Compatible with Onity
Onity-compatible cards & key fobs
Security ID Systems supplies compatible replacement credentials for 3 Onity formats, encoded by specification to read identically on your existing Onity equipment. A fraction of OEM pricing — and we are not affiliated with Onity.
Compatible Onity formats (3)
Onity Ultralight C (security-upgraded)
Compatible with Onity
- Chip
- Genuine NXP MIFARE Ultralight C
- Format
- Onity encoding on Ultralight C; 3DES (securi…
Onity HT24 / Advance / Trillium (Mifare Classic 1K)
Compatible with Onity
- Chip
- Genuine NXP MIFARE Ultralight / Classic 1K
- Format
- Onity proprietary sector encoding on Mifare …
Onity (HT24 / Advance / Trillium / DirectKey)
Compatible with Onity
- Chip
- Genuine NXP MIFARE Classic 1K
- Format
- Proprietary Onity sector encoding on MIFARE …
Onity credentials span
Onity and all other brand and product names are trademarks of their respective owners. Security ID Systems is an independent manufacturer and supplier of compatible access-control credentials and is not affiliated with, authorized by, sponsored by, or endorsed by these companies. Brand and format names are used only to identify the systems our products are compatible with. MIFARE and DESFire are registered trademarks of NXP B.V.
Onity compatibles — common questions
Are these genuine Onity cards?
No — every credential is an independently manufactured compatible product, not an Onity-branded one. Security ID Systems is independent and is not affiliated with, authorized by, or endorsed by Onity. Our cards are engineered by specification to read identically on Onity readers.
Which Onity formats can you supply compatibles for?
We currently document 3 compatible Onity formats. If your exact Onity format isn't listed, send the part number or a sample — we cover more than we publish.
Will a compatible card work in my existing Onity system?
Yes, when encoded correctly. We match the frequency, data structure and — where applicable — your facility code and card-number range, so the credential presents exactly what your readers expect. We confirm compatibility before production.
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Need a compatible Onity credential?
Send the part number printed on your card or a photo of the reader. We confirm compatibility before you order — and we cover the specialist formats nobody else lists.