Model / Part NumberMQ-2Target gasesLPG,Propane and HydrogenOperating Voltage5VOperating Humidity0-95%RHPreheat DurationOver 48 hoursHeater Voltage5.0 V +/- 0.2 VHeater Resistance31 ohm +/- 3 ohm
The analog gas sensor - MQ2 is used in gas leakage detecting equipments in consumer and industry markets, this sensor is suitable for detecting LPG, i-butane, propane, methane ,alcohol, Hydrogen, smoke.It has a high sensitivity and fast response time.And the sensitivity can be adjusted by the potentiometer.
Power supply needs 5V
Interface type Analog
Pin Definition 1-Output 2-GND 3-VCC
Wide detecting scope
Fast response and High sensitivity
Simple drive circuit
Stable and long life
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This is a GSM & GPS Modem based on Simcom's SIM808 Module. This GSM-GPS Modem is perfect for projects which require both GSM Modem & GPS Module. SIM808 module is a GSM and GPS two-in-one function module. It is based on the latest GSM/GPS module SIM808 from SIMCOM, supports GSM/GPRS Quad-Band network and combines GPS technology for satellite navigation.
It features ultra-low power consumption in sleep mode and integrated with charging circuit for Li-Ion batteries, that make it get a super long standby time and convenient for projects that use rechargeable Li-Ion battery. It has high GPS receive sensitivity with 22 tracking and 66 acquisition receiver channels. Besides, it also supports A-GPS that available for indoor localization. The module is controlled by AT command via UART.