


8100 Plus pH Temperature Meter / 8100 Plus Kit
8100 Plus pH Temperature Meter / 8100 Plus Kit
8100 Plus pH Temperature Meter and optional Kit package
- Robust waterproof case gives IP67 protection
- Manual/automatic temperature compensation
- Simple pH re-calibration
- 2 year guarantee
- Polygiene BioMaster product protection
The 8100 Plus pH meter is a three-in-one instrument that features a large easy to read, LCD display that indicates pH over the range of -2 to 16 pH with a resolution of 0.01 pH, mV over the range of -1000 to 1000 mV and temperature over the range of -39.9 to 149.9 °C with a resolution of 0.1 °C. The LCD display features both low battery indication and an user selectable backlight.
The pH readings are either manually or automatically temperature compensated over the operating range of 0 to 80°C. To automatically compensate, it is necessary to utilise a thermistor temperature probe. Each unit incorporates an auto-power off facility that automatically turns the instrument off after ten minutes, maximising battery life.
The 8100 Plus has an integrated rubber seal to ensure complete water resistance and helps to reduce the possibility of damage in harsh environments.
At the touch of a button, the instrument will automatically re-calibrate (2-point autocal) itself when used in conjunction with pH buffer solutions.
Each unit incorporates an easy to use BNC connector and waterproof Lumberg screw-locking type connector, allowing a wide range of interchangeable thermistor probes to be used. The 8100 Plus pH price excludes electrode & probe.
In order to calibrate this 8100 Plus meter before use, pH7 buffer solution or capsules must be purchased alongside this instrument, plus either a pH4 or pH10 buffer solution or capsules depending on your application. Solutions not required for kit option as supplied with kit.
To add recommended probes and other accessories select your choices from the 'Add Accessories'.
The 8100 Plus pH meter is available as a meter only or as a complete kit which includes:
- 1x 8100 Plus pH meter (225-085)
- 1x Temperature probe (170-100)
- 1x General purpose pH electrode (823-501)
- 1x 4.01 pH buffer solution (816-050)
- 1x 7.00 pH buffer solution (816-051)
- 1x Carrying case (830-080)
Dimensions:
Instrument: 32 x 71 x 141mm, Case (kit only): 220 x 260 x 55mm
Data sheet
| Range: | pH: -2 to 16 pH, mV: ± 1000mV, temperature: -39.9 to 149.9°C |
|---|---|
| Resolution: | pH: 0.01pH, mV: 1mV, temperature: 0.1°C |
| Accuracy: | pH: ±0.02pH, mV: ±1mV, temperature: ±0.4°C (-9.9 to 69.9°C) |
| Battery: | 3 x 1.5 volt AAA |
| Battery Life: | maximum 5 years - 2500 hours |
| Sensor Type: | combination electrode / thermistor |
| Display: | 12mm LCD |
| Backlight: | Yes |
| Dimensions: | Instrument: 32 x 71 x 141mm, Case (kit only): 220 x 260 x 55mm |
| Weight: | 230 grams |
| Case Material: | ABS plastic includes Biomaster product protection |
| Country of Manufacture: | United Kingdom |
| Guarantee: | two years |
| Water/Dust Resistance: | IP67 Protection |
| Measurement Scale: | pH mV and temperature |

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.