T675A/B and T678A Temperature Controllers

T675A/B and T678A temperature controllers regulate the temperature of air or liquids in ducts, pipes, tanks, and boilers. Typical uses include control of dampers and valves in heating, cooling, or heating-cooling systems.

• T675A has one single-pole, double-throw (SPDT) switch that breaks R-B and makes R-W at the setpoint on temperature rise
• T675B manual reset low limit has one single-pole, single-throw (SPST) switch that breaks at the setpoint on a temperature fall, and requires manual setting
• T678A has two single-pole, double-throw (SPDT) switches that operate in sequence
• T675A models available with adjustable differential
• T675A and T678A have setpoint adjustment knob on front of case
• Capillary tubing allows remote mounting of sensing element; models available with various lengths
• T675A and T678A models available with a fast-response sensing element
• Controller can be mounted in any position
• Mounting accessories available for all applications
• Ambient temperature compensated