Bluelab TDS Truncheon is a favourite nutrient meter! It has a super tough, high quality, fully waterproof design, no calibration required, daylight readable blue LED's and no on/off buttons to worry about.

Built with affordable & advanced technology, the replaceable double-junction Bluelab pH Probe has been designed with longevity in mind.

Luster Leafs Rapitest Moisture Meter instantly indicates when plants need water, how much light plants are receiving and no batteries are required.

The Bluelab pH Pen will quickly and accurately measure your hydroponic solution’s acid/ alkaline balance. Use to maximize plant nutrition and ensure optimum plant health, growth and yields.

Fluval's pH Wide Range Test (4.5 - 9.0) measures the general range of pH in fresh or salt water aquariums. By determining whether your water is acidic or alkaline, you can create a natural habitat for your fish & or plants.

Gardeners can conveniently test moisture & pH levels with the handy Active Air 2-Way Meter. Moisture readings register on a scale of 0 (dry) to 10 (moist). pH readings between pH 3 (acidic) & pH 10 (basic) are represented.

Hanna Battery for pH or PPM Pen sold each individually

Bluelab's Conductivity Pen (EC or ppm) measures conductivity & temperature.

The Hanna HI98107 Waterproof pH Tester is easy-to-use & makes monitoring water quality simple. Features 0.1 resolution with automatic 2 point calibration & temperature compensation in a single, portable, pocket device.

The TrolMaster Aqua-X 2-in-1 EC & Temperature probes provide accurate & reliable monitoring on the EC & temperature of the water being monitored by the Aqua-x.

The Aqua-X Reservoir pH Sensor for the Aqua-X Irrigation Control System provides accurate & reliable monitoring on the pH of the water being monitored by the Aqua-x.

The Water Control Sensor allows the user to monitor the percentage of water nutrients within the growing medium.