CO2/CO Monitor Controller
I. Product Overview
The TW22 gas monitor utilizes digital sensor technology and features a clear 3.5-inch LCD screen. Functions include: real-time display of CO2 or CO values, temperature and humidity values, and 24-hour date and time. It supports external temperature and humidity devices (default is an internal sensor; optional external sensors have a default range of 3 meters), with an extension range of up to 20 meters. Users can set high alarm values for CO2 or CO, as well as high and low temperature alarm thresholds. Alarms can be controlled via an interconnecting socket (10A), which can connect to various devices such as fans, air purifiers, and heating equipment. The display unit can be freely switched between Celsius and Fahrenheit (°C/℉). This product boasts powerful data storage capabilities, capable of storing up to 260,000 data sets. The automatic save interval and total save time can be set. Historical data can be conveniently viewed directly on the device or easily exported as a document for subsequent analysis and processing. The product comes with free host computer software.
II. Product Introduction
2.1. Model: TW22
2.2 Power Supply:
• Direct power supply via USB Type-C interface DC5V/1A.
• Backup power: Powered by 3 AAA/1.5V batteries. (Batteries not included in shipment)
(Please note that AAA batteries provide approximately 3 hours of battery life for CO2 and approximately 48 hours for CO. Suitable for outdoor calibration and use. For indoor use, a USB Type-C interface DC5V/1A is recommended.)
2.3 Measurement Range:
• Carbon Dioxide: 400ppm-5000ppm (optional)
• Carbon Monoxide: 0-1000ppm (optional)
• Temperature Range: -25℃/-13℉ to 70℃/158℉
• Humidity Range: 0 to 99%RH
• Response Time: 1 second
2.4 Interconnect Socket Parameters: Input: AC100-250V, Maximum Current: 10A, Maximum Power: 2500W (resistive load), 300W (inductive load)
2.5 Measurement Accuracy and Resolution:
• Carbon Dioxide: ±50ppm or ±5% of the true value, whichever is greater, resolution 1PPM
• Carbon monoxide: ≤±1ppm or ±5%, whichever is greater, resolution 1ppm
• Temperature measurement accuracy ± 0.3℃/0.5℉, resolution 0.1℃/0.2℉
• Humidity measurement accuracy ±2.0%RH, resolution 0.1RH.
2.6 Housing Material and Dimensions:
• Housing is made of durable ABS material.
• Product dimensions: 108x75x25mm (length x width x height).
• Display screen size: 93mm diagonally, 82x46mm (length x width).
III. Application Areas Widely applicable to homes, smart ventilation systems, outdoor camping, wineries, temperature control equipment assistance, home air quality and temperature/humidity monitoring; greenhouse cultivation monitoring; wine storage environment; storage room use, etc.
IV. Usage
4.1. Desktop Placement: The product features a practical stand on the back for easy desktop support.
4.2. Wall Mounting: Hook holes are provided on the back for wall mounting with nails or hooks.
V. Product Instructions
5.1 Power-On Operation: Uses a DC5V/1A USB Type-C power plug. Simply insert the device to automatically power on and operate normally. Backup Power: Requires 3 AAA batteries (approximately 3 hours of CO2 battery life, approximately 48 hours of CO2 battery life).
5.2 Button Functions: Short press: Switches between Celsius and Fahrenheit. Long press: Enters the settings menu. Short press: Turns on the backlight. Short press: Saves data once.
5.3 Display Interface Explanation:
• Displays current date and time.
• Real-time battery level display.
• Displays carbon dioxide or carbon monoxide levels, temperature, and humidity values, while providing carbon dioxide or carbon monoxide level indicators.
5.4 Data Export: Use the accompanying software to download and read data.
VI. Settings Interface Operation
6.1 Date and Time Setting (01): Press and hold the middle button SET to enter settings mode. When 01 is displayed on the right side of the screen, press the middle button SET again. Numbers will flash on the screen. Select the year, month, day, hour, and minute in sequence. Use the + or - buttons to perform the corresponding addition or subtraction operations. After setting, press the middle button to confirm and save. Press and hold SET to exit settings mode and return to the real-time monitoring interface.
6.2 Historical Data Viewing (02): Press and hold the middle button SET to enter settings mode. Use the + or - buttons to switch to 02, then press the middle button SET again to enter the historical data viewing interface. On this interface, you can view the product's saved historical data, including the record number, data saving time, CO2/CO value, and temperature and humidity. Press the + or - buttons to view data recorded at different times one by one. Press SET to exit the settings menu. Press and hold SET to exit settings mode and return to the real-time monitoring interface.
6.3 Querying and Deleting Saved Records (03): Press and hold the middle button SET to enter settings mode. Use the + or - buttons to switch to 03, then press the middle button SET again to view the total number of saved records. To delete historical records, press and hold the + and - buttons simultaneously for 3 seconds to delete all records. Press SET to exit the settings menu. Press and hold SET to exit settings mode and return to the real-time monitoring interface.
