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Intermatic K4321C 120-Volt Fixed Position Photocontrol with Wall Plate

4.4 out of 5 stars 208 customer reviews
| 28 answered questions

Price: $15.11 & FREE Shipping on orders over $49. Details
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120VAC with wallplate
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  • Fits standard outlet box, post lamp or wall packs
  • K4321 includes weatherproof wall plate with neoprene gasket
  • UL listing applies to entire plate assembly
  • Equipped with 3/8-Inch-18 threaded side mounting, locking nut, and washer gasket
  • 9-Inch leads
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  • Intermatic K4321C 120-Volt Fixed Position Photocontrol with Wall Plate
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Product Description

Style: 120VAC with wallplate

Product Description

  • Brand: Intermatic
  • -
  • Part No.: K4321C
  • -
  • Voltage: 120
  • -
  • Length: 1.8125 in.
  • -
  • Width: 2.75 in.
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  • Height: 4.5 in.
  • -
  • Depth: 0.8125 in.
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  • Mounting: Fixed Position
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  • Watts Ballast: 10

From the Manufacturer

Designed to fit into a standard outlet box, a post lamp or wall packs. Model K4321 includes a weatherproof wall plate with neoprene gasket. The UL listing for this model applies to the entire plate assembly when properly mounted to an approved outdoor junction box. All other models are equipped with a 3/8-Inch-18 threaded side mounting, locking nut and washer gasket. All models have 9-Inch leads.

Product Information

Style:120VAC with wallplate

Technical Details

Part Number K4321C
Item Weight 4.8 ounces
Product Dimensions 6.5 x 3.1 x 1.8 inches
Item model number K4321C
Color Gray
Style 120VAC with wallplate
Finish Gray
Material Intermatic K4321C 120-Volt Fixed Position Photo Control with Wall Plate
Power Source wired electric
Item Package Quantity 1
Number Of Pieces 1
Certification UL
Warranty Description 5 Year

Technical Specification

Warranty [pdf ]

Additional Information

ASIN B000BQR0BU
Customer Reviews
4.4 out of 5 stars 208 customer reviews

4.4 out of 5 stars
Best Sellers Rank #22,039 in Home Improvements (See top 100)
#2 in Industrial & Scientific > Industrial Electrical > Sensors > Photoelectric Sensors
Shipping Weight 4.8 ounces (View shipping rates and policies)
Date First Available April 6, 2006

Warranty & Support

Product Warranty: For warranty information about this product, please click here. [PDF ]

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Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Style Name: 120-Volt Verified Purchase
Was burning out CFLs like crazy on my garage lights, where is the alleged energy savings when your CFLs only last a couple of months? This control works with CFLs, they come on quickly, none of the flickering when turning on and off that I had before. No bulbs burned out since I installed this. One glitch, the instructions say to wire this in before the switch. Since my lights and sensor were already installed, I had to put this controller between the switch and the lights (load). I would have had to completely re-wire the lights to do it the way the instruction diagram showed. It worked perfectly fine as you would expect, but just be aware that the provided wiring diagram might not look right when you are installing it. No complaints.
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Style Name: 120-Volt Verified Purchase
The Intermatic brand has proven to me to be one of the better photo-cells. They seem to be most sensitive to daylight and my post lamp is one of the last to come on in the evening and first to go off in the morning, in my neighborhood. The K4021C is a neat & compact unit that I have installed directly in the lamp post. If possible, aim the lens as close to due north as you can, for best sensitivity.

R.E.W.
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Style Name: 120-Volt Verified Purchase
For some reason most dusk-to-dawn exterior light fixtures are incredibly ugly. The kind of things you'd mount on a barn for security, not the kind of thing you'd want hanging of the front of a nice home. So I bought this device and integrated into a decent looking sconce near the patio door of our house. I mounted it to the outside of the fixture on a side that no one will see - but there are lots of other ways to do it. Device works great with the CFL bulb we installed. Wiring instructions are clear and if you're a bit handy you won't have a problem if you can visualize how to integrate the device so it gets good indirect sunlight to function properly.
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Style Name: 120-Volt Verified Purchase
I've had this new guy installed for about 3 months now... the cold wet and snowy months (Nov, Dec, Jan) and it's holding up just fine.

UPDATE... As of February 1st, this photosensor no longer works... The last one worked for 40 years, and this one barely lasted 5 months installed.
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Style Name: 120-Volt Verified Purchase
I bought this sensor to replace a failed sensor in my Lights of America 9050 50 Watt High Pressure Sodium Wall Light, Bronze. On the light, one of the wires had become disconnected. When I went to investigate, the original sensor shatterd in my hands like a crystal figurine. I thought the light was garbage. Then I happened upon this little sensor. For under seven bucks I was able to make this light work like new again. This sensor seems to be functioning even better than the original which is now considered obsolete (I tried buying one). This is definately recommended.
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Style Name: 120VAC with wallplate Verified Purchase
This unit will not work well in shaded areas. The photo cell sensor is placed too deep in the tube and must have direct light to turn the circuit off. I had to buy a cell with sensor a the tip of the tube to work properly. Available at Lowe's.
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Style Name: 120VAC with wallplate Verified Purchase
I really like this photo-electric cell. I had considered a motion detector, however, during the winter when the bulbs are COLD, CFLs take so long to warm up that actor that triggered it would be long gone. With this device, the lights are on all night, but I'm using CFLs (maybe LEDs) in the future, and the cost of the electricity is minimal. It also helps that I have a completely SOLAR electrical home and I can't use enough electricity to raise my monthly bill above the $2.50/month service charge.

Also, I removed the photo switch from the cover plate and inserted it in an available home on an existing light box. All I can say is that it goes on and off as I would expect. It is totally unobtrusive and doesn't draw anymore visual attention than the normal plug for the unused hole would.

For reference, four large CFL floods (each 100W equiv) on the line and this is well within the limits of this device.

I will buy additional cells as needed.

Good product
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Style Name: 120VAC with wallplate Verified Purchase
Bought this to replace dusk-to-dawn bulbs that kept burning out. It is attached on the inside of an outdoor garage light fixture (see photos). Since the light fixture base was a bit too thin, I added a home-made wooden ring to the base (which can be seen in two photos). Then simply mounted it to the garage stucco (nailed with 2" brads via nail gun, caulked and painted). Once I am confident the unit works consistently, I will run a light coat of clear caulk around the fixture base to the wooden ring and spray paint the screws. Venting was not added because the inside outlet box vents to the garage. NOTE: I did not use the cover plate.

If all goes well, we won't be buying anymore dusk-to-dawn bulbs, and I will add another unit for the other garage light. Total cost w/o the cover plate $10 and my free labor.
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