✅【High Accuracy】Designed with professional electrochemical sensor, HoldPeak air quality tester 535G can quickly detect ammonia gas levels between 0-100 ppm with high accuracy ±5% within just 120 seconds. ✅【Humidity & Temperature Meter】Keep tabs on ambient temperature and humidity levels when monitor ammonia gas concentration. Measure indoor temperature between -10~50℃ with ±2℃ accuracy and relative from 0~95%. Temperature centigrade and Fahrenheit degree switchable. ✅【Adjustable Alarms Setting】Equipped with ammonia alarm buzzer, this smart NH3 gas detector would help you to stay safe and monitor ammonia concentration effectively. It supports 2 NH3 gas alarms value setting and it would alert you with beep sound and LED light if the measured value reaches the preset limit. ✅【Backlit LCD Disp.
eBay