As a core device for industrial control, environmental monitoring, and agricultural intelligence, the stability and measurement accuracy of integrated temperature sensors directly affect the system's operational efficiency. Daily maintenance not only extends the lifespan of equipment, but also avoids production accidents caused by data distortion. This article systematically outlines the key points of sensor maintenance from three dimensions: cleaning and maintenance, performance calibration, and environmental management.

1、 Cleaning and maintenance: dustproof and anti fouling, ensuring the sensitivity of sensing elements

1. Regularly remove dust to avoid air intake blockage

The surface and air inlet of the sensor are prone to accumulate dust, oil stains, or insect corpses, leading to poor airflow or heat accumulation. It is recommended to clean the louver box and air inlet with a soft bristled brush or compressed air tank every month. It is forbidden to use hard tools to scratch to prevent scratching of the sensing elements. For example, a chemical company's failure to clean sensors in a timely manner resulted in air intake blockage and temperature data fluctuations±2℃Triggering false alarm.

2. Moisture proof treatment to prevent circuit short circuits

In humidity>85%In environments such as agricultural greenhouses and basements, it is necessary to regularly check the sealing of sensors. If condensation is found on the outer shell, immediately wipe it with a dry cotton cloth and check if the drainage holes of the louver box are unobstructed. A certain meteorological station experienced corrosion of its internal circuit board due to untreated condensation issues, resulting in a 50% reduction in equipment lifespan.

3. Corrosion prevention and isolation of chemical pollutants

If the sensor is used in a chemical workshop or coastal area, it is necessary to avoid contact with acidic gases (such as chlorine gas) or salt spray. Protective covers can be installed outside the sensor, or corrosion-resistant sensors can be selected (such as316LStainless steel casing). A certain electroplating factory once had temperature measurement errors exceeding the limit due to corrosion of the sensor housing10℃.

2、 Performance calibration: Regular testing to ensure long-term accuracy of data

1. Calibration cycle and standards

Calibration frequency: It is recommended to calibrate every6-12Calibration should be conducted once a month, and in high temperature, high humidity, or strong vibration environments, it should be shortened to3A month.

Calibration tool: Use a standard temperature source (such as a constant temperature bath) or a portable calibrator, and the calibration point should cover the sensor range (such as-20℃The0℃The50℃）.

Calibration record: Establish a calibration log to record the calibration time, environmental temperature and humidity, and deviation between standard and measured values. A certain food factory found a decrease in sensor linearity through calibration records, and timely replacement avoided product quality fluctuations.

2. Zero point and range adjustment

If the sensor experiences zero drift after long-term use (such as displaying temperature deviation from the actual value), it needs to be adjusted through calibration software or hardware knobs. For example, a cold chain logistics company discovered that sensors were0℃Time display-1℃After zero point calibration, the data returned to normal.

3、 Environmental management: Optimize installation conditions and reduce external interference

1. Avoid direct blowing of heat sources and airflow

Sensors should be kept away from heating equipment, air conditioning vents, or areas with direct sunlight. A certain data center installed sensors next to the heat dissipation port of the server, resulting in a measured temperature higher than the actual value5℃Causing excessive cooling of the air conditioner.

2. Anti electromagnetic interference

RS485Communication lines should be kept away from strong electromagnetic sources such as frequency converters and high-voltage cables. If it is necessary to lay in parallel, shielded twisted pair cables should be used and good grounding should be ensured. A certain factory experienced periodic fluctuations in sensor data due to untreated electromagnetic interference.

3. Power supply stability check

Regularly use a multimeter to check the power supply voltage（DC5V/12V/24V）The fluctuation range should be≤±5%If using battery power, every3Check the battery level every month, low voltage can cause signal attenuation. A certain outdoor weather station suffered damage to the sensor circuit due to battery leakage.

Conclusion

The daily maintenance of integrated temperature sensors should follow“Prevention first, regular testing”The principle. Extend the lifespan of sensing components through cleaning and maintenance, ensure data accuracy through calibration and adjustment, and reduce external interference through environmental management. For critical application scenarios such as healthcare and nuclear power, it is recommended to establish a dual person review system, where two technical personnel confirm that the data is normal after each maintenance. Only by normalizing maintenance work can sensors truly become environmental monitoring tools“Reliable eyes”.