🎛️ 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 1/8 DIN, Digital PID Controller and Limit, 4 Outputs, Universal Input, 100-240 VAC
SKU: PM9C1KH-ALEJAAA
Stock confirmed at order — usually ships from stock
$564.28

Watlow
Watlow 1/8 DIN, Digital PID Controller, 2 SSR Outputs, Universal Input, 100-240 VAC
SKU: PM9C1KK-AAAAAAA
Stock confirmed at order — usually ships from stock
$361.08

Watlow
Watlow 1/8 DIN, Digital PID Controller and Limit, 2 SSR Outputs, Universal Input, 100-240 VAC
SKU: PM9C1KK-ALEJAAA
Stock confirmed at order — usually ships from stock
$548.65

Watlow
Watlow 1/8 DIN, Ramp Soak PID Controller, 2 Relay Outputs, Universal Input, 100-240 VAC
SKU: PM9R1EJ-AAAAAAA
Stock confirmed at order — usually ships from stock
$600.23

Watlow
Watlow 1/8 DIN, Ramp Soak PID Controller, 4 Relay Outputs, Universal Input, 100-240 VAC
SKU: PM9R1EJ-AAEJAAA
Stock confirmed at order — usually ships from stock
$694.01

Watlow
Watlow 1/8 DIN, Ramp Soak PID Controller, Process Output, Universal Input, 100-240 VAC
SKU: PM9R1FA-AAAAAAA
Stock confirmed at order — usually ships from stock
$462.68

Watlow
Watlow 1/8 DIN, Ramp Soak PID Controller, 4 Outputs, Universal Input, 100-240 VAC
SKU: PM9R1FK-AAEJAAA
Stock confirmed at order — usually ships from stock
$595.54

Watlow
Watlow 1/8 DIN, Ramp Soak PID Controller, 2 SSR Outputs, Universal Input, 100-240 VAC
SKU: PM9R1KK-AAAAAAA
Stock confirmed at order — usually ships from stock
$478.31

Watlow
Watlow 1/8 DIN, Ramp Soak PID Controller, 4 Outputs, Universal Input, 100-240 VAC
SKU: PM9R1KK-AAEJAAA
Stock confirmed at order — usually ships from stock
$572.10

Watlow
Watlow ST, LIMIT AND PID Controller, 4 Outputs (40amp/10amp) 2 Universal Inputs, 24 VAC
SKU: STCL-B1AB-AAAA
Stock confirmed at order — usually ships from stock
$867.63

Watlow
Watlow ST, LIMIT AND PID Controller, 4 Outputs (40amp/10amp), 2 Universal Inputs, 110/120 VAC
SKU: STCL-B2AB-AAAA
Stock confirmed at order — usually ships from stock
$811.07

Watlow
Watlow ST, LIMIT AND PID Controller, 4 Outputs (40amp/10amp), 2 Universal Inputs, 208/240 VAC
SKU: STCL-B3AB-AAAA
Stock confirmed at order — usually ships from stock
$811.07

Watlow
Watlow ST, LIMIT AND PID Controller, 4 Outputs (40amp/25amp) 2 Universal Inputs, 24 VAC
SKU: STCL-F1AC-AAAA
Stock confirmed at order — usually ships from stock
$875.70

Watlow
Watlow ST, LIMIT AND PID Controller, 4 Outputs (40amp/25amp), 2 Universal Inputs, 110/120 VAC
SKU: STCL-F2AC-AAAA
Stock confirmed at order — usually ships from stock
$819.15

Watlow
Watlow ST, LIMIT AND PID Controller, 4 Outputs (40amp/25amp), 2 Universal Inputs, 208/240 VAC
SKU: STCL-F3AC-AAAA
Stock confirmed at order — usually ships from stock
$819.15
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.
