Principle Introduction:
Winsen Electronics, research and produce air quality monitoring gas sensor for home and office air cleaners, and fresh air system.
MP503 gas sensor is for air quality.It adopts multilayer thick film manufacturing technology.The heater and metal oxide semiconductor material on the ceramic substrate of subminiature Al2O3 are fetched out by electrode down-lead,encapsulated in metal socket and cap.Conductivity of the sensor is affected by the concentration of target gas.The higher the concentration is,the higher conductivity of sensor gets.Users can adopt simple circuit to convert variation of conductivity into output signal corresponding to gas concentration.

Applications :
It is used in occasions such as household and office for harmful gas detection, automatic exhaust device, air cleaner&etc.

Technical parameters :

Tips:For more parameter information, please refer to the latest manual provided by salesman.

Model			MP503
Sensor Type			Semiconductor flat surfaced sensor
Standard Encapsulation			Metal Cap
Detection Gas			Alcohol, Smoke
Detection range			10～1000ppm(Alcohol)
Standard circuit	Loop voltage	VC	≤24V DC
	Heating voltage	VH	5.0V±0.1V AC or DC
	Load resistance	RL	Adjustable
sensor features in standard test condition	Heating resistance	RH	95Ω±10Ω(Room Tem.)
	Heating consumption	PH	≤300mW
	Surface resistance	RS	1KΩ～30KΩ(in 50ppm Alcohol)
	Sensitivity	S	Rs(in air)/Rs(in 50ppm Alcohol)≥5
	Concentration slope	α	≤0.6(R100ppm/R30ppm alcohol)
Standard condition of test	Temperature, humidity		20℃±2℃；65%±5%RH
	Standard test circuit		VC:5.0V±0.1V； VH :5.0V±0.1V
	Warm-up time		More than 48 hours

Reference Circuit :

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