RFID systems are known for their reliability, flexibility, and performance, serving as a top solution for access control and other applications. They’re available in a range of styles so you can find your best fit and ensure your system is designed to serve your environment’s needs. Whether you’re seeking a short-range solution for keypad access or a long-range system for vehicle access, you can find an RFID system that matches your specifications.
At EMX, we offer a diverse range of RFID solutions that differ based on their operating range, features, and technology types. When you understand the two types of RFID technology — active and passive — you can better determine the best choice for your application. Read on to explore the differences and stand-out products between these types below and connect with our team to find the best fit.
Exploring Active RFID Systems
An RFID system consists of a reader and a tag that it reads, and an active system operates with a tag that has its own battery. This allows active RFID tags to supply their own energy and send out data without help from the reader. Active RFID systems allow for highly accurate readings over longer distances but do necessitate a bulkier style due to the tag’s battery. It’s also more expensive and requires the battery to be replaced over time, which can be challenging. Still, the performance and functionality of active RFID make it an attractive choice for many users seeking access control over longer distances.
Exploring Passive RFID Systems
In passive RFID systems, the tag does not contain its own power source, so it requires the energy of the reader itself to operate. The exact technical details differ between different systems, but in general, a passive RFID reader sends a burst of energy toward the tag, which the tag reflects back to the reader to communicate the data stored on the tag. This passive process demands that the tag and reader be closer together, so users won’t experience the same distance capabilities allotted by an active system. Still, the lack of battery means this technology is also lighter weight and won’t require as much upkeep to ensure its smooth operation.
Three options are most commonly sought after, each differing based on the frequency used.
Low Frequency (LF), 125 KHz
A low-frequency passive RFID system operates at 125 KHz and has a short operating range of only 3-4 inches. It’s very strong and has low interference with materials and radio waves. Low-frequency RFID is used for a variety of different applications, including key fobs or microchips in pets, and it’s a perfect match for short-range access control needs due to its consistent performance.
At EMX, we offer a low-frequency solution within our TRES readers, like the P-300. These passive systems provide impressive performance without requiring a battery and they integrate with other RFID technology using 125 Khz frequency. We also offer a hybrid option within the G2PRX Card, which is compatible with both 125 KHz and 900 MHz.
High Frequency (HF), 13.56 MHz
A high-frequency passive RFID system allows for slightly longer read ranges than LF alternatives, serving as a medium-range RFID solution. It’s a versatile solution forpassports, payment cards, and access control systems that don’t require as large of an operating range as UHF solutions, but demand more than what LF models can provide.
Ultra-High Frequency (UHF), 900 MHz
The technology used in UHF RFID can allow for a further read range of 20-30 feet, depending on the tag and the reader type. This expanded operating range makes this an attractive choice for a wide range of access control needs and other applications. The potential drawback to this passive system type is that it’s more sensitive to interference with nearby metal materials and liquids, which can decrease the range. However, a strategic setup can help alleviate this problem, and our team is here to help you troubleshoot.
At EMX, we offer the Patriot Series for UHF RFID needs, an impressive line-up of readers offering advanced capabilities including an 18 to 25-foot operating range and user-friendly features for streamlined set-up. It’s RS232, RS485, and OSDP compliant and supports multiple Wiegand bit formats. It’s also available in a convenient kit so you can ensure you have everything you need to plug and play for your long-range passive RFID needs.
Our VIPER headlamp/windshield tag also operates within the ultra-high frequency range and offers a superior solution for convenient and secure RFID tags. Its sleek design couples with a clear adhesive-backed sticker compatible with difficult-to-tag materials and it can be mounted in a vertical or horizontal orientation for enhanced flexibility. For added security, you can take advantage of the VIPER’s ability to self-destruct when removed, preventing them from being stolen and used again. For security and ease of use in a UHF RFID tag, choose the VIPER.
Choosing Between RFID Systems for Your Access Control Needs
Are you ready to level up your access control system with the power of RFID? We’re here to help.
The first consideration in finding the right RFID system for your needs is to choose between active and passive. While active systems offer the longest operating range with enhanced accuracy, they’re more expensive, bulkier, and require battery replacements over time. Passive RFID systems have a lower operating range and may require more care when determining the placement of the tag (such as horizontal or vertical orientation), but are less expensive and exceptionally reliable.
If you’re choosing a passive system, you must also determine the frequency type best suited to your environment or needs. Each frequency is incompatible with one another, so you must ensure your reader and tag are compatible. The exception to this rule is the G2 Prox, which has two separate antennas to allow both LF and UHF operations.
Choosing the right frequency type for your passive RFID system requires determining the operating range needed for your application. If you’re seeking a short-range solution, such as scannable keycards, the LF option with 125 KHz is a perfect choice. Our proximity readers and multi-use G2 Prox are both compatible with low-frequency operation and serve as reliable and strong choices with low interference. Need something for long-range access control instead? The Patriot is a perfect choice, providing up to a 25-foot operating range, reliable performance, and enhanced flexibility.
Still not sure which choice is right for you? Don’t worry — our team is here to help.
Talk to EMX to Find the Right RFID System for You
At EMX, we’re committed to helping our customers find their ideal access control solutions, and we’ve developed a wide range of systems that can be tailored to your needs. When you’re evaluating our diverse array of RFID systems to find the perfect match, share your needs with our team and we’ll help you choose the right system with confidence. Talk to us today to get started.
