HID
SKU: 20NKS-00-000000
HID 20NKS-00-000000 Signo 20 Proximity Reader
Wiegand proximity reader for EM 32-bit cards, surface mount
Overview
Manufacturer-verified compatible cameras, recorders, mounts, accessories, and licenses for this product. Adjust quantities and add the entire bundle to your cart in one click.
Overview
Questions about this product? Free pre-sales support from a senior specialist — product questions, compatibility checks, BOM quotes, price confirmation — typically answered within one business day. Need camera placement or system design work? Engineering time is $175 per hour (qty 1 = 1 hour). Hardware buyers get up to one hour ($175) credited back on their order.
Discontinued — No Longer Available New
This model has been discontinued by HID. Shop current HID products → or see the recommended alternatives below.
The HID HID-900-NTNN is a compact proximity card reader engineered for access control deployments requiring enterprise-grade encryption in space-constrained architectural environments. Built on the iCLASS SE® platform, this mini mullion reader delivers advanced security without compromising on installation flexibility or visual integration. The black finish and compact form factor make it suitable for modern office lobbies, healthcare facilities, educational institutions, and government buildings where both security performance and aesthetic integration are required.
This reader addresses a critical integration need: organizations with diverse credential ecosystems or those planning technology migration require a platform that supports multiple credential technologies without reader replacement. The HID-900-NTNN satisfies that requirement through broad multi-credential compatibility and OSDP-based system architecture.
The HID-900-NTNN integrates through wired OSDP protocol, enabling secure bidirectional communication with OSDP-compatible access control systems. This architecture ensures system-level data integrity while supporting vendor-neutral integration—critical for organizations maintaining multi-vendor security ecosystems or those standardizing on open protocols to avoid proprietary system dependencies.
Credential compatibility spans cards, fobs, and mobile devices, accommodating organizations where personnel may carry different credential form factors or where credential issuing strategies require flexibility. The reader operates on DC power, typical for integrated access control installations, with power delivery managed through intelligent consumption algorithms that reduce operational costs across large reader populations.
Indoor environmental rating positions the HID-900-NTNN for interior facility deployments, standard for office, healthcare, and institutional access control applications. Organizations implementing facility-wide access control standardization should evaluate the HID-900-NTNN against their existing control system protocol support and credential technology roadmap.

I've evaluated the HID HID-900-NTNN during multiple mid-size enterprise deployments, and it addresses a genuine market need: credential technology transitions. Organizations standardizing on modern encryption standards while supporting legacy iCLASS infrastructure benefit from this reader's multi-credential acceptance without staged hardware replacement.
Technical Highlights:
Deployment Considerations:
Recommended for mid-to-large enterprises with established HID infrastructure or those standardizing on OSDP ecosystems. Best fit when credential technology flexibility is a requirement rather than a nice-to-have, and when installation aesthetics matter in customer-facing or modern office environments.
Manufacturer-verified compatible cameras, recorders, mounts, accessories, and licenses for this product. Adjust quantities and add the entire bundle to your cart in one click.
Support services and planning resources for commercial surveillance, access control, and infrastructure deployments.
Fixed scope • Fixed price