WZ-H3N-mini Selective Formaldehyde Module

Product catalog summary

Introduction
The WZ-H3N-mini is a compact and selective formaldehyde module designed by ProSense Technologies Co., Ltd. It integrates a selective HCHO sensor with advanced electronic control technology to convert HCHO concentration into PPM. The module is pre-calibrated and can be directly integrated into systems, offering low interference from other gases like C2H5OH.

Applications and Features
Typical applications include smart homes, portable and wearable devices, air conditioners, and air cleaners. Key features are selective detection, high precision, fast response, long service life, small size, and high stability.

Technical Specifications

Model: WZ-H3N-mini
Detection Principle: Micro fuel cell
Detectable Gas: HCHO
Detection Range: 0-1ppm
Overload: 5ppm
Input Voltage: 3.3-5V
Response Time (T90): <120S
Resolution: 0.01ppm
Accuracy: ±30ppb or ±10%
Operating Temperature: -40℃ to 70℃
Operating Humidity: 10% - 90% RH (non-condensing)
Lifetime: 6 years in air
Warranty: 12 months
Weight: 4g

Cross Sensitivity
The module shows minimal cross-sensitivity to interference gases such as alcohol, benzene, acetic acid, ammonia, carbon monoxide, and hydrogen.

Communication Protocol
The module uses serial communication with a baud rate of 9600, 8 data bits, 1 stop bit, and no parity bit. It supports active upload and Q&A communication types, with commands provided for switching modes and reading gas concentrations.

Checksum Calibration
A function is provided for checksum calibration to ensure data integrity during communication.

Notes
Users are advised to avoid altering the sensor or electronic components on the PCB and to protect the module from organic vapors, solvents, high gas concentrations, excessive vibration, and shock.

Contact Information
ProSense Technologies Co., Ltd., Building 4, Lianjian S&T Park, Longhua District, Shenzhen, China. Tel: +86 755 3669 0079, Website: www.szprosense.com, Email: [email protected]

Catalog excerpts

WZ-H3N-mini Selective Formaldehyde Module-1

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WZ-H3N-mini Selective Formaldehyde Module-2

8 Operation manual for WZ-H3N-mini Selective HCHO Module WZ-H3N-mini compact & selective formaldehyde module combines selective HCHO sensor with advanced electronic control technology, converting HCHO concentration into PPM directly. WZ-H3N-mini selective HCHO module has very low response to interference gases, such as C2H50H and can generate accurate detection result. WZ-H3N-mini selective HCHO module is pre-calibrated in the factory and can be integrated into your system directly. Typical Applications Smart home Portable devices Wearable devices Air conditioners Air cleaners

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WZ-H3N-mini Selective Formaldehyde Module-3

Operation manual for WZ-H3N-mini Selective HCHO Module Technical Specification Communication Protocol

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WZ-H3N-mini Selective Formaldehyde Module-4

8 Operation manual for WZ-H3N-mini Selective HCHO Module Module makes use of serial communication. Communication configuration parameters are:

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WZ-H3N-mini Selective Formaldehyde Module-5

Operation manual for WZ-H3N-mini Selective HCHO Module Gas concentration = concentration (high byte)*256 + concentration (low byte) Checksum calibration /************************************************************************* *Function name：unsigned char FucCheckSum(uchar *i,ucharln) *Function description：checksum calibration[Take Not(Byte1+Byte2+…Byte7) +1] *Note：Take Not(Byte1+Byte2+…ByteX (X>2) *************************************************************************/ unsigned char FucCheckSum(unsigned char *i, unsigned char ln) { unsigned char j, tempq=0; i+=1; for(j=0; j<(ln-2); j++) {...

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