Engine overheating is one of the most common and costly causes of engine failure in 4×4 vehicles and marine engines.
In many cases, the root cause isn’t mechanical failure — it’s something far simpler and more dangerous: low coolant level.
The WL601 Low Water Level Alarm from Bolec Electronics is designed to detect coolant loss early and warn the operator before serious damage occurs.
The Problem: Engine Overheating Due to Low Coolant
Coolant loss can happen suddenly due to hose failure, leaks, cracked radiators, or loose fittings. Unfortunately, factory temperature gauges often react too late, once the engine temperature has already risen to damaging levels.
Relying on staff or operators to perform regular manual checks is not always practical — especially in remote, marine, or off-road environments.
Why Manual Checks Aren’t Enough
Coolant can be lost suddenly, without warning
Human error or missed inspections are common
Operators may not notice a problem until overheating occurs
Engine damage can happen within minutes
Once overheating starts, the cost can include warped heads, blown gaskets, or complete engine failure.
The Bolec Solution: WL601 Low Water Level Alarm
The WL601 provides an early warning system by continuously monitoring the coolant level inside the radiator.
Installed directly into the radiator, the WL601 detects when coolant drops below a safe level and immediately alerts the operator with:
Audible alarm
Flashing LED warning
This ensures the operator can shut down the engine before overheating and damage occur.
Typical Applications
4×4 touring and off-road vehicles
Marine engines
Agricultural and industrial engines
Remote or unattended engine systems
In harsh or remote conditions, the WL601 acts as a critical safeguard when visual checks are not possible.
Key Benefits
Early warning of coolant loss
Prevents engine overheating
Protects engines from severe and costly damage
Reduces reliance on manual checks
Simple installation and reliable operation
Peace of Mind, Wherever You Operate
Whether you’re navigating remote tracks, operating a marine engine, or managing critical equipment, the WL601 Low Water Level Alarm provides reliable protection when it matters most.
By detecting coolant loss early, it gives operators the chance to act — saving time, money, and engines.
For more information or to enquire about the WL601, contact Bolec Electronics or visit www.bolec.com.au