SEAFLO SFWAS1-20-01 12V 95dB Electronic Water Level Alarm 20A
WAS12001
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Solid-state high-water detection for marine compartments
The SEAFLO SFWAS1-20-01 combines an electric-field water-level switch with a visual and audible alarm rated at 95 dB or higher. It is a 12V DC warning system for detecting abnormal water rise in bilges and other boat compartments.
The sealed sensor has no moving float and introduces an approximately three-second delay before signalling, helping reject brief splashes and wave movement. It provides an alarm function only; a separate pump system is required to remove water.
Key design features
- Solid-state electric-field detection with no exposed moving mechanism.
- Sealed electronics help resist corrosion, oil and debris commonly encountered in bilges.
- Approximately three-second activation delay reduces nuisance warnings from splash or momentary water contact.
- Activates at approximately 41 mm water level and deactivates at approximately 9.5 mm.
- Audible output of at least 95 dB plus a visual warning.
- 12V system with a 20 A maximum circuit rating; this is a rating, not the normal alarm draw.
Technical specification
| Manufacturer model | SFWAS1-20-01 |
| Supply voltage | 12V DC |
| Maximum circuit rating | 20 A |
| Alarm output | Audible alarm ≥95 dB plus visual indicator |
| Sensor | Sealed electric-field bilge switch |
| Signal delay | Approximately 3 seconds |
| Activation level | Approximately 41 mm (1.6 in) |
| Deactivation level | Approximately 9.5 mm (0.37 in) |
| Switch wiring | 18 AWG, approximately 1000 mm |
| Alarm wiring | 28 AWG, approximately 150 mm |
| Net weight | Approximately 0.2 kg |
Compatibility and installation checks
- Use only on a 12V DC marine electrical system; select the corresponding 24V product for a 24V installation.
- Suitable for leisure boats, yachts, RIBs, fishing boats and workboats with a clean, accessible mounting surface at the required warning level.
- Mount the sensor in the orientation stated by the installation instructions and test it with water before relying on the system.
- Route wiring above normal bilge water, protect connections against moisture, and fit circuit protection appropriate to the installation.
- Position the alarm where it can be seen and heard from the normal operating area.
- Package contents: electric-field level switch and alarm assembly. Main cable, fuse and installation consumables may be required.
Frequently asked questions
Does this product operate the bilge pump?
Its primary function is high-water detection and warning. Design the pump-control circuit separately unless the installation documentation explicitly confirms a compatible control arrangement.
Is the sensor a conventional float switch?
No. It is a sealed electric-field sensor with no moving float.
Will wave movement cause constant alarms?
The three-second delay helps reject momentary splashes, but correct mounting remains essential.
Can I install it on 24V?
No. This unit is the 12V version; do not connect it directly to 24V.
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