EC & TDS Testr series and Conductivity Monitors

Check out the Testr series models for small, waterproof meters that can fill a large variety of applications. Look at the Conductivity Monitors for more permanent testing of conductivity levels.

Large Display TDSTestr New! — New large-display models with more information to make measurements easier. Direct display of Total Dissolved Solids (TDS) and temperature.
Large Display ECTestr New! — New large-display models with more information to make measurements easier. Direct display of conductivity (EC) and temperature.
Large Display SaltTestr New! — New large-display models with more information to make measurement easier. Direct display of salt concentration.
Conductivity Monitors New! —These meters are a great way to continually check levels without repeatedly pulling out a portable meter.

Testr series

APT Instruments
P.O. Box 317
Rochester, IL 62563