The STid Arc One Mullion is the kind of reader that earns its place in high-security installations without demanding attention. Designed specifically for tight mounting environments — door frames, narrow mullions, constrained recesses — it fits where most readers simply won't, while still delivering the performance that matters. Operating at 13.56 MHz, it supports MIFARE®, DESFire®, and Bluetooth credentials, giving you flexibility across a range of access control architectures without compromising on security.

With a reading range of up to 6 cm and weatherproof, impact-resistant construction, this is a reader built to perform reliably in real-world conditions — whether that's a busy entrance lobby or an exposed external doorway. The waterproof electronics mean the elements aren't a concern, and the compact form factor means the installation constraints that rule out larger readers simply don't apply here.

For integrators and facilities managers specifying access control across multi-site or high-security environments, the Arc One Mullion offers a well-considered solution where space is limited but standards aren't. Manufacturer part number: ARC1-R31-B/PH5-3i/1.