Hanna Instruments-99141 Portable Waterproof pH meter Boilers and Cooling Towers
HI-99141 is a portable, microprocessor-based pH and temperature meter specifically designed for boiler water or cooling tower water measurements. It comes with a HI-729113 probe, a rugged double junction pH electrode with a flat pH sensor and titanium body.
The electrode has a peripheral Teflon® junction for maximum surface contact and the flat pH tip is easy to clean and prevents solids from collecting on the sensor. Chemicals used to minimise scale, corrosion and foaming require an optimum pH. Measuring and controlling water quality helps minimise these effects.
The HI-99141 pH meter is a portable, lightweight meter with two button operation that is simple to use. It is delivered with a rugged pH electrode protected by a titanium body that is perfect for the pH measurement of treated boiler, feed water and steam condensate.
A built-in temperature sensor allows simultaneous temperature compensated pH and temperature readings and an integral pH sensor pre-amplifier provides measurements impervious to noise and electrical interference.
Main features:
- Simultaneous pH and temperature measurements on a large dual-line LCD display
- Automatic pH calibration at one or two points within two memorised buffer sets (standard or NIST)
- Selectable temperature unit (°C)
- Electrode condition indicator
- mV of pH measurement for electrode check
- HI-729113 dedicated pH with integral temperature sensor
- Probe quick connect system
- Battery life indication and low battery detection
- Keystroke confirmation tone
- Auto-off function
- Waterproof casing IP67
Each meter is supplied with:
- HI-729113 pre-amplified pH probe with built-in temperature sensor and matching pin, DIN Connector with 1m cable
- pH 4.01 and 7.01 buffer sachet
- HI-700601 Electrode cleaning solution (2 sachets)
- 100 ml beaker
- Alkaline batteries: 1.5V AAA x 3
- Rugged carrying case
- Calibration certificate of meter
- Calibration certificate of probe
- Instruction manual
Available to buy separately:
Protective rubber boot
- HI-710028 Orange
- HI-710029 Blue
- HI-710030 Green
Specification
| pH Range | -2.00 to 16.00 pH | |
| Temperature Range | -5.0 to 105.0°C | |
| mV | ±825 mV (pH-mV) | |
| pH Resolution | 0.01 pH | |
| Temperature Resolution | 0.1°C | |
| mV Resolution | 1 mV | |
| pH Accuracy @ 30°C | ±0.02 pH | |
| Temperature Accuracy @ 20°C | ±0.5°C | |
| mV Accuracy @ 20°C | ±1 mV (pH-mV) | |
| pH Electrode | HI-729113 pre-amplified pH titanium-bodied probe with built-in temperature sensor, with Quick Connect DIN connector and 1 m (3.3') cable (included); please note: HI-729113 is limited to be used from 0 to 13 pH and from 0 to 80°C | |
| Battery Type / Life | 3 x 1.5V AAA / approx. 1400 hours of continuous use | |
| Environment | 0 to 50°C (32 to 122°F); RH max 100% | |
| Dimensions | 154 x 63 x 30 mm | |
| Weight | 196 g | |
| Case Protection Rating | IP67 |
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.