Relays can be triggered ON or OFF by a CONTROLLER in Response to Time, Light Level, Temperature or Combinations of Time & Light and Time & Temperature.

Time/Photo Control

The WTP- 4408 Time/Photo Controller has 8 outputs that can each be programmed uniquely with the following general features:

• Programming times on a weekly schedule for ON and/or OFF control.
• Astronomic (position of sun) control for ON and OFF control of lights.
• Adjustable photocell levels, when an outdoor photocell is connected, from 0 to 6,000 footcandles for ON and OFF control. Each output can be set to switch at a unique light level.
• Combined photocell and time clock programs.
• Up to 64 unique holiday (day of year) programs for each output. Holiday programs take precedence over weekly programs.

Programming the WTP-4408 is via a built-in membrane keypad and graphical display. The display interface uses intuitive prompts to guide the user through programming and adjustments. A demonstration and tutorial of how to program the WTP-4408 is now on this website.

Time/Temperature Control

The WTT-4944 Time/Temperature Controller is designed for control of parking lots in colder climates where block heater receptacles are used.

The time/temperature function can be set to cycle receptacles ON and OFF in response to air temperature. The colder it is, the more time the receptacles are ON. In addition, the WTT-4944 can be programmed to switch receptacles OFF entirely at designated time periods.