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Version:V1.0 —— May 2021

ATH25 Data Sheet

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3 Expansion Performance

3.1 Operating Conditions

The performance of the sensor is stable within the recommended working condition shown in

Figure 4. Long-term exposure to the condition that outside of the normal range of conditions,

especially humidity is over 80%, may cause the output signal temporary drift (drift + 3% RH

after 60 hours). After returning to the normal working condition, the sensor will slowly recover

to the calibration status. Refer to "Recovery Processing" in section 4.3 to accelerate the

recovery process. Long-term operating under the abnormal conditions will accelerate the

aging of the sensor.

Figure 4. Working conditions

3.2 RH Accuracy at Different Temperatures

Figure 2 defines the RH accuracy at 25°C, and Figure 5 shows the typical humidity error for

other temperature ranges.

Figure 5. The typical error of humidity in the range of 0~80°C, unit: (%RH)

Please note: The above error is the typical error (excluding hysteresis) of the reference instrument test

with a high-precision dew point meter.