Din mount thermocouple terminal blocks are designed for use in temperature measuring circuits. Two-circuit terminal blocks with current bars made of thermocouple material. Each Thermocouple block mounts on standard 35mm DIN rail and are identified with calibration type and positive (+) and negative (-) connections. •CTT2.5UK ‘K’ type : Chromel (NiCr) Alumel (NiAl) • CTT2.5UJ ‘J’ type - Iron (Fe) Constantan (CuNi) • CTT2.5UT ‘T’ type - Copper (Cu) Constantan (CuNi)