In this video, we’ll demonstrate cleaning an EXO Conductivity Sensor.
We offer two options for the conductivity/temperature sensor, a wiped and non-wiped version. We’ll start with the non-wiped version removed from the EXO Sonde.
Take care when removing any sensor from the EXO sonde so the sensor ports do not get contaminated. For instructions on how to properly remove and install sensors, please review that specific EXO University video.
Every non-wiped conductivity sensor includes a cleaning brush. It is important to only use the cleaning brush that is included with the sensor as other brushes may damage the electrodes.
It is good practice to clean the conductivity sensor after each use. This can be done using a little bit of tap water. Simply dip the brush in the water and insert through the top of the sensor and twist several times.
You’ll notice there are two holes or channels that run through the non-wiped conductivity sensor. Be sure to clean both of them with the included brush.
For dirty or fouled sensors, use a mild dish soap to more-effectively clean the channels and be sure to rinse thoroughly.
For heavily-fouled sensors, you can soak the sensor tip in white vinegar. The soaking time can vary from 15 minutes to a few hours; this will depend on the level of fouling.
For wiped-conductivity sensors, you can simply soak the sensor tip to remove fouling rather than using the cleaning brush. Just remember to do a thorough rinse with tap water after soaking.
You can verify that your sensor is clean by taking a measurement in air. A clean conductivity sensor should read 0 in air.
For long-term storage, which is anything longer than four weeks, the sensor can be stored dry. For short-term storage, the sensor can be stored in a humid-air environment such as the sealed EXO cup with a small amount of tap water.
Be sure to calibrate the sensor before its next use. Please check out our other EXO University videos, and thanks for watching!