Card reader | 7 MIN | 30/11/2022

Long-range RFID readers: what are they, how do they work, and which is the best?

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The technology used in long-range RFID readers has had a long evolution. It originated as a large-scale system, used during World War II, as a mechanism for the identification of aircraft and ships in the military field.

In the 1950s and 1960s, multiple scientific contributions were made to extend its applications, such as to use in anti-theft systems at the exit of stores, detecting objects from a long distance.

In the 1980s long-range RFID readers were first tested in the field of traffic management, with application in tolls, vehicles, and railways.

This radio frequency identification system continued its evolution, both in its data transfer capacity and in its reading range, leading to the design of ultra-long-range RFID readers.   


Long-range RFID readers

A remote identification system is made up of a long-range RFID reader and some tags or cards, which communicate with each other using radio frequency to enable or deny access depending on the permissions contained on the card. 




The long-distance RFID (Radio Frequency Identification) system is an access control system with great advantages. A very common application is to manage vehicle access to the parking lot of a company, building, or home. It provides great security and comfort because it allows you to access the parking lot without having to stop the car or roll down the window.

It also offers maximum comfort in pedestrian access controls, because it facilitates access for people with reduced mobility. Just by wearing a badge, the reader will detect the card, identify it and allow access.. sky_ID_movilidad_reducida


Learn more about the trends in security and access control for 2022 with NÜO Planet.




How do RFID readers work?

Regardless of the frequency at which they operate (low, high, ultra-high) RFID readers emit a signal and then iinterpret the response sent by the tag. So, its operation can be explained in 2 important steps :

  • The message is created. To start communication with the tag, the first phase of communication is for the reader to create a signal, which is emitted through the RFID antenna, according to the characteristics of the system.
    • If the system is HF (high frequency), the signal is emitted by an electromagnetic field.
    • If the system is UHF (ultra high frequency), the signal is sent in the form of waves.
  • The response is interpreted. In the second phase of operation, the tag must respond to the signal. This response is captured and interpreted by the reader, allowing access based on permissions.


Types of long-range RFID reader systems

Three types of systems with RFID readers can be distinguished, according to the frequency band in which they operate: low frequency (LF), high frequency (HF and NFC), and ultra-high frequency (UHF).

Low frequency (LF) (LF) RFID

A low frequency RFID reader system has a short read range (approx. 10 cm) and a low read rate. It normally operates at frequencies 125 KHz or 134 KHz, but its band covers a range between 30 KHz and 300 KHz. In addition, it is characterized by:

  • Offering easy readout in liquid environments or when implanted under the tissue of live animals (animal control).
  • Reliable performance in hostile environments, such as dusty or humid environments.
  • Having no restrictions in its line of sight, being able to read through any solid material other than metal, such as concrete or wood.

High Frequency (HF) RFID

High frequency RFID reader systems have a greater reading range, up to 1m. Their band range is between 3 MHz and 30 MHz, although they generally operate at the 13.56 MHz frequency.

In addition:

  • They have a moderate sensitivity to electromagnetic interference.
  • They have a longer read range when in environments with little or no interference.
  •  They transmit data in a shorter time.
  • They are widely used for ticketing and data transfer.

At this high frequency, NFC (Near Communication Field) tags work, which have a very short reading range, requiring extremely proximity or even contact.

Ultra-High Frequency (UHF) RFID

A system with a long-range UHF RFID reader is also available, which can read at greater distances, of up to several meters. It is found in a frequency range between 300 MHz and 3 GHz. These systems are characterized by a very high data transmission speed.

  • Widely used in applications related to traffic and vehicle passage control due to its comfort and efficiency. 



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NÜO Planet Long Range RFID (UHF) Reader

NÜO ID is the NÜO Planet solution that offers high security and convenience to remotely identify both pedestrians and vehicles, using the latest generation long-range UHF RFID readers.

These readers are highly resistant to impact and environmental agents. Designed for operation in any environment. They can be wall-mounted, ceiling-mounted, or ground-mounted using an aluminum column.




The NÜO ID system is perfect for parking in companies, in luxury residences, and in industries, for greater efficiency in fleet management and in marinas. With this solution, access becomes a comfortable and very fast process, with no requirement to get out of the car, or even to stop the car - not even the need to move a single finger.


NÜO ID readers have the ability to detect cards inside the vehicle at a distance of 10 m and emit a signal to open the gate.

It is a versatile system, which has a mixed card, including a UHF card and a high security MIFARE Plus card. You can use the same card to access the parking lot, and then to open other door readers or turnstiles to enter the building.


Are you looking for the best long-range RFID reader system for your company or home? Reach out to us, en NÜO Planet te ayudamos a seleccionar el control de accesos que más se adecúe a tus necesidades de comodidad y seguridad.

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Escrito por:   NÜO Planet

Categorías:   Card reader, Engineering