HANNA WATERPROOF pH & PPM PENS
Hanna Instruments has improved these affordable waterproof testers. Designed for wet areas, they incorporate an easy-to-read LCD display. Includes calibration solution. The pH tester reads from 0.0 to 0.14 pH. The PPM tester reads from 0 to 1990 PPM. Includes calibration solution.
Hanna Waterproof pH Pen $60.99 
Hanna Waterproof PPM Pen $69.99
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