6.4 Automatic Parameter Saving Settings (04): Press and hold the middle button SET to enter settings mode. Use the + or - buttons to switch to 04, then press the middle button SET again to enter the save interval setting interface. The OFF/ON indicator will flash; use the + or - buttons to toggle it on or off. Then press the middle SET button to confirm. The numbers on the right will start flashing. Select the save interval (5 seconds - 195 seconds) and total save time (1 - 99 days). Use the + or - buttons to add or subtract values. After setting, press the middle button to confirm. Press and hold SET to exit settings mode and return to the real-time monitoring interface.
6.5 High Alarm Value Setting for Carbon Dioxide or Carbon Monoxide (05): Press and hold the middle button SET to enter setting mode. Use the + or - buttons to switch to 05, then press the middle button SET again. The value will flash. Use the + or - buttons to adjust the alarm value, and finally press the middle button SET to confirm. The value will stop flashing. The ON or OFF indicator on the right will start flashing. Use the + or - buttons to toggle the alarm on or off, and finally press the middle button SET to confirm. Press and hold SET to exit setting mode and return to the real-time monitoring interface.
The default alarm value for CO2 is 4000ppm, and the default alarm value for CO is 100ppm, both in the off state. (The product will alarm when the detected value exceeds the set alarm value.)
6.6 High Temperature Alarm Setting (06): Press and hold the middle button SET to enter setting mode. Use the + or - buttons to switch to 06, then press the middle button SET again to enter the high temperature alarm setting interface. The OFF/ON letters will flash. Use the + or - buttons to toggle the alarm on or off. Then press the middle button to confirm. The number on the right will start flashing. Use the + or - buttons to add or subtract the value. After setting, press the middle button to confirm. Long press SET to exit the setting mode and return to the real-time monitoring interface. The default alarm value is 38℃/100.4℉, and the status is off.
6.7 Low Temperature Alarm Setting (07): Long press the middle button SET to enter the setting mode. Use the + or - buttons to switch to 07, then press the middle button SET again to enter the low temperature alarm setting interface. The OFF/ON letters will flash. Use the + or - buttons to toggle between on and off. Then press the middle button to confirm. The number on the right will start flashing. Use the + or - buttons to add or subtract the value. After setting, press the middle button to confirm. Long press SET to exit the setting mode and return to the real-time monitoring interface. The default alarm value is 10℃/50℉, and the status is off.
6.8 Pairing and Manually Turning On the Socket (08): Press and hold the middle button SET to enter the setup mode. When switching to 08 using the + or - buttons, press the middle button SET again to enter the socket pairing interface (the randomly shipped socket is already paired and ready to use). Press the left or right button to manually turn the socket on or off. Pairing method: Plug the socket into a power source, then press and hold the button on the socket. When the indicator light flashes, press the left button on the product; the socket's indicator light will flash again. Then press the right button on the product; the socket's indicator light will flash again, indicating pairing is complete. Press and hold SET to exit the setup mode and return to the real-time monitoring interface.
VII. Precautions
7.1 This product is not suitable for use in environments with long-term condensation or chemical pollution. Do not use the product for extended periods in environments with high dust density. Prevent direct contact with chemical reagents, oil, dust, etc., which could damage the sensor. Also, avoid exposure to cold or thermal shocks to prevent affecting measurement accuracy and equipment lifespan. 7.2 Before use, ensure the batteries are installed correctly. Do not reverse the positive and negative terminals; otherwise, the equipment may malfunction or even be damaged.
7.3 Heat transfer and significant temperature differences between test areas can lead to inaccurate temperature and humidity measurements. Therefore, ensure the stability and consistency of the test environment as much as possible.
7.4 Place the equipment in a stable environment, avoiding direct sunlight and keeping it away from windows, air conditioners, and heating equipment. These factors may cause localized temperature and humidity anomalies, interfering with measurement results.
7.5 Keep away from high-power interference devices such as frequency converters and motors. Electromagnetic interference from these devices may affect the normal operation of the instrument, leading to inaccurate measurement data.
7.6 This product is a dedicated indoor device. Prevent water from entering the product or probe. Water ingress may cause short circuits, damage, or other malfunctions.
7.7 When the host computer software communicates with the device, avoid making any changes to the product settings.
7.8 If you encounter any problems during use, please do not disassemble or repair the product yourself. Contact our professional customer service personnel promptly for assistance. The problem will be properly resolved under the guidance of an engineer. Contact email: 171859948@qq.com
VIII. Packing List
Main unit: 1 pc
Data cable: 1 pc
Instruction manual: 1 pc
External probe: 1 pc (optional)
Wireless socket: 1 pc (optional)
