While the RFID cards in the market have already recorded a high upsurge of numbers, and almost every RFID chip card Manufacturer produces new cards. As a result, it has become increasingly difficult to find a cost-effective tag that delivers on user’s needs. 

rfid card for door

Here are several aspects and criteria to consider when choosing an RFID card as follows:

Factors of Choosing a RFID Card?

Operating Frequency

For all HF, UHF or LF, the RFID means Radio Frequency Identification. All RFID cards types operate within either of the three electromagnetic spectrum bands. This bands includes the High Frequency (HF), Low Frequency (LF), and Ultrahigh Frequency (UHF). 

The general rule is that as the data processing speeds and operating frequencies increases, it results in the increase of the Read Range-distance between the passive tag and the power reader that does the reading. However, when the frequency increases, it reduces the ability of the wavelength to penetrate some materials.

This means that Low Frequency is the best option to use since they allow for a steady physical card placement on readers to discern different cards at a go when they are in close range. This is because most of the surrounding environment such as metal and water barely affect Low Frequency.

On the other hand, the power reader can read cards that utilize High Frequency a few inches away. As a result, it enables a great extent of flexibility when choosing where to place the card and the reader.

In addition, it enables higher accuracy and higher processing speed. Another upside with using High Frequency RFID cards is that they feature a large memory.

UHF technology is best known for creating a rapid expansion of the boundaries of data collection accuracy and speed. With UHF technology, you can easily scan the cards up to 8 meters (25 feet) away. Moreover, RFID readers are able to identify several cards simultaneously. 

UHF is mostly used in docking points to quickly account for an entire truckload of numerous individually tagged containers. You can as well compare the time taken to track each container as the time taken by a truck to drive in and out of a distribution point. 

However, a major downside with UHF is its high sensitivity to the environment. They are affected with factors such as dampening, reflection as well as detuning depending on the surrounding material. 

If you wish to read RFID cards using an existing reader, it is important that you choose a card with an operating frequency that is compatible with your reader.

Environmental Condition

Although integrated chips are very delicate, housing them in proper material is important to help protect them even in the harshest environmental conditions. Even in a stable environment, ensure that you pick a RFID card that features a modest housing to help protect each of the card components. 

Similarly, if you mostly use your custom RFID cards for industrial applications, they must be able to perform well despite repetitive exposure to physical impact, extreme cold or heat, chemical agents, moisture, and vibration.

Hence, the rule of hand requires that you put into consideration the conditions where your RFID card will be exposed to when in use. While most cards have a 20-40 years keg life, you can only attain maximum service if they are able to withstand numerous high heat sterilization, high-pressure washes, and consistent exposure to harsh chemicals, liquids, rigor of collection and distribution, and low temperatures.


Although the price of RFID cards in the market varies, the wholesale price for them in China is quite low. 

With a few dollars in your pocket, you can buy RFID cards from China with favorable price.  Since price is more often than not a crucial aspect to consider knowing the right amount to spend when in look for a RFID card.

Composition of the Tagged Card

RFID cards may interact differently with readers depending on the material used to make the card. These materials include glass, plastic, metal or wood. 

However, even with a suitable material, liquids also impact the readability these cards. This is especially the case when liquids are in close proximity to the cards or readers. Thus, ensure that the card you purchase has been tested to perform in such scenarios.

Physical Space for Placing Your Card

RFID cards come in various shapes and sizes; from small hand-sized cards to large and medium sized cards that require a wallet. Thus, before making any purchase, ensure that you inquire with your RFID card supplier regarding on the preferred card size. 

Understanding the potential size limitation and placement option for your card will help you in identifying the best size and shape for your card. I recommend cards that make use of direct bonding technology that enables attachment of chip antennas without bulky housing, which result in smaller and thinner RFID cards.


Even with the above listed aspects, you may still find it challenging to obtain the ideal RFID card. Such instances are typical and require you to explore the potential of a custom design. Here, you can ask leading RFID card manufactures to customize your card to fit your requirements for dimension, material, chip type, and programming. 

If you wish to know how to custom a RFID card, consider matching and mixing standard components to come up a cost-effective card for your application. Additionally, customization also enables manufacturers to embed multiple technologies in one RFID card thus creating new initiative paths that connect legacy systems.

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