Data logger having a RAM that accepts electro-magnetically a sensor table and a sample table

A data logger including

• a housing containing at least one sensor;
• programmable control means;
• a Random Access Memory (RAM) providing data storage means for storing data from the at least one sensor;
• power means;
• electro-magnetic transfer means for accessing the logger and for recovering data from the data storage means from external to the housing, wherein the programmable control means includes a pre-programmed Erasable Programmable Read Only Memory (EPROM) containing control instructions including an operating program, and a sensor driver for each of said at least one sensor;
• the RAM is adapted to accept, from external to the housing and via the electro-magnetic transfer means, a sensor table accessible by the operating program for commanding the appropriate sensor driver to operate the required sensor and a sample table accessible by the operating program containing instructions on the operation of each sensor to evoke a desired sampling regime;
• and
• a power up coil is provided within the housing to enable power from external to the housing to be supplied during programming and during recovery of data.