The gas-sensitive material used in the MQ316 odor sensor is a semiconductor material with low conductivity in clean air. When there is a gas to be measured in the environment where the sensor is located, the conductivity of the sensor increases as the concentration of the gas to be measured increases. Use a simple circuit to convert the change in conductivity into an output signal corresponding to the gas concentration .

Application

Widely used in breath odor detectors, portable alcohol detectors, etc.

Features

Widely used in breath odor detectors, portable alcohol detectors, etc.

Specifications

Model			MQ303B
Sensor Type			Semiconductor
Standard Encapsulation			Metal
Target Gas			Alcohol gas
Detection range			20~ 500ppm alcohol
Standard Circuit Conditions	Loop Voltage	V H	0.9V±0.1V AC or DC
	Heater Voltage	V c	≤6V DC
	Load resistance	R L	Adjustable
	Heater Resistance	RH	4.0Ω±0.5Ω（room temp.）
	Heater consumption	PH	≤140mW
Sensor character under standard test conditions	Zero point	V0	0.01~0.45V
	Sensitivity	VS	1.0~2.5V (in 125ppm C2H5OH)
	Concentration Slope	α	≤0.6(R300ppm/R50ppm C2H5OH)
Standard test conditions	Tem. Humidity		20℃±2℃ 55%±5%RH
	Standard test circuit		Vc:3.0V±0.1V DC VH:0.9V±0.1V DC
	Preheat time		Not less than 48 hours

* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.

1 PC MQ316 Mouth smell sensor