Model 4999 Terminal Boxes
The Model 4999 Terminal Box allows instrument leads to be grouped in one convenient location thereby saving time when readings have to be made on a number of instruments. Housed in a fiberglass enclosure, the Terminal Box provides a quick and easy means of taking sensor readings. The Terminal Box can handle up to sixteen 4-conductor sensors (e.g. 16 vibrating wire gages with their thermistors) or thirty-two 2-conductor sensors (e.g. 32 vibrating wire gages). It can also be protected from lightning damage by the addition of plasma surge arrestors and a suitable earth ground connection.

Model 4999-12L/E LAB3 Surge Module
The Model 4999-12L/E LAB3 Surge Protection Board is designed to protect Geokon transducers, dataloggers and power supplies from short duration, high voltage surges that may be induced in the transducer or interconnecting cables. Protection is provided by circuitry including tripolar plasma surge arrestors, transient suppression diodes and inductors.