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Combo - Waterproof pH / EC / TDS / °C / °F Testers with Replaceable Electrode

  • Rugged, Floating Waterproof Casing.
  • Temperature in °C and °F.
  • Measurement Stability Indicator.
  • Replaceable pH Electrode Featuring an Extendable Junction.
  • Automatic pH Calibration at standard as well as NIST Buffer Sets.
  • Automatic Temperature Compensation (ATC).
  • Adjustable Temperature Coefficient Factor.
  • Specifications

The new waterproof HI 98129 & HI 98130 Combo testers from Hanna are designed for 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. At startup, Combo performs a self check then displays the remaining battery level to assure proper working condition. These testers also have a stability indicator and hold feature to prompt the user when to take the reading & freeze the display for easy and accurate recording. Calibration and temperature compensation is automatic, while the EC / TDS conversion factor and temperature coefficient factor (ß) are user adjustable for application specific measurements. For calibration in pH, the user may choose between standard or N.I.S.T. buffer sets. The combo has a replaceable pH electrode cartridge with an extendable cloth junction as well as an EC/TDS graphite electrode which resists contamination by salts and other substances that come in contact with the electrode. These new pH / EC / TDS / Temperature meters have a stainless steel temperature probe for faster and more precise temperature measurement. Fast, efficient, accurate and portable, the Combo pH, EC/TDS and temperature tester meets the requirements of your routine multi-measurements.

Extendable Junction
Replaceable pH electrode cartridge
featuring an extendable junction.

Choose your Combo according to the proper EC / TDS ranges for your application:

  • HI 98129; EC - 0 to 3999 µS/cm; TDS - 0 to 2000 ppm
  • HI 98130; EC - 0.00 to 20.00 mS/cm; TDS - 0.00 to 10.00 ppt

Combo is supplied complete with HI 73127 pH electrode, 4 x 1.5V batteries and electrode replacement tool (HI 73128).


Specifications:   HI 98129 HI 98130
Range EC 0 to 3999 µS/cm 0.00 to 20.00 mS/cm
  TDS 0 to 2000 ppm 0.00 to 10.00 ppt
  pH 0.00 to 14.00 pH
Temperature 0.0 to 60.0 °C or 32.0 to 140.0 °F
Resolution EC 1 µS/cm 0.01 mS/cm
  TDS 1 ppm 0.01 ppt
  pH 0.01
  Temperature 0.1 °C or 0.1 °F
Accuracy (@ 20°C/68°F) EC/TDS ±2% F.S.
  pH ±0.05
  Temperature ±0.5 °C or ±1 °F
Typical EMC Deviation EC/TDS ±2% F.S.
  pH ±0.02
  Temperature ±1 °C or ±1 °F
Calibration EC/TDS Automatic at 1 point
  pH 1 or 2 points with 2 sets of memorized buffers:
(pH 4.01, 7.01 & 10.01 or 4.01, 8.68 & 9.18)
Temperature Compensation EC/TDS BETA (ß) = adjustable from 0.0 to 2.4 per °C in increments of 0.1
  pH Automatic
EC / TDS Conversion Factor Adjustable from 0.45 to 1.00
Environment   0 to 50°C (32 to 122°F); R.H. 100%
Battery Type / Life 4 x 1.5V / 100 hours
Auto Shut-off   After 8 minutes
Dimensions 163 x 40 x 26 mm (6.4 x 1.6 x 1.0")
Weight   85 g (3 oz.)

Miller Analytical | 3158 Fairway Ave | Bristol | PA | 19007
Toll Free: (877) 264-2288 | Fax: (215) 781-9993