DIN rail mount temperature transmitter for thermocouple
-200 ... +1 200 °C | HD 778, HD 978 series Delta Ohm

HD 778TR1, HD 978TR1 and HD 978TR2 are 4…20mA two-wired configurable
passive transmitters with microprocessor for K, J, T and N type thermocouple sensors. They convert the voltage value generated by the thermocouple into a linear current signal included in the range 4…20mA. The use of digital devices allows obtaining an excellent precision and stability in time. User can set the 4…20mA (or 20…4mA) output into any temperature range in the measuring range included in the measuring range of the single thermocouple with a minimum range of 50°C. The range and type of thermocouple are set by simply using one button. A led indicates
the alarm situation (broken or not connected sensor) and it helps user during the programming. Moreover, transmitters are protected against polarity inversions.
HD778TR1 is specifically designed to be installed in DIN B type connection heads, HD978TR1 and HD978TR2 are suitable for mounting on 35 mm DIN bars. Beyond 4…20mA output, HD978TR2 has a 3½ digit (Height 10 mm) display which allows displaying the measured temperature.


Other Delta Ohm products




Air speed


Acoustic - Vibrations

Air quality - CO - CO2



Microclimate - WBGT

Environmental Analysis

Water Analysis portables

Water Analysis

Other products