Geovision 81-EK125-101 EM4100 125kHz RFID Tag

Overview

The Geovision 81-EK125-101 is a passive EM4100 RFID tag operating at 125kHz—the standard frequency for legacy and modern access control readers. Unlike active tags (which drain batteries), this passive design requires no power source on the credential itself, making it ideal for high-volume badge programs, visitor credentials, and cost-sensitive multi-facility deployments where you're issuing hundreds or thousands of credentials across multiple entry points.

Compatibility

The 81-EK125-101 integrates with Geovision access control systems and any third-party reader supporting EM4100 chip protocol at 125kHz. Standard 125kHz readers found in legacy systems and modern hybrid installations recognize this tag without requiring firmware updates or reader reconfiguration. If your facility is running mixed-brand access panels, confirm your reader's EM4100 support before ordering in volume.

Installation Notes

No installation required on the tag itself—simply program the EM4100 chip to your access control system's credential database using your existing enrollment workflow. Passive tags have no range limitation beyond your reader's detection distance (typically 2–6 inches depending on reader design). Store tags away from strong magnetic fields during inventory to avoid potential interference during programming.