Hanna HI98107 pHep Pocket pH Tester is a Hanna-branded product in the ownkoi catalog. Pocket-format digital pH meter from Hanna Instruments. Manufacturer specifications cite a 0.1 pH resolution and includes a calibration solution starter pack. Specifications and pricing reflect the manufacturer-published or retailer-published data at the most recent catalog refresh. Verify the live listing on the source retailer page before purchase.