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HI98100 (Checker® Plus pH Tester)

Checker® Plus pH Tester


  • Economical

  • Large LCD

  • Replaceable pH Electrode

  • Automatic Calibration

  • Stability Indicator

  • Automatic Shut-Off

  • Long Battery Life

  • Plastic Carrying Case


Product Description



pH Range                                                                                                                                                                0.00 to 14.00 pH
pH Resolution 0.01 pH
pH Accuracy ±0.2 pH
Calibration automatic, one or two points with three standard buffers available (pH 4.01, 7.01 and 10.01)
Battery Type/Life 1.5V CR2032 (1) / approximately 1000 hours of continuous use
Electrode/Probe HI1271 pH electrode with screw type connector (included)
Environment 0 to 50°C (32 to 122°F); RH max 95%
Dimensions 50 x 174 x 21 mm (2 x 6.8 x 0.9”)
Weight 50 g (1.8 oz.)


The HI98100 Checker Plus pH tester has been designed with many advanced features while maintaining the look and feel of the original Checker. The Checker Plus now offers automatic calibration to one or two points, automatic buffer recognition, calibrated buffer tags, stability indicator, low battery indicator, and selectable automatic shut off. The Checker plus still maintains the iconic pentagon design with a probe that measures 103 mm in length and tapered to a 8 mm diameter making it ideal for test tubes and vials.

Order Information

HI98100 is supplied with HI1271 pH electrode, HI700004 pH 4.01 buffer solution sachet (2), HI700007 pH 7.01 buffer solution sachet (2), HI7000601 electrode cleaning solution sachet (2), instruction manual, instrument quality certificate and plastic carry.