APP : Smart Life / Tuya Life   Tuya Gas1 Sensor Product Description:   This product is a WiFi flammable gas alarm, which is used to detect the leakage of flammable gas and prevent the harm caused    by gas leakage. The alarm uses high stability semiconductor gas sensor, which has the characteristics of high stability and small    sensitivity drift. When a flammable gas leak is detected and the concentration value set by the alarm is reached, the alarm will send an    alarm signal. This product is used indoor where leakage may occur, such as kitchens.   Specification   Working Voltage:AC 85V-250V   Average Consumption:1.5W   Alarm Sound: 70dB/m   Alarm Density:6%LEL ± 3%LEL(CH4)   WIFI Standard: 802.11b/g/n   Working Temperature:-10~ +50   Working Humidity:95%RH   Installation Diagram   Before installation, please confirm the detecting gas density heavier or lighter than air. If detecting gas is heavier than air: LPG.    etc, install at 0.3-1m height from floor, semi-diameter to gas source less than 1.5m. If detecting gas is lighter than air: nature gas,    manufactured gas, marsh gas, etc, install at 0.3-1m height from ceiling, semi-diameter to gas source less than 1.5m.   Product Testing   This product has a self-test button, and there is also a self-test button on the APP, which can be used to detect whether the alarm and    the buzzer can work normally. When the self-test is pressed, the red LED of the alarm flashes. The buzzer beeps.   Alert Handling   When the concentration value of natural gas or liquefied petroleum gas with heavy ambient air reaches or exceeds the alarm concentration value,the alarm will automatically enter the continuous alarm state. At this moment, we should do the followings:   1. Close the pipeline valve immediately.   2. Extinguish all sources of ignition and avoid using everything that generates sparks.   3. Avoid switching various electrical appliances.   4. Immediately open the windows to convect the indoor air.   Tuya Gas2 Sensor Product Description:   Advantage point:   1,High-sensitivity high-stability long-life gas sensor   2,Response recovery is fast response time30 seconds   3,Large screen LCD displays gas concentration status and temperature function in real time   WiFi Gas Detector Features:    Input voltage: DC 5V (micro USB interface)   Working current: 350mA    Response time: 30s   Alarm Sound: 85dB   Installation type: wall or celling mounting   Air pressure: 86~106Kpa   Working Temperature: -10°C~60 °C   Work Humidity: 80%RH, no freezing   Item Size: Approx. 10.2 * 10.2 * 3.5cm (L*W*H)   Item Weight: Approx. 143g / 5oz   App: iOS/Android " Smart Life " or " TuyaSmart" APP Remote Control Smart    Instruction:   This gas detector used for te natural gas field,which can do the security detecting and alarming for the burning,explding,poisoning caused by naturals gas leaking and the device has the high sensitive,stable,full type gas detecting and small size features.