T675AB and T678A Temperature Controllers

Description

The Honeywell T675A/B and T678A Temperature Controllers regulate the temperature of air or liquids in ducts, pipes, tanks, and boilers, typically controlling dampers and valves in heating, cooling, or heating-cooling systems. T675A has one SPDT switch that breaks R-B and makes R-W at setpoint on temperature rise; T675B is a manual reset low-limit variant with one SPST switch that breaks on temperature fall and requires manual reset; T678A has two SPDT switches operating in sequence – the multi-stage tier above the single-switch T675A/B. Setpoint adjustment knob on the front of the case, with capillary tubing allowing remote mounting of the sensing element in various lengths, including fast-response sensing element options. Jaideo Automation supplies Honeywell building automation products across India – contact us with your project requirements for a quotation.