Recommendation for powder coating oven

Update: Control panel / DIY kits for powder coating ovens are available here. 

Two types of relays can be used for powder coating oven control: mechanical contactor and solid state relay (SSR). Different types of relay may need different PID controllers. SSR will provide a more precision control. But it needs heat sink to remove the heat generated from the SSR. Please find the comparison between contactor and SSR here.

• SSR solution:

1. Recommended controller:
SYL-2352: Most popular basic PID for powder coating oven applications.
SYL-2352P: If you need a ramp soak feature (input a temp & time profile), SYL-2352P is recommended.
SYL-2362: This controller can also be used. It is an universal controller which can drive both SSRs and mechanical relays. 
SWA-2451B: If you need a PID with one step timer. Some people put a timer in the control loop. They use the alarm to activate the timer when temperature reaches the alarm setting. When time is up, it will turn off the output to shut off the heater. This PID controller has built-in timer function w/ 8 different timer modes.

More controllers with SSR output can be found here. 

2. SSR and heatsink:
SSR:
SRDA25: 25A SSR, which is good to drive one 3000W/240V element. 
SRDA40: 40A SSR, which is good to drive two 3000W/240V elements. 

Heatsink:
25A/40A internal and external mount heat sinks can be found here. External mount heatsinks are recommended, which will dissipate the heat to the outside directly. For internal mount heatsinks, a cooling fan may be needed to blower air over the heat sink. 

• Mechanical contactor solution:

1. Recommended controller:
SYL-2342: Most people use this controller. It can be used to drive either a contactor or a gas valve.
SYL-2342P: If you need a ramp soak feature (input a temp & time profile), SYL-2342P is recommended.
SYL-2362 This controller can also be used. It is an universal controller which can drive both SSRs and mechanical relays. 
SWA-2441B: If you need a PID with one step timer. Some people put a timer in the control loop. They use the alarm to activate the timer when temperature reaches the alarm setting. When time is up, it will turn off the contactor to shut off the heater. This PID controller has built-in timer function w/ 8 different timer modes.

More controllers with mechanical relay output can be found here. 

2. Mechanical contactor:
CN-PBC302-240V: 240V coil, 40A (resistive load) contactor, which is good to drive one or two 3000W/240V elements.
CN-PBC402-240V: 240V coil, 50A (resistive load) contactor. 

Please note, an external relay (or contactor) is not needed for gas heated oven. The controller internal relay can drive the gas valve directly.

• The following parts can be used for both SSR and mechanical relay systems. 

3. Temperature sensor (thermocouple)
TC-K3MM: (The popular choice) The base of the probe is made of a 0.55" (15 mm) long 5/16"-24 screw for easy mounting. 4" probe.
WRNK-171: 6" probe thermocouple. 
TC-K6A2: Some people like to put a temp sensor close to the parts. This sensor can be used.

4. Breaker switch for main power
1) SWM-DR  It can not only offer reliable high current handling but also protections on both circuit-overload and short circuit.
2) SWM-DR-C  It can not only offer reliable high current handling but also protections on both circuit-overload and short circuit.
Please click here for information on how to select the correct circuit breakers and the difference between SWM-DR and SWM-DR-C.

5. Other online resources (guides, recommended parts, etc)

Last update: 11/10/2023