The new TrolMaster PCT-3 EC and temperature probe has been improved in several ways. The new PCT-3 features a reduced diameter protective sleeve and threaded body that allows the probe to be installed in standard 3/4″ PVC T-fittings. The PCT-3 also has an improved sensing element for more stable and reliable performance and we have reduced the length of the probe to fit into tight spaces. It can be used with the AMP-2 or AMP-3 nutrient sensor module.