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It simply attaches to a valve on the pool wall
Features a 4 inch by 3 inch oval hole and easy open front
#1 Salt Chlorination Cell in the world
You can flexibly choose the ultrasonic frequency depending on the scenarios
With the connection point positioned at the back
Bluelab PENSOILPH pH Pen for Soil, Coco, Rockwool and Solution, Easy Calibration Soil Test Kits It simply attaches to aMeasures pH in meda (and solution) for acid or alkaline conditions to make precise up and down adjustments with lab quality glass probe used for the pool, drinking water, hydroponics, brewing, and growing EASY two point calibration and auto temperature compensation makes this digital meter a handy tool with backlit LCD display and calibration reminders Complete your monitor and controller system with other testers and meters from Blue lab, more