Zhengzhou Winsen Electronics Technology Co.,Ltd Air-Quality Detection Module User’s Manual V1.1 （Model No.：ZE40-TVOC） Valid from: 2020.04.29 Zhengzhou Winsen Electronics Technology Co., Ltd Email: [email protected] Leading gas sensing solutions supplier in C

Zhengzhou Winsen Electronics Technology Co.,Ltd Statement This manual copyright belongs to Zhengzhou Winsen Electronics Technology Co., LTD. Without the written permission, any part of this manual shall not be copied, translated, stored in database or retrieval system, also can’t spread through electronic, copying, record ways. Thanks for purchasing our product. In order to let customers use it better and reduce the faults caused by misuse, please read the manual carefully and operate it correctly in accordance with the instructions. If users disobey the terms or remove, disassemble, change the...

Zhengzhou Winsen Electronics Technology Co.,Ltd Air-Quality Detection Module ZE40-TVOC Profile The ZE40-TVOC electrochemical alcohol module is a general-purpose, miniaturized module. The electrochemical principle is used to detect the presence of TVOC in the air, which has good selectivity and stability. Builtin temperature sensor for temperature compensation; digital output and analog voltage output for easy use. ZE40-TVOC is a universal gas module designed and manufactured by combining proven electrochemical detection technology with sophisticated circuit design. Features High sensitivity,...

Zhengzhou Winsen Electronics Technology Co.,Ltd Reserved DAC（0.4~2V is corresponding 0~full scale） GND Vin(Power input 3.7V~5.5V) UART（RXD） 0~3.0V data input UART（TXD） 0~3.0V data output Reserved Fig2. Pins construction Communication Protocol 1. General Settings Table 3 Baud Rate Data Byte Stop Byte Check Byte 2. Communication Commands 9600 8 bytes 1 byte Null There are two kinds of communication mode: initiative upload mode and question & answer (Q&A) mode. We take initiative upload mode as the default settings. If users want to switch back to initiative upload mode in Q&A mode, send the following...

Zhengzhou Winsen Electronics Technology Co.,Ltd Switch to the question & answer (Q&A) mode, send the following command line format: Table 6 Start Byte Switch command To read concentration in Q&A mode, the command line format is as follows: Table 7 Start Byte Return the concentration as follow: Table 8 Start Byte (High Byte)ppb Gas concentration value = High Byte*256+Low Byte Please note that in the above calculation formula, the byte6 and byte7 means the decimalism value changed from hexadecimal. 3.Checksum and calculation Checksum = (Negative (Byte1+Byte2+Byte3+Byte4+Byte5+Byte6+Byte7))+1 unsigned...

Zhengzhou Winsen Electronics Technology Co.,Ltd Cautions 1. The module avoids contact with organic solvents (including silica gel and other adhesives), paints, chemicals, oils and high-concentration gases. 2. The module can not be completely encapsulated with resin material, nor can it be immersed in an oxygenfree environment, otherwise it will damage the performance of the sensor; 3. The module can not be used for long time in the environment containing corrosive gases, corrosive gases will damage the sensor; 4. The module cannot withstand excessive impact or vibration. 5. The module needs to...