
Hanna Instruments-9142 Simple-to-Use Dissolved Oxygen Meter
Water resistant, simple to use and calibrate and supplied complete with a Dissolved Oxygen probe with a 4m cable, this meter will measure and display Dissoved Oxygen from 0.0 to 19.9mg/L with 0.1mg/L resolution.
The ever increasing demand for instant on-site analysis results has created a need for innovative and rugged portable, waterproof meters. The Hanna Instruments-9142 is a simple to use DO meter with Polarographic probe.
Field work can subject instrumentation to the inclemency of weather. Cold, rain, dust and humidity can cause condensation to breech the housing. The water resistant housing of Hanna Instruments-9142 solves many of the problems of field use.
Calibration is performed with Hanna Instruments-7040 zero oxygen solution, while 100% calibration is done in air.
The Polarographic probe (Hanna Instruments-76407/4) is accurate to 0.3 ppm and is supplied with a 4 m cable that allows measurements to be taken even in hard to reach places.
Key features
- Automatic Temperature Compensation
- Affordable and efficient
- DO probe and carrying case included
Order information
The Hanna Instruments-9142 is supplied with the following:
- Hanna Instruments-76407/4 probe with 4 m cable
- 2 spare membranes
- Hanna Instruments-7041S electrolyte solution (30 mL)
- Calibration screwdriver
- Batteries
- Instructions
- Rugged carrying case

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.