MQ-137 Ammonia Detection NH3 Gas Sensor Module Analog + TTL Level Dual Output

Hign-concerned Chemical : None Is Smart Device : no Model Number : Sensor Module With LCD Screen Or Not : No DIY Supplies : ELECTRICAL Brand Name : alloet Origin : Mainland China Certification : none Sensor Module : NH3 Gas Sensor Module Main chip : LM393, NH3 gas sensor probe Working voltage : DC 5V Module size : 32*30*22mm/1.26*1.18*0.87"