Troubleshooting of fixed TVOC gas detectors


Fixed TVOC (Total Volatile Organic Compounds) gas detectors are essential tools used in various industries to monitor and detect the presence of harmful gases in the environment. These detectors provide an early warning system to prevent accidents, protect workers, and ensure compliance with safety regulations. However, like any electronic device, TVOC gas detectors may encounter issues or malfunctions that require troubleshooting. In this article, we will discuss common problems that may occur with fixed TVOC gas detectors and provide troubleshooting steps to resolve them.

False Alarms:

One of the most common issues with TVOC gas detectors is false alarms. False alarms can occur due to various reasons, including sensor contamination, environmental factors, or improper calibration. To troubleshoot false alarms, follow these steps:

Check for sensor contamination: Inspect the sensors for any dust, dirt, or debris that may be obstructing the detection process. Clean the sensors using a soft cloth or a brush, ensuring not to damage the sensitive parts.

Verify the environmental conditions: Certain environmental factors, such as high humidity, extreme temperatures, or the presence of certain chemicals, can trigger false alarms. Ensure that the detector is installed in an appropriate location and that the environmental conditions are within the specified operating range.

Calibrate the detector: Improper calibration can also lead to false alarms. Follow the manufacturer’s instructions to calibrate the gas detector properly. Regular calibration is essential to maintain accurate readings and minimize false alarms.

No Alarm Activation:

TVOC gas detector fails to activate the alarm when gas is present, it can pose a significant safety risk. To troubleshoot this issue, consider the following steps:

Check the power supply: Ensure that the gas detector is receiving power from a reliable source. Check the power cables, connections, and power outlets to ensure they are functioning correctly.

Inspect the alarm settings: Verify that the alarm settings are configured correctly. Check the alarm thresholds, sensitivity levels, and activation modes. Adjust the settings if necessary to ensure that the alarm is triggered when gas concentrations reach hazardous levels.

Test the alarm functionality: Perform a manual test of the gas detector’s alarm system. Follow the manufacturer’s instructions to activate the alarm using a test gas or simulate the presence of gas. If the alarm still does not activate, there may be a fault in the alarm circuitry or the sensor, and professional assistance may be required.

Inaccurate Readings:

TVOC gas detectors rely on accurate measurements to provide reliable data. If the detector is displaying inaccurate readings, it can lead to incorrect assessments of the gas concentration levels. Troubleshoot this issue with the following steps:

Check the calibration: Improper calibration can result in inaccurate readings. Verify that the gas detector is calibrated correctly and follow the manufacturer’s instructions for calibration procedures.

Inspect the sensor: Over time, sensors can degrade or become faulty, leading to inaccurate readings. Check the sensor for any physical damage or signs of wear. If necessary, replace the sensor with a new one according to the manufacturer’s recommendations.

Verify the gas source: Ensure that the gas being detected is of the correct type and concentration. Use a calibrated gas source to confirm the accuracy of the detector’s readings.

Malfunctioning Display or Controls:

If the display or controls of the TVOC gas detector are not functioning correctly, troubleshooting steps may include:

Check the power supply: Ensure that the gas detector is receiving sufficient power. Verify the power cables, connections, and power outlets for any issues.

Reset the detector: Some display or control issues can be resolved by resetting the gas detector. Follow the manufacturer’s instructions to perform a reset, which may involve power cycling or pressing specific buttons.

Contact technical support: If the display or control issues persist, it may indicate a more significant problem with the device. Contact the manufacturer’s technical support for further assistance or to arrange for repairs or replacement.


Fixed TVOC gas detectors are critical tools for ensuring safety in various industries. However, they may encounter issues or malfunctions that require troubleshooting. By following the steps outlined in this article, users can resolve common problems such as false alarms, no alarm activation, inaccurate readings, and malfunctioning displays or controls. It is essential to refer to the manufacturer’s instructions and seek professional assistance when necessary to ensure the proper functioning of TVOC gas detectors and maintain a safe working environment.

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