My CL10 chlorine sensor is reading low. What should I do?

Document ID

Document ID TE2197

Published Date

Published Date 01/06/2022
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Question
My CL10 chlorine sensor is reading low. What should I do?
Summary
CL10 chlorine sensor reading low.
Answer
If your CL10 chlorine sensor is reading low, please see the following suggestions:
1. Make sure the probe had time to condition in chlorine-containing water if it is a new sensor, or if the membrane cap was just replaced. The sensor needs 12 to 24 hours to condition before a calibration can be performed. This is to ensure the probe has stabilized to your process before adjusting the sensor
2. Make sure the probe has been calibrated and that a 2 point calibration was performed. For applications typically below 0.5 ppm a chemical zero is recommended with a process concentration calibration. For applications typically above 0.5 ppm an electrical zero is recommended with a process concentration calibration.
3. Make sure the maintenance on the probe is up to date and the cap is very secure on the end of the probe. Depending on the application, the electrolyte will need to be changed more often than others (lower concentration typically means changing the electrolyte more often)

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