The HI98129 Combo tester from Hanna Instruments is designed for fast, efficient and high accuracy pH, EC/TDS and temperature measurements.
No more switching meters to measure the pH and then the EC or TDS of a solution. This tester has a hold feature to prompt the user when to take the reading & a display freeze for easy and accurate recording. Calibration and temperature compensation is automatic. The combo has a replaceable pH electrode cartridge and an EC/TDS graphite electrode which resists contamination. The temperature probe is stainless steel, for faster and more precise measurement.
The Combo is supplied complete with HI 73127 pH electrode, 4 x 1.5V batteries and electrode replacement tool (HI 73128).
Combination waterproof pH / EC / TDS tester / thermometer
Rugged, Floating Waterproof Casing
Temperature in °C and °F
EC (Electrical Conductivity) in micro siemens
TDS (Total Dissolved Solids) in ppm
Measurement Stability Indicator
Replaceable pH Electrode
Automatic pH Calibration at standard and NIST Buffer Sets
Automatic Temperature Compensation (ATC)
Adjustable Temperature Co-efficient Factor 
