





Hanna Instruments-98100 Checker Plus pH Tester
The easy to use Checker plus is a real favourite with students and researchers due to its clear LCD display and long thin pH electrode. The checker offers automatic calibration and buffer recognition, calibrated buffer tags, stability indicator, low battery indicator and selectable automatic shut off. Ideal for measurements in test tubes and vials.
The Hanna Instruments-98100 Checker Plus provides users with fast and accurate readings from 0 to 14 pH with a resolution of 0.01 pH. The Checker Plus features and easy to read LCD and two-point calibration with automatic buffer recognition.
The Hanna Instruments-1271 pH electrode can be easily replaced. You only need to unscrew the electrode from the meter body and screw on a new one.
Hanna Instruments-98100 is fast, accurate and lightweight. With 1000 hours of battery life, there is no need to worry about frequent battery replacement.
More features:
- Sturdy compact meter designed for direct sample testing
- Fast accurate readings from 0-14 pH with a resolution of 0.01 pH
- Thin long-reach pH electrode designed to fit easily into a test tube
- Replaceable pH electrode
- Economical
- Highly accurate
- Large LCD
- Stability indicator
- Automatic shut-off
- Plastic carry case
- One or Two point automatic calibration is simple to perform. The calibration buffers are automatically recognised and after calibration the buffer values used are shown on the display as a tag.

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.