Skip to content 
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 3DES memory card (security-upgraded)
Compatible with Onity
- Chip
- 13.56 MHz ISO 14443-A memory card
- Format
- Onity encoding on 3DES memory card; 3DES (se…
Onity HT24 / Advance / Trillium (1K contactless smart card)
Compatible with Onity
- Chip
- 13.56 MHz ISO 14443-A memory card / 1K contactless smart card
- Format
- Onity proprietary sector encoding on a 1K co…
Onity (HT24 / Advance / Trillium / DirectKey)
Compatible with Onity
- Chip
- 1K contactless smart card
- Format
- Proprietary Onity sector encoding on a 1K co…
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.
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.
Request a quote
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.