Intermatic K4121C Control
The Intermatic K4121C is a professional-grade 120V stem mount photo control engineered for reliable dusk-to-dawn automation of outdoor lighting systems. Utilizing a mechanical bimetal switch paired with a cadmium sulfide photocell, this unit ensures precise 120 VAC operation across street, perimeter, and parking lot lighting applications. The thermal photocontrol technology includes a built-in 30 to 90-second time delay, which prevents nuisance "cycling" or flickering caused by headlights or lightning strikes. Designed for durability, the sonic-welded polycarbonate housing is raintight and operates effectively in extreme environments ranging from -40?F to 158?F. This fixed position lighting control features a 1/2"-14 NPSM threaded stem, facilitating secure mounting to standard electrical boxes or light fixtures. With a tungsten rating of 1800W and a ballast rating of 1000VA, the K4121C provides field-proven performance for contractors seeking a robust outdoor dusk-to-dawn sensor that minimizes maintenance callbacks.
Key Benefits- Load Compatibility: Rated for 15 Amp tungsten and 8.3 Amp ballast, making it compatible with HID, fluorescent, and incandescent fixtures.
- Rugged Construction: Polycarbonate enclosure protects internal components from UV degradation and moisture.
- Reliable Switching: SPST contact form with a "Fail ON" mode ensures safety by keeping lights energized if the sensor fails.
- Simplified Installation: Includes 9-inch 18 AWG wire leads, a washer gasket, and a locking nut for immediate field deployment.
- Precision Sensitivity: Factory calibrated for Turn ON at 1-5 foot-candles and Turn OFF at 3-15 foot-candles.
How do I test the photocell during daylight hours?
To verify operation, cover the cadmium sulfide sensor window completely with black tape or your hand. Because of the integrated thermal delay, the load may take up to two minutes to energize.
What is the proper mounting orientation for this control?
For maximum service life and weather resistance, mount the unit with the wire leads pointing downward to prevent moisture ingress through the threaded stem.
Does this unit work with LED fixtures?
While designed for tungsten and ballast loads, many technicians use the K4121C with LED drivers. However, always ensure the inrush current of the LED array does not exceed the mechanical switch's 8.3 Amp inductive rating.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Intermatic K4121C Control
The Intermatic K4121C is a professional-grade 120V stem mount photo control engineered for reliable dusk-to-dawn automation of outdoor lighting systems. Utilizing a mechanical bimetal switch paired with a cadmium sulfide photocell, this unit ensures precise 120 VAC operation across street, perimeter, and parking lot lighting applications. The thermal photocontrol technology includes a built-in 30 to 90-second time delay, which prevents nuisance "cycling" or flickering caused by headlights or lightning strikes. Designed for durability, the sonic-welded polycarbonate housing is raintight and operates effectively in extreme environments ranging from -40?F to 158?F. This fixed position lighting control features a 1/2"-14 NPSM threaded stem, facilitating secure mounting to standard electrical boxes or light fixtures. With a tungsten rating of 1800W and a ballast rating of 1000VA, the K4121C provides field-proven performance for contractors seeking a robust outdoor dusk-to-dawn sensor that minimizes maintenance callbacks.
Key Benefits- Load Compatibility: Rated for 15 Amp tungsten and 8.3 Amp ballast, making it compatible with HID, fluorescent, and incandescent fixtures.
- Rugged Construction: Polycarbonate enclosure protects internal components from UV degradation and moisture.
- Reliable Switching: SPST contact form with a "Fail ON" mode ensures safety by keeping lights energized if the sensor fails.
- Simplified Installation: Includes 9-inch 18 AWG wire leads, a washer gasket, and a locking nut for immediate field deployment.
- Precision Sensitivity: Factory calibrated for Turn ON at 1-5 foot-candles and Turn OFF at 3-15 foot-candles.
How do I test the photocell during daylight hours?
To verify operation, cover the cadmium sulfide sensor window completely with black tape or your hand. Because of the integrated thermal delay, the load may take up to two minutes to energize.
What is the proper mounting orientation for this control?
For maximum service life and weather resistance, mount the unit with the wire leads pointing downward to prevent moisture ingress through the threaded stem.
Does this unit work with LED fixtures?
While designed for tungsten and ballast loads, many technicians use the K4121C with LED drivers. However, always ensure the inrush current of the LED array does not exceed the mechanical switch's 8.3 Amp inductive rating.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Intermatic K4121C is a professional-grade 120V stem mount photo control engineered for reliable dusk-to-dawn automation of outdoor lighting systems. Utilizing a mechanical bimetal switch paired with a cadmium sulfide photocell, this unit ensures precise 120 VAC operation across street, perimeter, and parking lot lighting applications. The thermal photocontrol technology includes a built-in 30 to 90-second time delay, which prevents nuisance "cycling" or flickering caused by headlights or lightning strikes. Designed for durability, the sonic-welded polycarbonate housing is raintight and operates effectively in extreme environments ranging from -40?F to 158?F. This fixed position lighting control features a 1/2"-14 NPSM threaded stem, facilitating secure mounting to standard electrical boxes or light fixtures. With a tungsten rating of 1800W and a ballast rating of 1000VA, the K4121C provides field-proven performance for contractors seeking a robust outdoor dusk-to-dawn sensor that minimizes maintenance callbacks.
Key Benefits- Load Compatibility: Rated for 15 Amp tungsten and 8.3 Amp ballast, making it compatible with HID, fluorescent, and incandescent fixtures.
- Rugged Construction: Polycarbonate enclosure protects internal components from UV degradation and moisture.
- Reliable Switching: SPST contact form with a "Fail ON" mode ensures safety by keeping lights energized if the sensor fails.
- Simplified Installation: Includes 9-inch 18 AWG wire leads, a washer gasket, and a locking nut for immediate field deployment.
- Precision Sensitivity: Factory calibrated for Turn ON at 1-5 foot-candles and Turn OFF at 3-15 foot-candles.
How do I test the photocell during daylight hours?
To verify operation, cover the cadmium sulfide sensor window completely with black tape or your hand. Because of the integrated thermal delay, the load may take up to two minutes to energize.
What is the proper mounting orientation for this control?
For maximum service life and weather resistance, mount the unit with the wire leads pointing downward to prevent moisture ingress through the threaded stem.
Does this unit work with LED fixtures?
While designed for tungsten and ballast loads, many technicians use the K4121C with LED drivers. However, always ensure the inrush current of the LED array does not exceed the mechanical switch's 8.3 Amp inductive rating.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
