SEN0467 H2S sensor temperature dependency
Hiroyasu Satoh 2025-06-25 21:38:24 145 Views3 Replies Dear Sir,
I am using SEN0467 H2S sensor. When I measure H2S concentration with temperature compensation off, I get values like 1ppm, 2ppm, etc, exactly at 1ppm resolution. However, when I turn on temperature compensation, the resolution becomes around 7 to 8ppm. The room temperature here is around 28.5oC. Looks as if 1 ppm difference in original measurement is magnified several times by temperature compensation. My questions are …
1) Is the temperature compensation correct? 2) If you have information on the temperature dependency of the sensor, can you disclose the document?
Thank you very much.
Best regards,
Hiroyasu Satoh
If you are using the sensor at room temperature, readings will be more accurate if you turn off the temperature compensation function.
Yeez_B Thank you very much. As the present sensor is not to be used for quantitative purpose, I continue to use it without temperature compensation. However, is it possible to have typical temperature compensation factors for 20 to 40 degrees celsius temperature range?
Thank you very much.
Hiroyasu Satoh The datasheet and wiki for SEN0467 confirm that on‑board temperature compensation is integrated and intended to correct electrochemical drift with varying ambient temperature.
However, the expected resolution remains 1 ppm, as shown in the spec sheet .
Electrochemical sensors should not magnify ambient ∆T of ~28.5 °C to ±7–8 ppm jumps.
It’s more likely that the firmware’s compensation factor or conversion coefficients are mismatched for your sensor batch or temperature range.
Or the method of temperature reading (board thermistor) may not reflect the true gas-sensing cell temperature.
ahsrab.rifat 
