Fog Horn Controller – Automatic Horn Management for Marine Vessels

The Fog Horn Controller is an essential component of the ship's navigational safety equipment. Designed to automate the sounding of the fog horn based on ambient light conditions, this controller ensures compliance with international collision regulations during periods of reduced visibility. When daylight fades or visibility drops, the built-in photocell triggers the horn to sound in the correct pattern, allowing the crew to concentrate on other critical tasks.

Featuring a reliable manual override, the controller can be switched to automatic or manual mode depending on the situation. The adjustable timing and delay settings allow for precise control of the horn's interval and duration. Housed in a rugged, waterproof enclosure, the fog horn controller is built to withstand the harsh marine environment, providing years of dependable service on all types of vessels.

Key Features

Technical Specifications

SpecificationDetail
Power Supply12/24V DC (9-32V range)
Output Relay10A @ 125VAC / 5A @ 24VDC
Light SensorBuilt-in photocell (LDR)
Operating ModesAutomatic / Manual / Off
Timing AdjustmentOn-delay and duration adjustable
Enclosure RatingIP65 (dust-tight and water-jet proof)
MountingPanel or bulkhead
Dimensions120 x 80 x 45 mm (approx.)
Weight0.5 kg (approx.)
Operating Temperature-20°C to +55°C

Frequently Asked Questions

How does the fog horn controller automatically activate the horn?

The controller uses a built-in photocell that detects the level of ambient light. When illumination falls below a preset threshold, it automatically switches on the horn, and when daylight returns, it switches off. Certain models also support timed intervals to comply with rules.

Can I use this controller with any type of fog horn or whistle?

The controller's relay output is compatible with most electric fog horns and whistles, provided the horn's current draw does not exceed the relay rating. For inductive loads, a suppressor might be needed.

Is manual operation possible?

Yes, the controller includes a manual override mode that allows the crew to sound the horn immediately or keep it off, regardless of light conditions.

What is the supply voltage range?

The controller operates on a universal 12/24V DC supply, making it suitable for ships with either 12V or 24V electrical systems. The input range typically spans 9-32V DC.

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