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Measure Chemical Conditions with a Sensor Made for Embedded Projects
The Formaldehyde HCHO Sensor Gravity is an environmental sensor designed for water quality work, lab projects, and environmental monitoring. It is a practical fit for makers, students, and engineers who want reliable sensor data in embedded builds.
Key details include Detection Range: 0~5ppm; Input Voltage: 3.3~6V; Output Signal: Optional DAC(0.4～2V,for 0-5ppm) or UART(9600).
Important: Most gas and chemical sensors work best after warm-up and calibration. Readings can drift with temperature, humidity, and sensor age.
Why you’ll love it
- Easy wiring: Gravity-3Pin
- Controller output: Optional DAC(0.4～2V,for 0-5ppm) or UART(9600)
- Sensing range: 0~5ppm
- Power range: 3.3~6V
- Readable detail: 0.01ppm
- Useful spec: 22 g
Compare with similar products
| Product | Sensor style | Standout |
|---|---|---|
| Formaldehyde HCHO Sensor Gravity | environmental sensor | Current item |
| Oxygen Sensor I2C Gravity by DFRobot | chemical sensor module with I2C | I2C interface |
| Analog Dissolved Oxygen Sensor Meter Kit For Arduino Gravity | chemical sensor module with analog output | analog output |
| Air Quality Monitor PM 2.5, Formaldehyde, Temperature & Humidity Sensor | dust sensor | gas detection, humidity sensing |
What you can build
This sensor is a good fit for water test rigs, hydroponics monitors, lab logging, aquarium control, and environmental stations.
Starter bundles
Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus a breadboard or jumper wires for quick setup and testing.
Recommended add-ons
Useful add-ons include calibration solutions, probe holders, and a data logger, depending on how you plan to power, mount, and log the sensor.
Technical specifications
| Product | Formaldehyde HCHO Sensor Gravity |
|---|---|
| Interface Type | Gravity-3Pin |
| Output Signal | Optional DAC(0.4～2V,for 0-5ppm) or UART(9600) |
| Detection Range | 0~5ppm |
| Input Voltage | 3.3~6V |
| Resolution | 0.01ppm |
| Weight | 22 g |
| Dimension | 38*28*15mm/1.50*1.10*0.59inches |
| Target Gas | HCHO |
Wiring & usage notes
Connect power and ground, then wire TX and RX to a serial-capable controller at the correct logic level and baud rate. Most gas and chemical sensors work best after warm-up and calibration. Readings can drift with temperature, humidity, and sensor age.
What’s in the box
1 × Formaldehyde HCHO Sensor Gravity
Frequently Asked Questions
What does the Formaldehyde HCHO Sensor Gravity measure?
It is designed to measure sensor data for embedded projects.
Can I use it with Arduino, ESP32, or Raspberry Pi?
Yes. It is well suited for common maker and embedded platforms, as long as you power it at the correct voltage and match the signal level to your controller.
How do I connect this UART sensor?
This version uses UART or serial output, so you connect power plus TX and RX at the correct logic level.
Does it need calibration?
Yes. Chemical and gas sensors usually need warm-up time, calibration, and periodic checking if you want stable readings.
Is it good for prototyping?
Yes. It is a practical choice for learning, proof-of-concept builds, and small automation projects.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
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