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RFID Reader - Serial from Parallax

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Designed in cooperation with Grand Idea Studio, the Parallax Radio Frequency Identification (RFID) Reader Module is the first low-cost solution to read passive RFID transponder tags from up to 4 inches away. The RFID Reader Module can be used in a wide variety of hobbyist and commercial applications, including access control, automatic identification, robotics, navigation, inventory tracking, payment systems, and car immobilization.

This RFID Reader Module (Serial version only) comes with two RFID Card (54mm x 85mm rectangle),


  • Low-cost method for reading passive RFID EM4100 family transponder tags
  • 2400 baud serial interface
  • Enable input allows module to be enabled/disabled by software
  • Bi-color LED for visual indication of status


  • Reads 125 kHz Tags, EM41000 Family
  • Power requirements: 4.5 to 5.5 VDC
  • Communication: Serial at 2400 baud (8N1)
  • Dimensions: 2.45 x 6.25 x 0.22 in (62.2 x 82.5 x 5.57 mm)
  • Operating temp range: -40 to +185 F (-40 to +85 C)
Note: The typical maximum reading range is 2" to 2.5" depending on the tag type, mounting arrangement and environmental conditions. Allow for a maximum distance variance of at least 10% in operation due to variations in tag manufacturing and environmental conditions.

Data Sheet

Quick Facts
Catalog Number:2177
Brand's Part Number:28140
Buy Now: Add To Cart


Stock NumberBuyProduct TitlePriceStatus
2177 Add To CartRFID Reader - Serial$39.99 In Stock
4512 Add To CartRFID Reader USB
More Information
$39.99 In Stock


Image of Sku None RFID Card (54mm x 85mm rectangle) RFID Card (54mm x 85mm rectangle)
Image of Sku None RFID Card (50mm circle) RFID Card (50mm circle)
Image of Sku None RFID Card (25mm circle) RFID Card (25mm circle)

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The content on this page was updated on 03/28/2015