Introducing GroCheck meters available in either pH or TDS. Both offer continuous readings with remote laboratory grade probes. Hangs on the wall and comes with a six foot cable. Availability: Usually ships in 2-3 business days. GroCheck PH Meters Hangs on the wall and comes with a six foot cable GPM500

GroChek TDS Meter Availability: Usually ships in 2-3 business days. GroChek TDS Meter PTM500