Honeywell T675A,B, T678A Remote Bulb Controllers
Remote Bulb Controllers
T675A,B, T678A
Remote bulb thermostats regulate temperature of air or liquids in ducts, pipes, tanks and boilers.
• Suitable for applications requiring temperature control of air or liquids where controller must be placed outside the sensing area.
• Typical uses include control of dampers and valves in heating, cooling and heating-cooling systems.
• Fast response models (available for use in return air duct) operate approximately four times faster than standard models.
• Controller can be mounted in any position. Ambient temperature compensation provides good temperature control.
• Refer to T775 Electronic Remote Temperature Controller where more exact control is required and/or remote controller location is preferred.
• T678 models have a maximum connected load of 2000 VA.
Select a link under the "item" tab below to order.
| Cat # | Comments | Includes | Output | Setpoint Temperature Range | Sensor Element | Differential Temp | Bulb Size | Capillary Length | Maximum Operating Temperature | Interstage Differential Temperature |
| T675A1045 | 1 SPDT | 0 F to 100 F | Stainless steel bulb | 3 F to 10 F | 1/2 in. x 4 3/16 in. | 20 ft. | 125 F | — | ||
| T675A1102 | — | 1 SPDT | 160 F to 260 F | Copper bulb | 3 F to 10 F | 1/2 in. x 4 3/16 in. | 20 ft. | 280 F | — | |
| T675A1136 | — | 1 SPDT | 0 F to 100 F | Copper bulb | 1 F fixed | 1/2 in. x 4 3/16 in. | 20 ft. | 125 F | — | |
| T675A1243 | Celsius model | 1 SPDT | 167 F to 257 F | Copper bulb | 3 F to 10 F | 1/2 in. x 4 3/16 in. | 5 ft | 125 F | — | |
| T675A1425 | — | 1 SPDT | 55 F to 175 F | Copper bulb | 3.6 F to 12 F | 1/2 in. x 3 9/16 in. | 20 ft. | 200 F | — | |
| T675A1458 | — | 1 SPDT | 55 F to 175 F | Copper bulb | 1 F fixed | 1/2 in. x 3 9/16 in. | 5 ft | 200 F | — | |
| T675A1508 | — | 107324A Duct Bulb holder | 1 SPDT | 0 F to 100 F | Copper bulb | 1 F fixed | 1/2 in. x 4 3/16 in. | 5 ft | 125 F | — |
| T675A1516 | — | 107324A Duct Bulb holder | 1 SPDT | 0 F to 100 F | Copper bulb | 1 F fixed | 1/2 in. x 4 3/16 in. | 5 ft | 125 F | — |
| T675A1524 | — | 1 SPDT | 55 F to 175 F | Copper bulb | 1 F fixed | 1/2 in. x 3 9/16 in. | 20 ft. | 200 F | — | |
| T675A1532 | — | 107324A Duct Bulb holder | 1 SPDT | 160 F to 260 F | Copper bulb | 3 F to 10 F | 1/2 in. x 4 3/16 in. | 5 ft | 280 F | — |
| T675A1540 | — | 107324A Duct Bulb holder | 1 SPDT | 55 F to 175 F | Copper bulb | 3.6 F to 12 F | 1/2 in. x 3 9/16 in. | 5 ft | 200 F | — |
| T675A1565 | — | 107324A Duct Bulb holder | 1 SPDT | 0 F to 100 F | Copper bulb | 3 F to 10 F | 1/2 in. x 4 3/16 in. | 20 ft. | 125 F | — |
| T675A1706 | Fast response model | 131524A duct bulb holder | 1 SPDT | 0 F to 100 F | Fast response capillary | 3 F to 10 F | coil 1 1/2 in. diameter x 5 in. | 5 ft | 125 F | — |
| T675A1771 | Fast response model | 131524A duct bulb holder | 1 SPDT | 55 F to 175 F | Fast response capillary | 1 F fixed | coil 1 1/2 in. diameter x 5 in. | 5 ft | 200 F | — |
| T675B1002 | — | 1 SPDT | 30 F to 50 F | Copper bulb | Manual Reset | 1/2 in. x 4 3/16 in. | 10 ft | 125 F | — | |
| T675B1010 | — | 1 SPDT | 30 F to 50 F | Copper bulb | Manual Reset | 1/2 in. x 4 3/16 in. | 20 ft. | 125 F | — | |
| T675B1028 | — | 1 SPDT | -20 F to +50 F | Copper bulb | Manual Reset | 1/2 in. x 4 3/16 in. | 10 ft | 125 F | — | |
| T678A1015 | maximum connected load = 2000VA | 2 SPDT switch contacts | 0 F to 100 F | Copper bulb | 3 F fixed | 1/2 in. x 4 3/16 in. | 20 ft. | 125 F | 3 F to 10 F adj. | |
| T678A1163 | maximum connected load = 2000VA; Celsius model | 2 SPDT switch contacts | 5 F to 95 F | Copper bulb | 3 F fixed | 1/2 in. x 4 3/16 in. | 20 ft. | 125 F | 3 F to 10 F adj. | |
| T678A1361 | maximum connected load = 2000VA | 2 SPDT switch contacts | 55 F to 175 F | Copper bulb | 3.6 F fixed | 1/2 in. x 3 9/16 in. | 20 ft. | 200 F | 3.6 F to 12 F adj. | |
| T678A1437 | maximum connected load = 2000VA; Celsius model | 2 SPDT switch contacts | 0 F to 100 F | Copper bulb | 3 F fixed | 1/2 in. x 4 3/16 in. | 5 ft | 125 F | 3 F to 10 F adj. | |
| T678A1445 | maximum connected load = 2000VA; Celsius model | 2 SPDT switch contacts | 55 F to 175 F | Copper bulb | 3 F fixed | 1/2 in. x 3 9/16 in. | 5 ft | 200 F | 3.6 F to 12 F adj. | |
| T678A1478 | maximum connected load = 2000VA; Fast response model | 2 SPDT switch contacts | 0 F to 100 F | Fast response capillary | 3 F fixed | 1/2 in. x 4 3/16 in. | 5 ft | 125 F | 3 F to 10 F adj. | |
| T678A1494 | maximum connected load = 2000VA; Fast response model | 2 SPDT switch contacts | 55 F to 175 F | Fast response capillary | 3.6 F fixed | 1/2 in. x 3 9/16 in. | 5 ft | 200 F | 3.6 F to 12 F adj. | |
| T678A1627 | maximum connected load = 2000VA | 2 SPDT switch contacts | 0 F to 100 F | Averaging capillary | 3.6 F fixed | 1/2 in. x 4 3/16 in. | 10 ft | 125 F | 3.6 F to 12 F adj. | |
| T678A1692 | maximum connected load = 2000VA; Celsius model | 2 SPDT switch contacts | — | Copper bulb | 3.6 F | 1/2 in. x 4 in. | 5 ft | 200 F | 3.6 F |
| Type: | Remote bulb | ||
| Application: | Regulates temperature of air or liquids in ducts, pipes, tanks and boilers |
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| Number of Sensor Inputs: | 1 | ||
| Voltage: | 120 Vac or 240/277 Vac | ||
| Frequency: | 50 Hz; 60 Hz | ||
| Output Type: | relay | ||
| Approvals: | |||
| Canadian Standards Association: | CSA Listed: Report -1 | ||
| Underwriters Laboratories Inc. | UL Listed: E4436, Vol. 4, Sec. 11, Guide XAPX |
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