Hanna Instruments HI-8424 Handheld Water Resistant pH Meter with pH electrode and probe
One of the most popular pH meters on the market, this splashproof, portable meter delivers fast, accurate pH, ORP and temperature measurements.
Not only does it offer a 0.01 pH resolution across the pH scale, but it is also easy to use without constant reference to an instruction manual.
Calibration is automatic at one or two points with three memorised buffer values - pH 4.01, 7.01, 10.01.
Once the instrument has been calibrated, the buffer values used during calibration are displayed with tags on the display screen. This keeps users informed of the current calibration and helps to avoid taking measurements that are out of range.
Key features
- Robust splashproof casing
- Clear LCD display with low battery indicator
- Keyboard sealed against water & dirt
- HOLD function freezes readings for ease of recording
- Calibration, temperature compensation and buffer recognition are all automatic
- Three standard buffer values
- Calibration tags on LCD
- Auto shut-off
Supplied with
- HI-1230B pH electrode
- HI-7662 temperature probe
- HI-70004 pH 4.01 buffer solution sachets
- HI-70007 pH 7.01 buffer solution sachets
- HI-700661 electrode cleaning solution sachets x 2
- Battery, protective case and instructions
Want to test Redox/ORP?
Purchase part number HI-3230B Redox/ORP probe to obtain Redox/ORP readings in the mV range.
Specifications
| Range | mV | ±699.9 mV; ±1999 mV |
| Range | Temperature | -20.0 to 120.0°C / -4.0 to 248.0°F |
| Resolution | pH | 0.01 pH |
| Resolution | mV | 0.1 mV; 1 mV |
| Resolution | Temperature | 0.1°C / 0.1°F |
| Accuracy | pH | ±0.01 pH |
| Accuracy | mV | ±0.2 mV; ±1 mV |
| Accuracy | Temperature | ±0.4°C / ±0.8°F |
| pH Calibration | automatic, 1 or 2 point with 3 memorized buffer values (4.01, 7.01, 10.01) | |
| pH Calibration | Offset Calibration | ±1 pH |
| pH Calibration | Slope Calibration | 75 to 110% |
| Input Impedance | 1012 Ohm | |
| Temperature Compensation | Automatic, -20 to 120°C (-4 to 248°F) or manual without temperature probe | |
| pH Electrode | HI 1230B, double junction, gel filled PEI (PolyEther-Imide) body, BNC connector, 1 m (3.3') cable (included) | |
| Temperature Probe | HI 7662 with 1 m (3.3') cable (included) | |
| Battery Type / Life | 1 x 9V / approx. 150 hours of continuous use; auto-off after 20 minutes of non-use or disabled (user-selectable) | |
| Environment | 0 to 50°C (32 to 122°F); RH max 100% | |
| Dimensions | 164 x 76 x 45 mm (6.5 x 3.0 x 1.8") | |
| Weight | 180 g (6.3 oz.) |
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.