XR-420 T8, T16 and T24 Thermistor Chains
The Thermistor Strings XR-420 T8, T16 and T24 are a series of multichannel temperature data recorders designed to operate with arrays of thermistor. The XR-420 can include up to three eight-channel modules, and any combination of thermistors (up to 24) can be readily made using the eight channel modules.
The thermistor strings are custom made and may be of any length and with any spacing between thermistors. The thermistor may be mounted in-line on a cable, or embedded into a rugged PVC tube for ground temperature measurements. They have been made to be deployed in sea or lake water, as well as underground or in ice. They have been used to measure internal waves and for cryospheric studies.