Digital MEMS VOC Gas Sensor Module （Model No.:ZM01） Manual Version: 1.5 Valid from: 2023-06-25 Zhengzhou Winsen Electronics Technology Co., Lt

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 components inside of the sensor, we shall not...

ZM01 MEMS VOC Gas Sensor Module Production Description: The Digital VOC module is a low-power, miniaturized module. The module uses a semiconductor Gas sensor and a highperformance micro-processor to detect gas concentrations in the environment. The module has high sensitivity, small size and adopts I2C digital signal output mode, which is convenient for using and debugging. It can shorten the user's design and development cycle. The module can be widely used in environmental safety, portable equipment and many other areas. Characteristics: MEMS technology Stable and strong structure Low power...

Figure 1：pin definition of sensor(bottom view) Figure 2: ZM01 dimension figure Sensitivity curve Figure 3: sensitivity curve

Temperature & Humidity Curve Figure 4: temperature and humidity characteristic curve IIC communication protocol Bus description The IIC protocol is a special bus signal protocol. It is composed of three parts: start (start signal), stop (end signal), and binary data, as shown in the figure below. At the beginning, SCL is high and SDA is falling edge. After that, send the slave address. After the 7-bit address bit, it is the control read and write bit to select the read and write operation. When the slave recognizes its corresponding address information, it will send a response signal to the master,...

Typical signal simulation Start Signal Slave address Address format: the upper 7 bits are the module address of the sensor (0x55), the lowest bit is the read/write operation bit, 1 means read, 0 means write. A7 Hardware connection Note: In the user's internal, IIC communication needs to use pull-up resistors on the SCL and SDA lines, with a resistance value of 1-10K. The recommended clock frequency is less than 50KHz. Data interface Power supply pin (VCC GND): The supply voltage range of ZM01 is 2.4V-2.6V. Serial clock input (SCL): The SCL pin is the IIC communication clock line. Serial Data...

Data frame format The data frame contains 4 bytes in total, and the data content is shown in the table below. 0 Slave address(R/W address included) Read command Slave address(R/W address included) VOC concentration level value Note: The VOC concentration is divided into 200 levels, the minimum is 1, the maximum is 200. VOC concentration = grade value*range/200 Application Method: The sensor needs warm-up after power-on for about 100 seconds. After preheating is completed, the sensor enters into normal working condition. Connect the module to the I2C bus, and the host sends a read command to enter...

2. Following conditions must be prohibited 2.1 Exposed to organic silicon steam Sensing material will lose sensitivity and never recover if the sensor absorbs organic silicon steam. Sensors must be avoid exposing to silicon bond, fixature, silicon latex, putty or plastic contain silicon environment. 2.2 High Corrosive gas If the sensors are exposed to high concentration corrosive gas (such as H2S, SOX, Cl2, HCL etc.), it will not only result in corrosion of sensors structure, also it cause sincere sensitivity attenuation. 2.3 Alkali, Alkali metals salt, halogen pollution The sensors performance...

Welding temperature ≤350℃; Duration ≤5s. Violation of the above conditions of using will degrade the characteristics of the module. Packaging method MEMS modules are coated with special protective film to prevent the influence of dust, water, gas and high temperature. The protective film can be removed after welding. Using braid packaging, we can also provide other packaging methods according to customer requirements. Environmental protection clause RoHS: This product complies with current RoHS. Zhengzhou Winsen Electronics Technology Co., Ltd Add: No.299, Jinsuo Road, National Hi-Tech Zone,...