Thermal Photocontrol K4236C 120-277V Stem and Swivel Mount - Reliable

Our review of the Intermatic K4236C finds it best suited for installers and facility managers who need a simple, dependable dusk-to-dawn switching device. The single biggest reason to buy is its thermal-type control with built-in delay action, which prevents nuisance switching from transient light sources such as car headlights and lightning. In this review the unit's stem-and-swivel mounting, robust polycarbonate housing, and temperature-compensated bi-metal design stand out as practical features for outdoor lighting circuits that require reliable operation across a wide ambient temperature range.

Key Features

• Thermal-type control: Provides dusk-to-dawn switching with a delay action that reduces false turn-offs from brief light spikes such as headlights or lightning.
• Stem and swivel mounting: Allows flexible installation angles so the photocell can be oriented for best light detection on poles or fixtures.
• Multi-voltage compatibility: Available for 120V or 208-277V systems so it fits a wide range of commercial and industrial circuits.
• Sealed polycarbonate case: Sonic-welded case and lens seal out moisture for long-term outdoor durability in exposed installations.
• Temperature-compensated sensing: Dual bi-metal and composite resistor design maintains reliable operation over extreme ambient temperatures.
• Cadmium sulfide photocell: Proven photocell technology delivers consistent light sensing behavior for dusk-to-dawn control.

Who It's For

The K4236C is aimed at electricians, contractors, and maintenance teams installing or replacing outdoor lighting controls in commercial, municipal, or industrial settings where reliability and resistance to false switching are priorities. Its stem-and-swivel mounting makes it a good choice for retrofits where orientation needs to be adjusted without changing the fixture.

Those seeking smart networked controls, dimming, or programmable schedules should look elsewhere, as this unit is a straightforward thermal photocontrol designed for on/off dusk-to-dawn operation rather than advanced automation or remote management.

Pros & Cons

Pros

• Reliable dusk-to-dawn switching with a delay to avoid nuisance trips from short light bursts.
• Rugged, sonic-welded polycarbonate housing resists moisture for outdoor use.
• Works across common voltages (120 or 208-277V), simplifying inventory for mixed sites.
• Stem and swivel mount speeds installation and allows precise sensor orientation.

Cons

• Simple on/off functionality means no remote control or scheduling features for advanced installations.

Specifications

Manufacturer	Intermatic Incorporated
Model	K4236C
Type	Thermal photocontrol with stem and swivel mount
Voltage	120 or 208-277 V
Photocell	Cadmium sulfide sensor
Housing	Sonic-welded polycarbonate case and lens
Country of Manufacturer	Mexico

Our Verdict

The Intermatic K4236C is a pragmatic choice for anyone needing a durable, no-nonsense dusk-to-dawn photocontrol that resists false triggers and performs across temperature extremes. Installers will appreciate the stem-and-swivel mount and broad voltage compatibility, making it good value where dependable on/off control is the requirement rather than advanced networked features.

Frequently Asked Questions

Does this unit work on different voltages?
Yes, the K4236C is available for 120 V or for 208-277 V systems to match common commercial circuits.

Is the housing weatherproof?
Yes, the sonic-welded polycarbonate case and lens are designed to seal out moisture for outdoor installations.

Will it prevent switching from brief light flashes?
Yes, the thermal-type control includes a delay action specifically to avoid loads switching off due to headlights or lightning.