, temperature, humidity, atmospheric pressure one measurement. 2, Switzerland imported sensors, quality assurance 3, the use of low-power design, 3V CR123A low voltage power supply, strong endurance 4, multi-unit conversion, pressure units: kPa, psi, mbar, bar, inHg, inH2O , mmHg, mmH2O, temperature units: ℃, ℉. 5, low battery voltage prompts, user-friendly with changing batteries. 6, the backlight function, user-friendly nighttime view the data. 7, small size design for easy placement and portability. 8, temperature compensated pressure measurements with high accuracy. Third, the technical indicators 1, measurement range 1.1 atm: (10 ~ 1100) mbar 1.2 Temperature: (- 10 ~ 85) ℃ 1.3 Humidity: (0 ~ 100)% RH 2, resolution of 2.1 atm: 0.1 mbar (0.01 kPa) 2.2 Temperature: 0.1 ℃ 2.3 Humidity: 0.1% RH 3, 3.1 atm accuracy: ± 1.5mbar 3.2 Temperature: ± 2 ℃ @ (- 10 ~ 85) ℃ ± 0.3 ℃ @ (25 ℃) 3.3 Humidity: ± 3% RH 4 Battery 3V CR123A Lithium battery 5, the size (60 × 100 × 26) mm