Myron Ls TechPro II instruments have all the functionality of the previous TechPro line and have been completely redesigned to include new and improved features with greater performance. The units deliver accurate, precise, repeatable results required in critical water quality parameter measurements of conductivity and TDS (TP1 and TPH1), pH (TPH1 and TH1) and temperature. All models are waterproof, buoyant, easy to use and easy to calibrate. Lightweight and completely portable, these instruments are ideal for field use. TP1 and TPH1 models feature long-life internal electrodes and measure conductivity ranging from 0-20,000 microsiemens/ppm. TPH1 and TH1 models use a unique internal pH sensor to prevent breakage and prolong the sensors useful life. Other benefits are two- or three-point pH calibration for maximum accuracy and LCD readout. Up to 20 readings can be stored in memory for easy record management. Backed by a two-year limited warranty, lifetime service and technical [email protected]