OTS-F1
Ambient or line sensing
NEMA 4X enclosure
Fixed, non-adjustable set point 40°F (4°C)
SPST switching
5°F differential (15°C)
22 amps
120, 208, 240, or 277 VAC
190°F (88°C) max. enclosure exposure limits
6' bulb and capillary
OTS-1A
Line sensing
Adjustable dial setpoint 25°F - 325°F
SPDT switching
10°F differential
22 amps
120, 208, 240, 277, 480 input voltages
-40° - 160°F max enclosure exposure limits
10' bulb and capillary
OTS-2A
Ambient sensingAdjustable dial setpoint 15° - 140°F (9° - 60°C)
SPDT switching
10°F differential
22 amps
120, 208, 240, 277, 480 input voltages
-40° - 160°F max enclosure exposure limits bulb in local mount
OTS-3A
Ambient sensingNEMA 4, 7, & 9 enclosure
Adjustable dial setpoint 25° - 325°F (9° - 60°C)
SPDT switching
10°F differential
22 amps
120, 208, 240, 277, or 480 input voltages
-40° - 160°F max. enclosure exposure limits 10' stainless steel capillary
OTS-4A
Ambient sensingNEMA 4, 7, and 9 enclosure
Adjustable dial 15° - 140°F
SPDT switching
10°F differential
22 amps
120, 208, 240, 277, or 480 input voltages
-40° - 160°F Max. enclosure exposure limits 10' stainless steel capillary
A419ABC-1C
Digital line or ambient sensing
NEMA 1 enclosure
Adjustable keypad -30° - 212°F
SPDT switching
1° - 30°F differential
8-16 amps
120, 209, or 240 input voltages
-30° - 140°F max. enclosure exposure limits
6' thermistor
A419AEC-2C
Digital line or ambient sensing
NEMA 4X enclosure
Adjustable keypad - 30° - 212°F
SPDT switching
1° - 30°F differential
22 amps
120, 208, 240, or 277 input voltages
N/A max. enclosure exposure limits
8' bulb and capillary
A19ABC-24
Line sensing
NEMA 1 enclosure
Adjustable dial -30° - 100°F
SPDT switching
3° - 12°F differential
22 amps
120, 208, 240, or 277 input voltages
190°F max. enclosure exposure limits
10' bulb and capillary
A19ANC-1C
Line sensing
Nema 3 enclosure
adjustable dial 0° - 150°F
SPDT switching
5° differential
22 amps
120, 208, 240, 277, or 480 input voltages
6' bulb and capillary
E55A-E21BS
Line sensingNEMA 4 enclosure
Adjustable dial 0° - 150°F
SPDT switching
1.5°F differential
15 amps
120, 240, +10/-15% input voltages
Temperature range 41° - 140°F 6' bulb and capillary




Heat trace cable systems provide heat to maintain the temperatures of pipe contents for the purposes of freeze protection or to maintain a specific process temperature range.