Semiconductor Alcohol Sensor

Semiconductor Alcohol Sensor

Specification:

MQ-K3 is a semiconductor sensor for Alcohol detection. It has very goodsensitivity and fast response to alcohol, suitable for portable alcoholdetector. 

Sensitive material of MQ-K3 gas sensor is SnO2, which with lower conductivityin clean air. When the target alcohol gas exist, the sensor’s conductivity is higheralong with the gas concentration rising. Please use simple circuit, Convertchange of conductivity to correspond output signal of gas concentration.

Character:

1. MQ-K3 gas sensor with good sensitivity to alcoholgas                                                                                      

2. Long life and lowcost                                          

3. Simple drive circuit

Application:

1. Vehicle alcohol detector

2. Portable alcohol detector

Technical Parameter:
Gas: Alcohol gas
Detection range: 10 to 1000ppm
Characteristic gas: 100ppm Alcohol
Sensitivity: R in air / R in typical gas ≥ 5
Load Resistance: 1～50KΩ adjustable
Response time: ≤ 30s
Recovery time: ≤ 60s
Heating current: ≤ 150mA
Heating voltage: 5.0V
Measuring voltage: 5～50V
Operating Conditions Ambient temperature: -20～+55℃
                        Humidity: ≤ 95% RH
                        Environmental oxygen content: 21%
Storage conditions Temperature: -20～+70℃ 

                          Humidity: ≤ 70% RH