Proxygrind RFID Field Detector Keychain 125kHz & 13.56MHz LF/HF Access Control Tester

Pocket-sized RFID field detection for access control testing, hardware debugging, and security research.

The STS Collective RFID Field Detector Keychain is a compact, battery-free tool designed to quickly detect the presence of common RFID reader fields. It supports both Low Frequency 125kHz and High Frequency 13.56MHz fields, making it useful for identifying whether an access control reader, RFID module, or NFC-style reader is actively transmitting.

Unlike powered RFID tools, this detector does not read, copy, emulate, or store card data. It simply lights up when placed near an active RFID field, helping you quickly confirm reader activity and determine whether the field is LF or HF.

It is small enough to keep on a keyring, lanyard, toolkit, or EDC pouch, making it a practical everyday tool for security professionals, access control installers, makers, and hardware developers.

Features:

• Detects common 125kHz LF RFID fields
• Detects common 13.56MHz HF RFID / NFC fields
• Passive design, no battery required
• LED field indicator
• Keychain-sized for easy carry
• Useful for access control troubleshooting
• Helpful for pentesting reconnaissance and authorized security assessments
• Great for RFID reader placement, field verification, and hardware debugging
• Does not read, clone, emulate, or capture RFID credentials

Common uses:

• Confirm whether an access control reader is active
• Identify whether a reader is using LF or HF RFID
• Troubleshoot RFID/NFC modules during development
• Verify reader field location and orientation
• Add a lightweight RFID detection tool to your everyday security kit
• Perform authorized physical security assessments

Important use notice:
This tool is intended for authorized testing, troubleshooting, education, and development only. It does not bypass access control systems, recover credentials, clone badges, or provide unauthorized access.

What’s included:

• 1x RFID Field Detector Keychain