WZ-H3-NK

Overview

WZ-H3-N selective & high temperature resistant formaldehyde module is the one launched specially for application in cases where temperature is higher than 60 ℃ . WZ-H3-N HCHO module is the first application of solid electrolyte integrated in fuel cell vehicles to HCHO detection ----real solid electrolyte, free from electrolyte leakage or dry out; WZ-H3-N selective HCHO module is free from the influence of the interference gases at low concentration, such as C 2 H 5 OH and can generate accurate detection result. WZ-H3-N selective HCHO module is pre-calibrated in the factory and can be integrated into your system directly.

Features

HCHO detection in vehicle Selective detection

Air conditioners High temperature resistance

Smart home High precision

Portable devices Fast response

Wearable devices Long service life

Air purifier Low power consumption

... … High stability

Pin1 Vin(5V)

Pin2 GND

Detection Principle Micro fuel cell

Detectable Gas HCHO

Detection Range 0-1ppm

Overload 5ppm

Input Voltage 4.5-7V

Response Time (T90) <90S

Resolution 0.01ppm

Lifetime 6years in air

Warranty Period 12 months

Weight 4g

Interference Gas Concentration of Interference Gas(ppm) Concentration of HCHO(ppm)

Interface & Communication

Module makes use of serial communication. Communication configuration parameters are:

Baud rate 9600

Data bits 8 bits

Stop bit 1 bit

Parity bit None

There are two communication types: active upload type and Q&A type. The default type is active upload and it sends gas concentration once every second. Commands are as follow:

Gas concentration = concentration (high byte)*256 + concentration (low byte)

command

/*************************************************************************

*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++)

tempq+ = *i;

i++;

tempq = (~tempq)+1;

return(tempq);

➢ Avoid changing or moving sensor on the module.

➢ Avoid moving or changing electronic elements on PCB.