Electrical conductivity (EC)
Hanna Instrument GroLine Hydroponics Waterproof pH/EC/TDS/Temperature Portable Meter – HI9814
Electrical conductivity (EC)
Hanna Instrument HI98131 GroLine Hydroponic Waterproof Pocket pH/EC/TDS/Temperature Tester
Electrical conductivity (EC)
Hanna Instruments HI98318 GroLine Waterproof EC/TDS (ppm) Tester
Electrical conductivity (EC)
Hanna Instruments The Soil TestTM Direct Soil EC Tester – HI98331