SMART SENSOR AR8500 Ammonia Detector Gas NH3 Tester Monitor with Acoustic Optical Double Alarm 0‑100PPM 100-240V Item Type: Ammonia Detector Material: ABS Model: AR8500 Battery: Rechargeable Lithium Battery 3.7V 1000mAh (Built In Battery) Uses: This instrument is widely used in metallurgy, power plants, farms, mines, chemicals, scientific research, medicine treatment, pharmaceuticals, environmental protection and other fields. Support Language: English Basic Parameters: LCD Screen or Not: Yes Gas Type: Ammonia (NH3) Gas  Gas Detection: Ammonia (NH3) Gas Detector Sensor Principle: Electrochemical principle, service life of 2 years Gas Detector: Gas Monitor NH3 Detector: Ammonia Gas Detector Brand  SMART SENSOR Color  Black + Grey Display  Larger LCD display Gas Type  Ammonia ( NH3 ) gas detector Measuring range    0-100PPM Resolution    0.1PPM Basic error  0.5PPM Response time  Less than 120 seconds Recovery time  Less than 120 seconds Repeatability  Less than ± 1% Measuring Principle    Electrochemical principle, life for 2 years Low / High Alarm / Alarm Setting   Yes To alarm Acoustic, optical double alarm, can set the alarm value, an alarm sound is divided into 80 dB Working Temperature  -20-50℃ Working Humidity  <95%RH (Non Gel) Storage Temperature   0~40℃ Product Size  Approx. 181x63x30mm / 7.1x2.5x1.2in Power Supply  3.7V li battery Continuous Operation Time  >60 hours Packing   Gift Box                                                        Application  Farms, animal farm ammonia detection; Ambient air monitoring and evaluation, Landfill ammonia detection; Frozen field ammonia concentration; Dangerous space into the detection; Shop and workshop etc and the surrounding places ammonia detection; After decorating the house ammonia detection; Storage tanks, pipelines, valves, leakage detection; Waste field survey; Packing Contents  1pc AR8500 Ammonia Gas  1pc User manual  1pc Carrying case  1pc 3.7V rechargeable lithium battery  1pc Battery charger cable Diagram and LCD display ① ON/OFF ② Decrement button ③ Increment button / backlight ④ MODE : Measurement mode button ⑤ The first siren (Blue indicator) ⑥ The second siren (red indicator) ⑦ Buzzer ⑧ LCD Display ⑨ Sensor ⑩ T / R: Temperature / relative humidity button ⑪ Battery compartment cover ① Gas type ② Alarm ③ Black light ④ Battery Indicator ⑤ Measured value ⑥ Measurement prompt ⑦ ℃/℉ ⑧ Temperature Measured value Ammonia concentration detector, gas detector, gas leakage detector The concentration of ammonia in atmosphere  Human physiological reaction 5-10ppm                      The nose may be aware of the smell. 20ppm  Aware of the special smell of ammonia. 40ppm  A few people feel mild stimulation of eye. 100ppm  A few minutes of exposure caused by ocular and   nasal quite stimulating 400ppm  Cause throat, nasal cavity and upper respiratory tract acute stimulation. 700ppm  Exposure for more than thirty minutes may cause permanent damage to the eye. 1700ppm  Severe cough, wheeze thirty minutes can be fatal. 5000ppm  Severe pulmonary edema disease, a moment  can be fatal asphyxia.