YJJ MQ-D2 Semiconductor Air Quality Sensor SnO2 Gas Probe for NH3 Benzene VOC Smoke IAQ Monitor

Product Description:

YJJ MQ-D2 Semiconductor Air Quality Sensor SnO2 Gas Probe for NH3 Benzene VOC Smoke IAQ Monitor

Features:

MQ-D2 Semiconductor Air Pollution Sensor (SnO2 Metal Oxide Gas Sensor)

Description: MQ-D2 is a successor to MQ135, focusing on **air quality, ammonia, sulfides, benzene compounds, smoke, VOCs**, and belongs to a broad-spectrum semiconductor sensor. It **cannot distinguish individual gases** and is a low-cost air monitoring probe.

Table

| Model | MQ-D2 |
| Principle | SnO2 Metal Oxide Semiconductor Gas Sensor |
| Detection Object | NH3 Ammonia Gas, Sulfides, Benzene-based Vapors, Smoke, Other Volatile Harmful Gases (Broad-spectrum VOC Pollutants) |
| Circuit Voltage VC | DC 5V (Recommended) |
| Heating Voltage VH | DC/AC 5V ±0.1V |
| Heating Current IH | ≤ 80mA |
| Recommended Load Resistance RL | 10kΩ (Adjustable) |
| Response Time Tres | ≤ 30 s |
| Recovery Time Trec | ≤ 60 s |
| Clean Air Output V0 | 0.2 ~ 1.5 V |
| Calibration Gas Output V1 | ≥ 3 × V0 |
| Operating Temperature | -20 ℃ ~ +50 ℃ |
| Storage Temperature | -50 ℃ ~ +60 ℃ |
| Humidity | ≤ 90% RH, No Condensation |
| Reference Test Conditions | 20℃, 55%RH, 1atm |
| Packaging | Metal Explosion-proof Cap, 6-pin Packaging |
| Preheating Requirements | First power-on preheating ≥ 5min stable; Long-term storage recommended aging 24h |
| Expected Lifespan | Approximately 2 Years |

Characteristics

- Low cost, broad-spectrum response, suitable for qualitative pollution alarms, **not suitable for high-precision quantitative measurement
- Outputs analog resistance signal, with subsequent voltage division for acquisition and ADC reading
- Small in size, suitable for batch air monitoring modules

Typical application

Indoor air quality detector, fresh air system, odor monitoring for trash bins, ammonia alarm for livestock breeding, simple VOC pollution alarm device, IoT air monitoring equipment

Specifications: