Hanna Instruments, HI 98130 (a.k.a Combo 2)

Digital pH/EC/TDS/Temperature Meter for High Range EC

• 
• Temperature in °C and °F
• Automatic Temperature Compensation
• Rugged, Floating Waterproof Casing
• Replaceable pH Electrode Featuring an Extendable Junction

This meter provides a reliable, robust and highly accurate way of measuring  liquids such as soil solution, irrigation water or liquid fertilizer for pH and EC - all in one handy digital meter. 

No more switchingbetween meters for your routine measurements. This  waterproof (iteven floats) meter has a large easy-to- read, dual-level LCD and automaticshut off. 

Includes automatic temperature compensation (ATC) so the meter actually adjusts the readout based on the temperature. This is important for both pH and EC/TDS because otherwise the effects of temperature would have to be calculated manually for accurate results such as with many less expensive meters. 

This technologically advanced tester hasa replaceable pH electrode cartridge with an extendable cloth junctionas well as an EC/TDS graphite electrode that resists contamination bysalts and other substances. This gives the meter a greatly extendedlife. Your tester no longer needs to be thrown away when the pH sensoris exhausted.

The EC/TDS conversion factor is user selectable as wellas the temperature compensation coefficient (ß). Fast, efficient,accurate and portable, the Combo pH, EC/TDS and temperature testerbrings you all the features you've asked for and more.