MQ-3: เฉพาะทางสำหรับตรวจจับแอลกอฮอล์ เช่น เอทานอล ใช้ในเครื่องตรวจวัดแอลกอฮอล์
MQ-3: เน้นตรวจจับแอลกอฮอล์โดยเฉพาะ
- เอทานอล
- เครื่องดื่มแอลกอฮอล์
- เบนซิน
Features:
1. High quality double panel design, with power indicator and TTL output signal.
2. Have DO switch signal(TTL) output and AO analog signal output.
3. TTL output signal for low level effectively. (when the low output electric signal lights at ordinary times, can be directly connect single chip microcomputer or relay module)
4. Analog output voltage with concentration, the higher concentration, the higher voltage.
5. Has better sensitivity with the liquefied petroleum gas, natural gas, city gas, smoke.
6. Has long service life and reliable stability
7. Rapid response recovery features
Specifications:
1.Heater voltage: 5±0.2V (AC•DC)
2.Loop voltage: ≤24V (DC)
3.Load resistance: adjustable
4.Heating Resistance: 31Ω±3Ω (Room temperature)
5.Heating Power: ≤ 900mW
6.Surface thermal resistance: 2Kohm-20Kohm (0.4mg/L alcohol)
7.Sensitivity: Rs (in air)/Rs (0.4mg/L alcohol) ≥ 5
8.Working temperature: 20 degree ±2 degree
9.Humidity: 65%±5%RH
Connection mode:
1. VCC: Positive (5 v)
2. GND: Connect power negative
3. DO: TTL switch signal output
4. AO: Analog signal output
Size: approx. 32 x 22 x 27mm
Main chip: LM393, ZYMQ-3 gas detector
Working Voltage: DC 5V
With signal output instructions.
Two-way signal output (TTL level output and analog output).
TTL output effectively signal for low level(when the output low level signal lights, can directly connected microcomputer).
Analog output 0 ~ 5v voltage, the higher the concentration, the higher the voltage.
Has a high sensitivity and good selectivity.
Has long service life and reliable stability.
Rapid response recovery features.
For motor vehicles and other prohibition drunken drivers homework personnel on-site testing, also used in other places of ethanol detection.
Color is shown as pictures.
Package Included:
1 x Gas Sensor Module
note:
After the sensor is driven, need to warm about 20s, measured data becomes stable, the sensor heating is normal.