
Hanna Instruments HI-98309 Water Purity Tester UPW
HI-98309 Water Purity Tester - Ultra Pure Water
The HI-98309 uses a conductometric measurement to determine the purity of water.
The HI-98309 Ultra Pure Water (UPW) is an ideal tester for high purity water, which has less conductivity.
UPW is the first pure water tester to measure in 1/1000ths of micro-Siemens (μS) and provides fast spot checks for minute traces of water contamination.
These testers are housed in a durable casing that provides excellent protection against harsh industrial environments.
Water resistant to IP65 these pocket testers can withstand being dropped accidentally into a liquid and are designed to float to aid retrieval, particularly useful when taking the measurement of a large body of water such as lakes or pools. They are not designed for full submersion and if you need a meter which can withstand immersion then please look for IP67 and IP68 rated meters in our range. However, for everyday use the IP65 rated Hanna pocket testers are well able to cope with wet and humid environments, passing rain showers when used outside and as we say, even an accidental dunking or two.
Specifications
| EC Range | 0.000 to 1.999 µS/cm |
| Resolution | 0.001 µS/cm |
| Accuracy | ±2% F.S. |
| Calibration | Factory calibrated |
| Temperature Compensation | automatic, 0 to 50°C with β=2%/˚C typical |
| Battery Type / Life | 4 x 1.5V / approx. 120 hours of continuous use |
| Environment | 0 to 50°C (32 to 122°F); RH max 95% non condensing |
| Dimensions | 175 x 41 x 23 mm (6.9 x 1.6 x 0.9") |
| Weight | 95 g (3.4 oz.) |
| Ordering information | HI-98309 is supplied with protective cap, 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.