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Intermatic K4221C - Photo Control - Thermal Type Photocell - Stem and Swivel Mounting - 120 Volt

K4200 Series - 1/2 in. - 14 threaded swivel, 1 9/16 in. (4.0 cm) Square, 5 1/2 in. (14.0 cm) Long


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Intermatic K4221C - Photo Control - Thermal Type Photocell - Stem and Swivel Mounting - 120 Volt

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Additional Information

Brochures & Specific Sheets

Stock Code K4221C
Brand Intermatic
Family Stem and Swivel Mounting - Thermal Type - Photo Controls
UPC 078275002029
Voltage (V) 120VAC
Length (in) 5.5
Width (in) 1.5625
Depth (in.) 1.5625
Watts Ballast 1000 Watts
Watts Tungsten 1800 Watts
Mounting Stem and Swivel Mounting, 1/2 in. - 14 Threaded Swivel
Start Temp. (Min) -40 Deg. F
Start Temp. (Max) 150 Deg. F
UL Listed CSA and UL Listed
Case Quantity 1
Notes For additional options and special quantity discounts, please contact our sales department 1-(855)-296-9508 x 101 or send email to
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This Intermatic K4221C thermal type photo control provides dusk-to-dawn lighting control of security lights, walkway lights, and flood lights and features a delay action, which prevents lights from switching off due to lightning or car headlights. This stem and swivel mounting photocell features a light level slide, which reads daylight watts between 1000 and 1800 and functions in temperatures from -40 degrees to 158 degrees Fahrenheit. With a standard 1/2-inch stem with 14 threads and 6-inch leads for safe and secure mounting, this photocell comes with a nut and a washer to complete installation, and also features a sonic-welded polycarbonate case and lens to seal out moisture, ensuring your unit is protected from the elements. With a dual-temperature compensating bi-metal and composite resistor to withstand temperature extremes, this photocell is a great choice for your photo control needs. The unit works on 120 volt systems.

Model Overview:

  • Cadmium sulfide photocell
  • Sonic welded polycarbonate housing and lens to seal out moisture
  • Delay action eliminates load switching OFF due to car headlights, and lightning
  • 6" leads
  • K4251 and K4253 Models are designed for spot/flood type fixtures
  • Controls come with a washer gasket and locking nut

Customer Reviews

good brand to recommend. Review by Don
very flexible to use, easy to install. (Posted on 16-01-09)

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