D.O RFID TAG company
D.O RFID TAG company is a RFID card manufacturers & factory, professional RFID card manufacturers , NFC tags suppliers and RFID Wristband company in shenzhen china for 15 years — Source Quality Products and Enjoy Efficient Service.

RFID reader writer

What is RFID reader writer ?

RFID reader writers can be used as independent devices, much like a bar code scanner, or mounted inside of a device where they can sense the presence of a query or write information to the RFID tag. The RFID tag can either consist of a disposable card or can be a placed into the disposable accessory. Many mobile devices contain RFID reader/writer systems, allowing a mobile device to either check the status or query the disposable or device tag.

Firstly, RFID stands for Radio-Frequency Identification. This is a system that uses radio waves to identify a person, object, or animal uniquely. Basically, the RFID system comprises three components: a computing platform, an RFID card reader writer, and the RFID tag. Additional systems can, of course, be added depending on the application scenario.

All RFID cards or tags have two components: (A) an RFID chip that stores a unique identification number and (B) a coil of wire which acts as an antenna.

The passive RFID cards do not have a source of power, RFID reader writer can write all information to RFID card.

All passive RFID cards have a microchip and a coil of wire which acts as an antenna. An electromagnetic wave created by the RFID module induces a small current in the coils of the card. Thus, the antenna becomes the source of power for the RFID card. This current is sufficient to wake up the microchip. After that, the unique pre-programmed identifier is transmitted wirelessly to the reader.

In short, an RFID card reader writer is an electronic device that we use to read information from the RFID card. We can also use the same device to write identification information to RFID cards or tags.

However, this only works at short distances and when the card and the reader are operating at the same frequency.

RFID reader writer frequency:

There are three main types of RFID frequency: low frequency (LF), high frequency (HF), and ultra-high frequency (UHF).

Low-frequency card reader writer (typical 125khz and 134.2khz): These range from 30 kHz to 500 KHz, though the typical frequency is 125 kHz. LF RFID has short transmission ranges, generally anywhere from a few inches to less than six feet.

High-frequency (13.56mhz)card reader writer : These range from 3 MHz to 30 MHz, with the typical HF frequency being 13.56 MHz. The standard range is anywhere from a few inches to several feet.

UHF RFID reader writer:These range from 300 MHz to 960 MHz, with the typical frequency of 860-960 MHz(Frequencies vary greatly by country and region), and can generally be read from 25-plus meters away.The RFID frequency used will depend on the RFID application.

RFID reader writer ISO Stanard :

Beside the frequency, the passive RFID card reader writer will comply different ISO stanard.

ISO 11784/11785 RFID reader writer –  Animal identification. Uses 134.2 kHz.

ISO/IEC 14443 RFID reader writer : This standard is a popular HF (13.56 MHz) standard,The Near Field Communication standard that lets mobile devices act as RFID readers/transponders is also based on ISO/IEC 14443.

ISO/IEC 15693 RFID card reader writer : This is also a popular HF (13.56 MHz) standard,it widely used for non-contact smart payment and credit cards.

ISO/IEC 18000 UHF RFID reader writer : It with long read distance and  identification for item management.

RFID reader writer application :

Access control

Inventory management

Asset tracking

Animal tracking

Personnel tracking

ID Badging


Loyalty Managment




Security and access control




DO RFID Group have owened RFID reader factory, DO RFID reader manufacturer primarily designed as a professional tool for IT companies and individuals engaged in RFID  solution development.

we produced the RFID readwe write in desktop type, fixed type, handheld type. All RFID reader writer comes with free SDK source code examples, cross-platform libraries, upgradeable firmware, and well-documented API and communication protocol.

Each RFID card reader writer with different interface :USB, RS232,Weigaind, Bluetooth.

Pleaes kindly see below more RFID reader writer and contact us for price.

RFID Products