TRSI TA623B Industrial Wall-mounted Thermometer Hygrometer, External 5-meter Probe Features: 1. High-precision temperature and humidity sensor: Swiss SHT C3 high-precision sensor is used, with a sampling rate of up to 2 timessecond. 2. Hidden retractable bracket on the back: There is an independent bracket on the back, which can be placed on the desktop. 3. Upperlower limit over-limit prompt: The upper and lower limit alarm thresholds can be set for temperature and humidity respectively. When the measurement is higher or lower than the set threshold, there will be a buzzer alarm prompt sound, and the alarm prompt light will flash. 4. Four ventilation holes open windows: allow air to widely contact the internal sensor. 5. 13-inch large screen display, clear reading of numbers. Parameters: 1. Measurement method: external 5-meter probe 2. Ambient temperature: Temperature: -20~ 80 degrees Celsius, accuracy: +-1.0 degrees Celsius, resolution: 0.1 degrees Celsius 3. Relative humidity: Range: 0~100%RH, accuracy: +-4%RH, resolution: 0 ~99(0.1)%RH, 100(1) %RH 4. Temperature alarm setting range: High: -20~ 80 degrees Celsius (-4~174 degrees Fahrenheit), Low: -19 ~ 80 degrees Celsius (-2.2~176 degrees Fahrenheit) 5. Humidity alarm setting range: High: 2 ~ 99%RH, Low: 1 ~ 98%RH 6. Alarm duration setting range: 6 seconds ~120 seconds (can be cycled), factory default 6 seconds 7. Display mode: LED digital tube, single word 1.8 inches 8. Sensor: Switzerland (SHT C3) 9. Sampling rate: 2 timessecond 10. Over-range display: Hi or Lo 11. Operating environment: -20~80 degrees Celsius, maximum 80% relative humidity, indoor altitude less than 2000m 12. Storage environment: -10~50 degrees Celsius, maximum 70% relative humidity 13. Dimensions: 323x173x40mm 14. Weight: about 700g 15. Power supply: DC 5V1A