Manual for the. HI 98121: Water Ionizer applications e-mail: sales@hannainst.com The HI 98121 is a portable tester that measures both pH and ORP. HI98121is a compact pH, ORP and temperature tester. It features a two- buttons operation system and is easy to use. The compact and waterproof casing is Hanna Instruments HI 98121 Combination pH/ORP/Temperature Tester: Science Lab One- or two-point manual pH calibration for obtaining results across aHanna Instruments reserves the right to modify the design, con- Instruction Manual. HI 98121. Waterproof pH / ORP &. Temperature Meter. View and Download Hanna Instruments HI 98121 instruction manual online. Waterproof pH / ORP & Temperature Meter. HI 98121 thermometer pdf manual download. The HI98121 is a reliable, waterproof tester that ensures quick and easy measurements of both pH and ORP. This accurate pH and ORP tester features 0.01 pH Hanna Instruments HI 98121 Instruction Manuals and User Guides. We have 1 Instruction Manual and User Guide for HI 98121 Hanna Instruments. Do you have any questions? Further products by HANNA Instruments Inc. Available downloads: Download HI98121 MANUAL. Evaluations 0. Read, write