Proximity Sensors

OMRON TL PROXIMITY SWITCH SENSOR OERLIKON KN3 VERT MILL
Paypal

US $9,999.99

Tropel 5 2135 KRF Stepper Mask Projection Lens with Proximity Sensor 248nm
Paypal

US $7,947.00

400x Proximity Switch Sensor 8mm detection NPN 18Diame
Paypal

US $3,469.52

BENTLY NEVADA 18745 04 5 mm 5mm PROXIMITOR PROXIMITY SENSOR REPLACES 18745 02
Paypal

US $1,250.00

STI MS4332C AC1 15X 05E Proximity Sensor
Paypal

US $1,209.00

STI MS4332C AC1 15X 05R Proximity Sensor
Paypal

US $1,209.00

Proximity Sensors

HID Proximity Cards Are The Most Widely Used For HID Access Cards.

Once introduces, they quickly replaced their predecessors, the MIFARE and Wiedands RFID ID cards. Where did they go?

The MIFARE

MIFARE is a smart card technology with 13.56 MHz memory card on which chip data can be encoded by appropriate device like a card printer. The range - distance the reader can read its information, is fairly short and is generally used in public transactions such as transportation payments, i.e. toll payments. This card was used for public transportation networks in Asia, Europe and the US. Eventually, the success lead to its use in HID access for buildings and offices.

However, in December 2007, Henry Plotz, a German Researcher and Karsten Nohl demonstrated before the Chaos Computer Club, a club of computer hackers, during the 24th Chaos Communications Congress, how they were able to hack the MIFARE chip showing its security vulnerabilities. As of today, there is limited use of MIFARE as an HID access card.

The Wiegand

The Wiegand is the trade name of the technology after its inventor, John R. Wiegand, used in card readers and sensors embedded in cards for access control. There are three wires that form the central system where the data of the user is encoded.

The industry standard 26-bit format is used where mor than 16 million cards can be issued with unique numbers

The fact that a Wiegand card requires contact with the reader, makes throughput very low compared to the hid proximity cards. This low throughput and the necessity of imbedding the credentials on the card during the manufacturing process are the two glaring disadvantages that limited its use as an HID access card.

The HID proximity cards

The most popular among the RFID cards used in access control is the hid proximity card. The acronym HID stands for Hughes Identification which was spun off from the time of Howard Hughes, owner of Hughes Aircraft Company. Each card is the size of today's ATM card. It contains an RFID chip operating at 125 kHz or 13.26 MHz. The proximity cards are known more to use the 125kHz technology while the 13.26 MHz is the iClass cards.

Within the card, the information that is embedded is seperated into two. The first is the facility code and the second i the card's number. These two bits of information provide the unique identifier of the card bearer. The facility code is contained in as many cards as there are number of personnel authorized to access that particular facility. The second number is then given to the ard holder. With these two numbers it is possible to determine who is authorized to be in which location.

The moment the card is read, this information is then transmited to the system's control her ethe data is analyzed. If approved, the access is granted.

This makes the HID access card made of HID proximity card very convenient and safe.

Conclusion

In the absence of any adverse findings on this type of HID access card made from a hid proximity card, it can be considered as the best for use in your company’s access control system.

An HID access card is very different in operational details in comparison to an hid proximity card. Ask your professional consultant on which is uniquely right for you.