Hanna Instruments-7871/220 Mini Level Controller, control relay: high and low, 220V
Mini Level Controller, control relay: high and low, 220, 240V
These easy-to-use controllers are ideal for nearly any liquid level application, such as industrial and municipal water treatment, nutrient tank control in farming, hydroponics, aquaculture applications and plating rinse baths.
Hanna Instruments-7871 includes an overflow alarm and can be connected to a 2-wire transmitter, which is ideal for level monitoring in remote applications.
A complete liquid level measuring system requires:
- Controller (Hanna Instruments-7871)
- bar holder with amplifier circuitry (Hanna Instruments-7874)
- Measuring bars (Hanna Instruments-731324)
- Undecal connector (Hanna Instruments-7164)
Hanna Instruments-7871 requires four bars with the additional bar used for overflow measurement.
Order Information:
The Hanna Instruments-7871 is supplied with mounting brackets 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.