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Replacement electrode for the Hanna Combo Meter Item TM250.
Hanna combo meter
This combination meter measures EC, TDS, pH and temperature, all-in-one! Waterproof and fast, this meter has a replaceable pH electrode as well as a renewable cloth junction that adds to the life of the meter. Comes with auto shut-off. It also automatically temperature compensates (ATC). Large, easy to read LCD.