Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Brand | DFRobot |
| Model Number | SEN0321 |
| Interface Type | Analog Gravity |
| Operating Voltage | 3.3V - 5V DC |
| Detection Target | Smoke, Butane, Propane, Methane |
| Output Signal | Analog Voltage (0-5V) |
| PCB Dimensions | 42mm x 32mm |
| Weight | 15g |
| Connector Type | Gravity 3-Pin PH2.0 |
| Initial Preheat Time | 24-48 Hours |
Anonymous
Apr 01, 2026
Rating: 5/5
Sensitive
Picked up smoke from a match quite quickly. Make sure to let it warm up as instructed for accurate results.
Anonymous
Mar 26, 2026
Rating: 5/5
Great for learning
Used this for a school project involving Arduino. It was very easy to set up and the analog readings were consistent after the preheat period.
Anonymous
Mar 17, 2026
Rating: 5/5
Solid Sensor
Works well with Raspberry Pi using an ADC converter. Reliable for prototype safety systems.
Anonymous
Mar 12, 2026
Rating: 5/5
Plug and Play
Gravity interface is so convenient. No soldering required if you have the compatible controller board.
Anonymous
Jan 30, 2026
Rating: 4/5
Good quality
Took a while to stabilize the baseline readings, but once calibrated it works well. Good build quality.
Q: Does this detect Alcohol vapors?
A: MQ-2 is optimized for smoke and LPG. For alcohol, we recommend the MQ-3 sensor module.
Q: Is a specific library needed?
A: No specific library is required. You can read the sensor using standard analog read functions.
Q: Is this rated for outdoor use?
A: This module is designed for indoor prototype use and should be protected from weather elements.
Q: What is the pin definition?
A: The Gravity connector pins are VCC, GND, and Signal Output.
Q: Can I use 5V power supply?
A: Yes, this module supports operating voltages between 3.3V and 5V DC.
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