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How do Magnetic Stripe Readers (MSR) Work?

Magnetic card readers use similar technology to legacy tape decks and VHS players; a small sensor in the MSR card reader measures the magnetic output from the card as it's swiped and sends the output to the pos computers as text data. Used for capturing Magnetic Card, employee identification, or customer loyalty data, a magnetic card reader ensures quick, error-free data entry for sensitive information.

What Kind of Magnetic Card Reader should I Buy?

It's important to verify with your POS software provider if there're any configuration requirements or specific MSR card readers they prefer. Otherwise, magnetic card readers are pretty interchangeable, though there is some variation in terms of readability, durability, interface, tracks supported, programmability, media types, and card encryption options.

1. Readability

Magnetic card readers are designed for either high volume or standard volume use. High volume MSR card readers are equipped with components for a longer read life and usually constructed of metals. They have a longer reading channel, which ensures a successful scan on the first pass. High volume card readers also have higher volume prices, but pay for themselves in durability and performance. They are recommended for retail environments with very high transaction volumes, such as a chain store.

Standard volume MSR card readers are fine quality card readers for normal point of sale operation. These units occasionally require an additional pass to read the card and have a shorter reading life than higher volume model. They are economical, reliable and a popular choice for most POS systems.

2. Durability

You need to consider factors such as the environment of intended uses and frequency of use when selecting a card reader. Is your POS Counter in a climate controlled area or outdoors? Is it operating in an unsecured self service kiosk or only by employees? Outdoor or in public use of magnetic card readers warrants a metal constructed and/or weatherproof card reader.

 3. Interface

Magnetic Card Readers MSR are available with three different interface options: USB, PS/2 Keyboard Wedge, and Serial. The two most commonly used are the USB and PS/2, which send information back to the computers as if it were typed on a Keyboard. Card Readers connected via serial interface may require special software to interpret the data from the card reader. Most models are available with a variety of interface choices- you will need to select the part number with the proper interface for your POS set up.

4. Track Numbers

Magnetic stripes on the back of card can contain up to three different tracks of programmed information. The number of tracks used on a card depends on the type of card. Standard Magnetic Cards utilize track 1 and track 2. Track 3 may be used by other types of cards. Because Magnetic Card Readers come in two track and three track versions, it is important to verify what information will be contained on types of cards you may be using with your POS system.

5. Programmability

While all card readers are designed to read track 1 and track 2, or tracks 1,2, and 3 data right out of the box, most MSR Card Readers can actually be programmed to divide, rearrange, edit, and validate fields of magnetic card data. Programming your card reader to change the way the data is viewed is important when running software that requires delivery of the data in a certain format. Keep in mind that using a programming functionality of your card reader is an advanced feature and may require manufacturer support.

6. Media Types

All of Magnetic Card Reader units read magnetic stripes, but some offer combination models that also feature the ability to read barcodes. There are also slot Card Readers designed only to read barcodes. Some examples of cards media types that may use barcodes include membership cards, and employee and student ID cards.

7. Card Encryption

Securing customers' Magnetic Card data is the prime focus of PCI compliance. Encrypted magnetic card readers provide greater security than readers that send plaintext data, encrypting data at the time of reading, and transmitting that encrypted data to your Magnetic Cards processor. Readers must be preprogrammed by merchant account provider, though many can be updated remotely to meet changing requirements.