Honeywell Commercial T678A1015 Remote Temperature Controller

Remote Temperature Controller Honeywell T678A1015 delivers precise temperature control for commercial boilers, tanks, ducts, and pipes. This unit features a copper bulb (1/2 inch diameter, 4-3/16 inch length) with a 20-foot capillary and a fixed differential of 3°F for reliable, stable operation.

Setpoint ranges from 0 to 100°F, providing flexible control across HVAC and process cooling or heating applications. Equipped with (2) SPDT contacts, it supports versatile switching and a broad load profile with ratings of 8A at 120V AC, 5.1A at 240V AC, and 4.2A at 277V AC (full load); and 48A at 120V AC/30.6A at 240V AC/25.2A at 277V AC (locked rotor). The unit is UL and CSA approved for safety and compliance, and connects via 1/2 inch conduit for straightforward installation.

With a compact footprint (2" W x 2-5/8" D x 5-5/8" H) and a single sensor input, the Honeywell T678A1015 is ideal for boiler, tank, duct, and pipe control. The 2000 VA maximum connected load and the two knockout openings (7/8" diameter) support robust, industrial-grade performance.

• Two SPDT contacts for flexible switching
• Copper bulb sensor with a 20 ft capillary
• 0–100°F setpoint with 3°F fixed differential
• UL and CSA approved for safety and reliability
• 1 sensor input and 2000 VA max load
• 1/2 inch conduit connection and compact installation
• Applications: boiler, tank, duct, pipe