GC-series GSM Commanders can take 2 x temperature measurements by connecting a temperature interface module to the expansion port on the GSM Commander. Separately available probes are connected to the interface module. If IO expansion modules are also used, the interface module is simply connected to the OUT terminal of the last expansion module in the setup. Probes are available in different lengths and different temperature ranges.
| Code | Description |
| GT002 | Temperature Interface module : Interfaces to 2 x Temperature probes (not included) |
| GT001-1 | 0 - 100°C Temperature probe 2m |
| GT001-2 | 0-100°C Temperature probe 4m |
| GT001-3 | 0 - 100°C Temperature probe 8m |
| GT011-1 | -17 - 35°C Temperature probe 2m |
| GT011-2 | -17 - 35°C Temperature probe 4m |
| GT011-3 | -17 - 35°C Temperature probe 8m |