MQ303B

Zhengzhou Winsen Electronics Technology Co., Ltd www.winsensor.com MQ303B Alcohol Sensor Character * High sensitivity * Fast response and resume * Long life and low cost * Mini Size Application MQ303B is semiconductor sensor for Alcohol detection. It has good sensitivity and fast response to alcohol, suitable for portable alcohol detector. Configuration Technical Data Model No. MQ303B Sensor Type Semiconductor Standard Encapsulation Metal Detection Gas Alcohol Concentration 20-1000ppm Alcohol Heater Voltage V H 0.9V ± 0.1V AC or DC Loop Voltage Vc ≤6V DC Standard Circuit Conditions Load RL Resistance Heater Resistance RH Adjustable 4.5Ω ± 0.5 Ω Room Tem. Heater Current IH 120±20mA Heater Power PH ≤ 140 mW Sensor PS Consumption ≤10 mW Sensing Character Resistance Rs 4KΩ-400KΩ(in air) Sensitivity S Rs(in air)/Rs(125ppm Alcohol)≥3 Slope α 0.50 ± 0.15(R300ppm/R100ppm Alcohol) Tem. Humidity 20 ±2 65%±5%RH Condition Standard test circuit Preheat time Vc:3.0 V±0.1 V DC VH: 0.9 V±0.1 V DC Over 48 hours Sensing element of the semiconductor sensor is a micro-ball, heater and metal electrode are inside, and the sensing element is installed in anti-explosion double 100 mesh metal case (see the above) Tel: 86-371-67169097 Fax: 86-371-60932988 Email: [email protected] Zhengzhou Winsen Electronics Technology Co., Ltd Sensitivity Characteristics www.winsensor.com Influence of Temperature/Humidity Fig.2 is the test circuit. You could get resi...