RFID Field Detector can be used to identify the presence of an rfid field. You can easily identify the frequency and unknown reader is operating at.

It supports

  • 13.56mhz high frequency or nfc reader
  • 125khz low frequency reader


  • Detects the presence of a #RFID field
  • Measure #reader duty cycle
  • Differentiate between 13.56MHz HF/NFC & 125kHz LF RFID #readers
  • Form factor that fits in your wallet!

When you push it nearby the RFID reader (125kHz), it shows the green LED

The detector will turn on red LED for high frequency reader.

Last Updated:
Contributors: yanc