FL301 Gauge Alarm – 12V / 24V
Product Overview
The Bolec FL301 is a compact multifunction alarm module designed to trigger an alarm or relay output when a gauge reading passes a preset point.
It can be set to switch on either a rising or falling signal, making it suitable for many automotive, marine, industrial and engine protection applications.
Ideal for adding a warning light, buzzer or relay output to an existing gauge and sender setup without changing your original gauge wiring.
What’s Included
- 1 x Bolec FL301 Gauge Alarm Module
- Terminal
- Terminal block
Typical Uses
- High engine temperature alarm
- Low engine oil pressure alarm
- Low fuel level warning
- Low gearbox oil pressure alarm
- Low air bag pressure alarm
- Thermatic fan switch control
Why Buyers Like It
- Works on both 12V and 24V systems
- Fine adjustment with set point control
- Adjustable hysteresis helps reduce nuisance switching
- Can be used with gauge + sender or sender only
- Compact size for easy mounting under dash or in a panel
Key Features
Specifications
| Dimensions | Approximately 88 x 42 x 29mm |
| Voltage | 12 – 28 VDC Negative Ground |
| Current Draw | 3mA alarm off, 90mA alarm on |
| Adjustment Range | 2kΩ |
| Contact Rating | 30VDC 1.0A Resistive |
Installation Notes
- Connect to switched ignition positive and ground
- Piggyback to the sender terminal on your gauge
- Output can drive a lamp, buzzer or relay coil
- Compact enough for under-dash or panel mounting
Important Note
This module is designed for systems using a variable resistance sender / variable voltage signal.
If the gauge or sender fails, the module will not operate correctly.
Reliable Bolec engine and gauge protection
A practical solution for adding an adjustable alarm to temperature, oil pressure, fuel level and other gauge-based systems.
Ratio Switch Settings
Specsheet: Download PDF
