Eltek 1000 Series Squirrel data loggers provide a flexible combination of channels, ranges, memory sizes and extra options. If there is not already a model which fits a particular application, then Eltek can almost certainly make one.
Eltek 1000 Series Customised Squirrel dataloggers - Wired
The basic element of the Squirrel data logger consists of the main board and the battery pack. The main board contains the power connector, display, RS232 serial connection, a pulse input, an 8 bit digital signal input and output connector. Up to eight additional input modules are connected to the main board during manufacture depending on the sensor input requirements.