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HCHO gas sensor

Product catalog summary

Overview: The M1001 is a formaldehyde gas sensor module designed for high sensitivity and resolution with features like zero calibration, auto compensation for drift and temperature, low power consumption, and long lifespan. It supports I2C communication and is suitable for applications such as vehicle-mounted and indoor air cleaners, kitchen and building ventilation systems, and portable gas detection devices.

Features:

Zero calibration and high consistency
High sensitivity and resolution
Auto compensation for drift and temperature
Low power consumption
Long lifespan
I2C communication
High stability and linearity

Applications:

Vehicle-mounted and indoor air cleaners
Kitchen and building ventilation systems
Portable gas detection

Technical Parameters:

Measurement range: 0-3 mg/m³ with a resolution of 0.01 mg/m³
Working current: ≤20mA
Response time: ≤10s
Preheat time: 60 seconds
Recovery time: ≤120s
Operating temperature: -10 to 40°C
Storage temperature: -20 to 60°C
Humidity: ≤95% RH (operating), ≤60% RH (storage)
Life time: 5 years

Pinout and Communication:

Pin 1: V (-)
Pin 2: V (+)
Pin 3: A (RX/CLK)
Pin 4: B (TX/SDA)
Baud rate: 9600bps
Data bits: 8
Stop bits: 1
Parity: none

Data Calculation: The CH2O gas concentration is calculated using the formula: (CH2O High (B2) * 256 + CH2O Low (B3)) * 0.01. For example, if the reading data are 2Ch, 00h, 57h, 03h, 0E8h, 6Eh, the TVOC value is calculated as 0.87 mg/m³.

Precautions:

Preheat for 5-10 minutes before first use
Avoid vibration, drops, and liquid exposure
Not suitable for systems involving personal safety
Avoid long-term exposure to high concentrations of organic gas
Do not use in applications with strong gas flow

Catalog excerpts

Formaldehyde detection module datasheet Feature • Zero calibration, high consistency. • High sensitive and resolution • Drifting auto compensation and temperature compensation • Low power consumption • Long life time • I2C communication • High stability and linearity Application • Vehicle-mounted and indoor air cleaner • Kitchen and building ventilate system • Portable gas detection

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Pinout (URAT)

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Output method Module use 2 wire I2C bus, the default is Slave Addr=0x3B, this is only read/write address, which occupied bit7 to bit1. When read from sensor, write 0x3B<<1|0x01=77. I2C data format Module pictures: Note: R2 is load resistor, it may differ from different production batch number. Common value are: 10K, 27K, 47K, 100K and 200K. The value difference will not affect the module electro performance and sensor performance.

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Outline dimension User control board IMPORTANT PRECAUTIONS • • • • • Please provide preheating for more than 5-10 min in first time use. Avoid vibration and drop, and forbid liquid into sensor inside. Do not apply this module to systems involving personal safety Do not place the module in a high concentration of organic gas for a long time Do not set module in application which has strong g

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HCHO gas sensor

HCHO gas sensor

Catalog excerpts

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