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Description
Features:
| CATEGORY | SPECIFICATIONS |
|---|---|
| Product Type | Carbon Monoxide (CO) Gas Sensor Module |
| Sensor Type | MQ-9 (SnO₂ semiconductor gas sensor) |
| Target Gas | Carbon Monoxide (CO) |
| Detection Range | 10 – 1000 ppm CO |
| Operating Principle | Change in surface resistance of SnO₂ based on CO concentration |
| Loop Voltage (Vc) | 10 V DC |
| Heater Voltage (High) | 5 V ± 0.2 V (AC or DC) |
| Heater Voltage (Low) | 1.5 V ± 0.1 V (AC or DC) |
| Heating Method | Dual-temperature cycling (low temp for CO detection) |
| Load Resistance (RL) | Adjustable |
| Heating Resistor | 31 Ω ± 3 Ω (at room temperature) |
| Heating Power Dissipation | ≤ 350 mW |
| Sensitive Resistance (Rs) | 2 kΩ – 20 kΩ (in clean air conditions) |
| Sensitivity Ratio | Rs (air) / Rs (100 ppm CO) ≥ 5 |
| Concentration Gradient (α) | ≤ 0.6 |
| Standard Test Conditions | 20°C ± 2°C, 65% ± 5% RH |
| Test Circuit Conditions | Vc: 5V ±0.1V, Vh(high): 5V ±0.1V, Vh(low): 1.5V ±0.1V |
| Operating Behavior | CO concentration ↑ → sensor resistance ↓ → output signal changes |
| Stability | Reliable under controlled environmental conditions |
| Application Type | Precision CO sensing (calibrated environments) |
| Article Numbers | 5401413, 54014132, 54014133, 54014135 |
Package Includes:
1 x MQ-7 Carbon Monoxide Gas Sensor
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