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| Proximity Readers |
| These are capable of reading cards and key ring tokens. They have a range of between 8cm and 3 metres. |
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| Token Readers |
| These read a key ring style token and requires the
token to be touched onto the reader. Tokens are also quick and easy
to use. |
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| Swipe Card readers |
| These work by reading a magnetic strip located on the back of a swipe card. Printable versions of swipe cards can act as an ID card . |
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| Keypads |
| Keypads can either have a generic pin number for users or individual pins for each user. |
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| Finger Print Readers |
| These can be used to identify a user and
grant access if the fingerprint is authorised. |
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