The latest HI-98103 is the next generation of the original Checker pH tester. Now offering automatic calibration to one or two points, automatic buffer recognition, calibrated buffer tags, stability indicator, low battery indicator, and selectable automatic shut off.

Key features:

pH 0.0 to 14.0; resolution 0.1pH
Replaceable electrode – HI-1271
Economical
High accuracy - ±0.2 pH
Large LCD
Automatic Calibration
Stability Indicator
Automatic shut-off
Long Battery Life – 1000 hours

Bought for a job which never happened so has been opened but not used.