Offset Security designs and manufactures RFID and NFC readers purpose-built for modern access control. Our Sentinel reader family supports Apple Wallet, Google Wallet, and legacy credential technologies through a single platform.
Four models covering every deployment scenario, from compact mullion-mount readers to full-size keypads for high-security areas.
Sentinel S100
Slim mullion-mount reader with NFC, BLE, and Apple ECP support. Fits single-gang and mullion installations.
View SpecsSentinel S100K
All the capabilities of the S100 with an integrated 12-key backlit keypad for PIN-based multi-factor authentication.
View SpecsSentinel S200
Full-size reader with 13.56 MHz NFC, 125 kHz legacy support, BLE, and Apple ECP. Single-gang box mount.
View SpecsSentinel S200K
Enterprise-grade multi-technology reader with integrated keypad. Supports NFC, 125 kHz, BLE, and Apple ECP.
View SpecsEvery Sentinel reader ships with the protocols and credential technologies that access control integrators need today and tomorrow.
Native ECP support lets users tap an iPhone or Apple Watch to present credentials stored in Apple Wallet without opening an app.
AES-128 encrypted communication between reader and controller. Meets SIA OSDP v2 requirements for tamper-resistant, bidirectional data exchange.
BLE 5.0 enables mobile credential presentation from smartphones at configurable read ranges, supporting both Apple and Android platforms.
13.56 MHz (ISO 14443A/B, ISO 15693, MIFARE, DESFire) and 125 kHz (HID Prox, EM4100, AWID) on S200 models for phased migration.
Technical datasheets and product documentation for the Sentinel reader family.
Full specifications for S100, S100K, S200, S200K models
Dimensions, electrical, environmental, and credential compatibility
Mounting, wiring diagrams, and OSDP/Wiegand configuration
Sentinel readers are designed and tested to meet the standards required for commercial access control deployments.