Aqua Master E50 Pro EC Temperature Electrode grow-systems-trays-reservoirs The LEDs are protected with

The LEDs are protected with a moisture and sulfur resistant coating

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5 pounds are sold individually

This allows it to be mounted in either horizontal or vertical orientation

Aqua Master E50 Pro EC Temperature Electrode grow-systems-trays-reservoirs The LEDs are protected withDescription Aqua Master E50 Pro pH Temp Electrode: This replaceable electrode is designed for compatibility with the E50 Pro EC temperature meter. The electrode has an IP67 rating for water resistance when attached to the meter. For directions on electrode replacement, please refer to the User Manual or view the instructional video. >Directions Unscrewing the Sealing Ring: Start by unscrewing the sealing ring located on the lower part of the meter.