Cole Hersee Indicator Lights & Engine Warning Alarms

Cole Hersee Indicator Lights & Engine Warning Alarms

When an engine problem strikes on the water or on the road, the difference between a minor repair and catastrophic damage often comes down to one thing: how quickly you get warned. Cole Hersee has been engineering that critical first line of defense since 1924, and their Indicator Lights & Engine Warning Alarms reflect nearly a century of hard-won expertise in heavy-duty electrical design.

Since Cole Hersee was founded in 1924, they have been a pioneer and leader in the development of heavy-duty electrical products for the vehicle industry, earning a reputation for quality and value. That legacy extends directly into their warning alarm and indicator light lineup, where the same engineering discipline applied to switches and solenoids is brought to bear on safety-critical monitoring systems.

Dual-Function Warning Technology

Cole Hersee's warning alarm products are built around a core principle: one alert is good, two are better. The Cole Hersee Dual Alarm Combo is a rugged combination warning light and buzzer that provides audible and visible alerts when there is low oil pressure and high or low engine temperature. This simultaneous two-channel approach means operators receive both a visual cue and an audible signal at the same time — essential in noisy engine rooms or open cockpits where a single-mode alert could easily be missed.

Combination warning light and buzzer units operate simultaneously, providing a 2-way warning of unsafe or hazardous operating conditions, and can be used with non-grounded or self-grounded switches. Typical applications include low oil pressure, low air or vacuum pressure, high or low engine temperature, door-ajar warnings, and hoist alarms — making these units versatile enough for marine, truck, and off-road environments alike.

Corrosion-Resistant Construction for Demanding Environments

Cole Hersee's warning devices and pilot lights are constructed of steel or brass plating to resist corrosion — a critical specification for marine installations where salt air and moisture constantly threaten electrical components. These products are built to resist corrosion, moisture, UV rays, and vibrations, which are common challenges in marine environments. Whether mounted on a boat dashboard or a commercial truck panel, Cole Hersee indicator lights are engineered to endure the conditions that cause lesser components to fail prematurely.

Marine Engine Warning Kits

For boaters looking for a complete, ready-to-install solution, Cole Hersee offers dedicated marine engine warning kits. Designed for inboard and outboard engines with 12V electrical systems, these kits include a warning buzzer, oil pressure switch, and temperature switch — components that continually monitor engine oil pressure and engine coolant temperature. This plug-and-play approach removes the guesswork from safety system installation and ensures the monitored parameters are the ones that matter most for engine longevity.

Universal Compatibility & Broad Product Range

Cole Hersee's alarm buzzers and warning kits include universal buzzers, dual alarms, and dual rate alarms that sound a warning for two different hazardous conditions, with kits available for low air pressure and low oil pressure/high engine temperature. The 12V universal DC buzzer design ensures broad compatibility across a wide range of electrical systems, while 24V variants like the 4124-RD serve commercial and heavy-duty applications that require higher-voltage platforms.

Cole Hersee's LED and incandescent panel lights and pilot lights alert operators when a piece of equipment starts, stops, or requires maintenance, with alarms that include sensors and electromechanical buzzers that can be wired to pilot indicator lights. This flexibility makes it easy to build a customized, layered warning system suited to any vessel or vehicle.

For operators who demand reliability in high-stakes situations, Cole Hersee's indicator lights and engine warning alarms represent a proven, field-tested solution backed by one of the most trusted names in heavy-duty electrical components.