
Hanna Instruments-98128 Pocket pHep5 Water Resistant pH Tester
Water resistant, accurate and portable, this handy little pocket meter is a 'go anywhere' pH tester with replaceable electrode. Also designed to float if accidentally dropped into a tank etc.
The meter also features the Hanna Instruments-73127 replaceable electrode with a stainless steel round connector and extendable cloth junction. Replacing is easy due to no pins to line up.
The Hanna Instruments-98128 has a dual LCD screen that displays pH and temperature readings simultaneously. The exposed temperature sensor provides fast response time and the replaceable pH electrode helps to prolong the life of the meter.
This pocket pH tester is easy to use with a two button operation and offers 0.01 pH resolution and +/- 0.05 pH accuracy.
Main benefits
- Automatic buffer recognition and calibration
- Robust, replaceable electrodes
- Proximity of exposed temperature sensor to pH electrode guarantees greater accuracy in temperature compensated readings
- Calibrate directly with Hanna buffer solution sachets
- Battery % displayed on start up with battery error prevention system (BEPS) to support
Supplied with
- Hanna Instruments-73127 pH electrode
- Hanna Instruments-73128 electrode removal tool
- Batteries and instructions

Frequently Asked Questions
Clear answers to help you choose the right water testing solution with confidence
Which brands of water testing kits do you supply?
Do you provide kits for both home and professional use?
Yes — whether you’re a pool or spa owner, aquarium keeper, utility company, or a university laboratory, we have the right solution for your needs.
Can I arrange servicing or calibration for my photometer?
Absolutely. We also provide servicing and calibration to keep your photometers accurate and reliable.
How quickly do you dispatch orders?
Orders placed before 2:30 pm (Monday–Friday) are dispatched the same day. We also ship on Saturdays for your convenience.
Which couriers do you use for delivery?
We deliver through UPS, DPD, and Royal Mail. You can also choose to upgrade to next-day delivery at checkout.
What is your return policy?
We accept returns within 14 days of delivery provided the items are unused, in their original packaging, and in resalable condition. Please contact our team before returning any items.
Can I place bulk or business orders?
Yes, we welcome bulk, trade, and institutional orders. For tailored pricing or large quantities, please get in touch with us directly.
How can I get help if I’m unsure which kit to buy?
You can call us at 📞 +44 (0)115888 2726 and our team will guide you in choosing the most suitable kit for your needs.