Lovibond Red, Yellow, Neutral Filter Set (Fx)
A set of ten glass conformance filters for checking Model Fx instruments in Lovibond RYBN scale.
Conformance filters are assigned a nominal value and the company always endeavours to match this value as closely as possible. On occasion, because of the unique manner of the glass making process, it may not be possible to match the requested values exactly. The values achieved and the performance tolerances expected will, of course, always be reported.
| Glass Standard Values | Approximate Values
|
- Lovibond RYBN 0.1R 0.5Y 0.0N filter
- Lovibond RYBN 0.5R 1.3Y 0.1N filter
- Lovibond RYBN 1.0R 2.6Y 0.1N filter
- Lovibond RYBN 1.3R 3.3Y 0.5N filter
- Lovibond RYBN 2.0R 5.7Y 0.1N filter
- Lovibond RYBN 2.5R 8.6Y 0.1N filter
- Lovibond RYBN 3.2R 15.0Y 0.1N filter
- Lovibond RYBN 4.0R 22.0Y 0.1N filter
- Lovibond RYBN 5.0R 34.0Y 0.1N filter
- Lovibond RYBN 7.1R 51.0Y 0.5N filter
- Certificate of Conformity
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.