How to clean Bluelab pH Pen and Bluelab pH Probes [+ video]

Clean pH probe heads regularly to ensure accurate readings

Regular care and maintenance of your Bluelab pH probes is important to ensure accurate readings. Salts and organic oils can build up on the probe blocking the sensors, so if your pH readings seem incorrect, are fluctuating, or you have an error message on your pen, it's likely your probe needs some care and cleaning.

Check and clean your pen once a month for best results. 

Use this cleaning guide for:

Download a PDF of these instructions for the pH pen. 


To ensure proper cleaning, use the Bluelab pH Probe Care kit (or use a mild dish washing liquid) and follow the steps below. 

1. Remove cap

For the Bluelab pH Pen, pull the cap to remove.

For the Bluelab Soil pH pen, unscrew the dibber from the storage cap until you see a gap. Then gently remove the storage cap from the probe. (Don't pull the cap off until your have unscrewed it, as this will cause permanent damage.)

For the Bluelab Leap Probe, hold cap, twist one full turn, then gently remove. 

2. Fill a small plastic container with clean tap water

Add a small amount of Bluelab pH Probe Cleaner or mild detergent to the water. 

3. Gently stir the probe tip in the mixture

Ensure that you don't knock the pen on the side of the container as this might cause damage to the glass probe. Rinse well under fresh running water to remove all traces of detergent. 

4. If the probe requires removal of heavy contamination:

Gently brush around the glassware with a few drops of Bluelab pH Probe Cleaner or mild detergent and a soft toothbrush. Rinse well to remove all traces of detergent. 

5. Calibrate the pH probe

Calibration is required after every clean. Follow the Bluelab pH Pen calibration guide, and place the storage cap back on the probe. 

To get the longest life from your Bluelab pH probes, read our care and maintenance guide. 


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