Features:

  • Non-drift silicon light sensor with IR filter
  • DC relay with zero-crossing circuitry for extended life
  • Conformal coated PCB
  • Exceeds 10, 000 on/off switching cycles
  • Ideal for single or multi-fixture HID and LED installations (up to 1650 W at 277 VAC)
Premium Quality Electronic Photo Control that Saves Energy

The Intermatic EK4036S was used to replace a Tork 2001 photocell (after modifying the existing outdoor box/cover installation). While the Tork was reliable and installed only 2 years ago, it would always activate earlier than necessary at dusk and stay on later than required at dawn, meaning almost one hour of wasted energy at each sunset and sunrise. Although the Intermatic is somewhat pricey, it does not have this drawback and operates as expected thereby saving energy. Instead of purchasing a cheap photocell, do yourself a favor and purchase this Intermatic EK4036S (or any of their other EK Series Select Grade Electronic Photo Controls) that will pay for itself in a short period of time. Highly recommended.

Increased light sensitivity huge help!

I have a Well Water purification system that used an ALR AA-105 sensor (similar to this model) to detect if the UV light was on or not, and if not fire a buzzer. Its 20 years old and I guess the portal is a little dirty inside and the AA-105 would not fire - so the buzzer was on all the time and I had to disconnect it. Voilá - the EK4036S works like a charm - alarm now functional again! In addition, the AA-105 even when working can take 2 minutes to switch off, meaning at best I'd have several minutes of buzzing on any power cycle. This unit switches off (detects the light) in just a few seconds. Fantastic!

An Excellent Solution to a Common Problem

Finally, a photocell that doesn't turn lights on too early/off too late. This sensor uses an electronic sensor/board. Traditional photocells are "photothermal" using a photo in series with a small internal heater. A bimetal strip makes/breaks the load. This photocell is WAY more sensitive than tradional designs. It doesn't switch on until daylight is under 5w per square meter. Traditional photocells we're turning on the lights at 200 watts per square meter. On some cloudy days the traditional photocells never turned the light off. Awesome product, highly recommend.

Works well with minimal hysteresis...

I set out to build my own dust collection drum level sensor since commercially manufacturer devices can be pricey. I used this sensor, a DPDT relay and a contactor to do the job. As for this component, it has no delay when darkness is detected and 5 seconds of delay when light returns to the surface of the sensor. This amount of hysteresis seems to work great for my target application. I used a fairly tall LED candelabra-style bulb so that when it gets covered with dust the photo control will immediately cause a chain reaction that ultimately disconnects the power to my blower motor - the circuitry also lights a red light to indicate a full bin. I'm sure this sensor would work great to turn on and off lights automatically as well. I've only had it in service for a handful of days. I drilled a hole in the lid of my drum, inserted the sensor and screwed on the retaining ring. The gasket does a good job preventing any air leaks through the hole.

Ask me in Ten Years how it is working

Standard Size, simple installation. I like the idea of the zero crossing detection reducing the surge current when turning on the post light. I paired this with a

Automate security lights

Super easy to install. Regulates your outdoor lights to always be on when it’s dark but never when not needed. This model will also work on LED fixtures.

Easy replacement.

Fixed the problem I had where a 10 year old sensor was turning on much too early each day.

Excellent

Does what it's supposed to do...does it consistently, reliably, and handles LEDs perfectly without any flickering, etc. issues. Time will tell the longevity story, but off to a great start.

Good quality

The photocell installed well and is working just fine. It is of way better quality than the box store units I tried previously. No complaints.

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