With replaceable sensors

including an extra large

high and low alarm set points

Filters are easy to install

Milwaukee pH54 Waterproof pH Tester | Replaceable Probe Pen Meter | ±0.1 pH Accuracy SE600 probe With replaceable sensorsDESCRIPTION The Milwaukee Waterproof pH54 Tester is one of our most accurate low cost, rugged and reliable pH testers in the market featuring the ability to easily replace the probe providing for years of carefree use. It's simple 2 point manual calibration is simple to use. Ideal for use in aquariums, hydroponics, horticulture, education and many other applications. The Milwaukee Waterproof pH54 pH tester offers: ACCURACY The Waterproof pH54 tester