This waterproof tester offers high accuracy pH, EC/TDS and temperature measurements in a single tester! No more switching between meters for your routine measurements. The waterproof Combo (it even floats) has a large easy-to-read, dual-level LCD and automatic shut-off.  pH and EC/TDS readings are automatically compensated for the effects of temperature (ATC). This technologically advanced tester has a replaceable pH electrode cartridge with an extendable cloth junction as well as an EC/TDS graphite electrode that resists contamination by salts and other substances. This gives these meters a greatly extended life. Your tester no longer needs to be thrown away when the pH sensor is exhausted. The EC/TDS conversion factor is user selectable as is the temperature compensation coefficient (ß). Fast, efficient, accurate and portable, the Combo pH, EC/TDS and temperature tester brings you all the features you've asked for and more!

Specifications

pH Range                            0.00 to 14.00 pH
EC Range                            0 to 3999 µS/cm
TDS Range                          0 to 2000 ppm
Temperature Range          0.0 to 60.0°C / 32 to 140.0°F
pH Resolution                     0.01 pH
EC Resolution                     1 µS/cm
TDS Resolution                   1 ppm
Temperature Resolution   0.1°C / 0.1°F
pH Accuracy                          ±0.05 pH
EC/TDS Accuracy                 ±2% F.S.
Temperature Accuracy        ±0.5°C / ±1°F
Temperature Comp.           pH: automatic; EC/TDS: automatic with ß adjustable from 0.0 to 2.4% / °C
pH Calibration                      automatic, 1 or 2 points with 2 sets of memorized buffers
                                                (pH 4.01 / 7.01 / 10.01 or 4.01 / 6.86 / 9.18)
EC/TDS Calibration             automatic, 1 point
TDS Conversion Factor       adjustable from 0.45 to 1.00
pH Electrode                         replaceable; included
Environment                          0 to 50°C (32 to 122°F); RH max 100%
Battery Type / Life                 4 x 1.5V / approx. 100 hours of continuous use;
                                                 auto-off after 8 minutes of non-use
Dimensions                          163 x 40 x 26 mm (6.4 x 1.6 x 1.0"")
Weight                                    100 g (3.5 oz.)

Supplied with

• pH, EC/TDS/ Temperature Probe with 1m cable
• 4 (1.5V) AAA alkaline batteries 
• Instruction Manual
• Rugged carrying case.