🎛️ Category
Temperature & Process Controllers
PID and limit controllers, process controllers, and SCR power controllers for precise heat and process control.
Anderson-Bolds supplies temperature and process controllers from Watlow, Fenwal, and Novus — PID process controllers, FM-approved limit controllers, and SCR power controllers. We can pair a controller with the matching Watlow heater and sensor so the loop is sized and tuned together.

Watlow
Watlow Power Series SCR, 3-Phase, 200-600 Output VAC, 65 amp
SKU: PC30-N20C-0000
Stock confirmed at order — usually ships from stock
$2,181.87

Watlow
Watlow Power Series SCR, 3-Phase, 24-120 Output VAC, 85 amp
SKU: PC30-N25A-0000
Stock confirmed at order — usually ships from stock
$2,524.68

Watlow
Watlow Power Series SCR, 3-Phase, 200-480 Output VAC, 85 amp
SKU: PC30-N25B-0000
Stock confirmed at order — usually ships from stock
$2,524.68

Watlow
Watlow Power Series SCR, 3-Phase, 200-600 Output VAC, 85 amp
SKU: PC30-N25C-0000
Stock confirmed at order — usually ships from stock
$2,524.68

Watlow
Watlow Power Series SCR, 3-Phase, 24-120 Output VAC, 105 amp
SKU: PC30-N30A-0000
Stock confirmed at order — usually ships from stock
$2,592.59

Watlow
Watlow Power Series SCR, 3-Phase, 200-480 Output VAC, 105 amp
SKU: PC30-N30B-0000
Stock confirmed at order — usually ships from stock
$2,592.59

Watlow
Watlow Power Series SCR, 3-Phase, 200-600 Output VAC, 105 amp
SKU: PC30-N30C-0000
Stock confirmed at order — usually ships from stock
$2,592.59

Watlow
Watlow Power Series SCR, 3PH, 24-120 Output VAC, Communications/Diagnostics, 90 amp, Fan Cooled
SKU: PC31-F20A-1100
Stock confirmed at order — usually ships from stock
$2,797.41

Watlow
Watlow Power Series SCR, 3PH, 200-480 Output VAC, Communications/Diagnostics, 90 amp, Fan Cooled
SKU: PC31-F20B-1100
Stock confirmed at order — usually ships from stock
$2,797.41

Watlow
Watlow Power Series SCR, 3PH, 200-600 Output VAC, Communications/Diagnostics, 90 amp, Fan Cooled
SKU: PC31-F20C-1100
Stock confirmed at order — usually ships from stock
$2,797.41

Watlow
Watlow Power Series SCR, 3PH, 24-120 Output VAC, Communications/Diagnostics, 140 amp, Fan Cooled
SKU: PC31-F25A-1100
Stock confirmed at order — usually ships from stock
$3,136.98

Watlow
Watlow Power Series SCR, 3PH, 200-480 Output VAC, Communications/Diagnostics, 140 amp, Fan Cooled
SKU: PC31-F25B-1100
Stock confirmed at order — usually ships from stock
$3,136.98

Watlow
Watlow Power Series SCR, 3PH, 200-600 Output VAC, Communications/Diagnostics, 140 amp, Fan Cooled
SKU: PC31-F25C-1100
Stock confirmed at order — usually ships from stock
$3,136.98

Watlow
Watlow Power Series SCR, 3PH, 24-120 Output VAC, Communications/Diagnostics, 155 amp, Fan Cooled
SKU: PC31-F30A-1100
Stock confirmed at order — usually ships from stock
$3,205.97

Watlow
Watlow Power Series SCR, 3PH, 200-480 Output VAC, Communications/Diagnostics, 155 amp, Fan Cooled
SKU: PC31-F30B-1100
Stock confirmed at order — usually ships from stock
$3,205.97

Watlow
Watlow Power Series SCR, 3PH, 200-600 Output VAC, Communications/Diagnostics, 155 amp, Fan Cooled
SKU: PC31-F30C-1100
Stock confirmed at order — usually ships from stock
$3,205.97

Watlow
Watlow Power Series SCR, 3PH, 24-120 Output VAC, Communications/Diagnostics, 225 amp, Fan Cooled
SKU: PC31-F35A-1100
Stock confirmed at order — usually ships from stock
$4,158.92

Watlow
Watlow Power Series SCR, 3PH, 200-480 Output VAC, Communications/Diagnostics, 225 amp, Fan Cooled
SKU: PC31-F35B-1100
Stock confirmed at order — usually ships from stock
$4,158.92

Watlow
Watlow Power Series SCR, 3PH, 200-600 Output VAC, Communications/Diagnostics, 225 amp, Fan Cooled
SKU: PC31-F35C-1100
Stock confirmed at order — usually ships from stock
$4,158.92

Watlow
Watlow Power Series SCR, 3PH, 24-120 Output VAC, Communications/Diagnostics, 65 amp
SKU: PC31-N20A-1100
Stock confirmed at order — usually ships from stock
$2,693.92

Watlow
Watlow Power Series SCR, 3PH, 200-480 Output VAC, Communications/Diagnostics, 65 amp
SKU: PC31-N20B-1100
Stock confirmed at order — usually ships from stock
$2,693.92

Watlow
Watlow Power Series SCR, 3PH, 200-600 Output VAC, Communications/Diagnostics, 65 amp
SKU: PC31-N20C-1100
Stock confirmed at order — usually ships from stock
$2,693.92

Watlow
Watlow Power Series SCR, 3PH, 24-120 Output VAC, Communications/Diagnostics, 85 amp
SKU: PC31-N25A-1100
Stock confirmed at order — usually ships from stock
$3,036.73

Watlow
Watlow Power Series SCR, 3PH, 200-480 Output VAC, Communications/Diagnostics, 85 amp
SKU: PC31-N25B-1100
Stock confirmed at order — usually ships from stock
$3,036.73

Watlow
Watlow Power Series SCR, 3PH, 200-600 Output VAC, Communications/Diagnostics, 85 amp
SKU: PC31-N25C-1100
Stock confirmed at order — usually ships from stock
$3,036.73

Watlow
Watlow Power Series SCR, 3PH, 24-120 Output VAC, Communications/Diagnostics, 105 amp
SKU: PC31-N30A-1100
Stock confirmed at order — usually ships from stock
$3,104.64

Watlow
Watlow Power Series SCR, 3PH, 200-480 Output VAC, Communications/Diagnostics, 105 amp
SKU: PC31-N30B-1100
Stock confirmed at order — usually ships from stock
$3,104.64

Watlow
Watlow Power Series SCR, 3PH, 200-600 Output VAC, Communications/Diagnostics, 105 amp
SKU: PC31-N30C-1100
Stock confirmed at order — usually ships from stock
$3,104.64
Temperature & Process Controllers — questions buyers ask
Do I need a separate limit controller?
For most heating systems, yes — a redundant high-limit controller with its own sensor protects against runaway if the primary control loop fails, and it's often required by code or insurers.
