Mount the reader in any orientation. Consider the following before selecting a location for the reader.
Mount the reader in an area free from electromagnetic interference. Sources of interference include generators, pumps, converters, non-interruptible power supplies, AC switching relays, light dimmers, and computer CRT terminals.
Ensure that any cable losses between the reader and antenna are considered to ensure the desired level of system performance.
Ensure that power can reach the reader.
Ensure the reader is mounted in a location where it will not be easily disturbed, bumped, or damaged.
Use a level for precise vertical or horizontal mounting.