Milwaukee pH51 Waterproof pH Tester Pen

The Milwaukee pH51 Waterproof pH Tester Pen is a robust, high-accuracy meter built for growers who need dependable pH monitoring in challenging conditions. Waterproof, fast, and reliable, it’s ideal for hydroponics, coco, and soil growers who value consistent readings and durable design.

With replaceable probes and auto-calibration, this pen delivers pro-level performance at a very reasonable price.

Key Features:

• Waterproof housing – great for tough grow environments

• Fast, accurate pH readings with ±0.1 resolution

• Replaceable pH probe for long-term use

• Easy 1- or 2-point manual calibration

• Clear digital display with battery-level indicator

Ideal for:
Growers who need accurate, rugged pH monitoring in hydroponic, coco, or soil systems. Perfect for serious home growers and professionals.