Bluelab pH Probe LED Lighting Inside Dimensions: 16" x 40"

Inside Dimensions: 16" x 40" x 4

each consisting of a round 2-gallon pot with ½" fittings

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Includes replaceable 9 volt battery and calibration solution

easy to replace screw on cap membranes and long battery life

Bluelab pH Probe LED Lighting Inside Dimensions: 16" x 40"A replacement probe for Bluelab Combo and pH Meters, and Guardian Monitors. The Bluelab pH Probe is a replacement pH probe (electrode) suitable for use with Bluelab products that test the pH value of a solution. Unfortunately pH Probes do not last forever as they age through normal use and will eventually fail. With good care and use (keeping the probe tip wet and cleaning once a month) you will extend its life. The Bluelab pH Probe has a double