Hanla FMS-2V-WS-T Float Level Switch SPDT 16A 250VAC

Hanla FMS-2V-WS-T Float Level Switch SPDT 16A 250VAC

The Hanla FMS-2V-WS-T is a vertical float level switch engineered specifically for harsh shipboard fluid monitoring applications. Manufactured by Hanla Level Co., Ltd. (South Korea), this unit utilizes a magnetic coupling actuation mechanism designed to keep electrical contacts fully isolated from process media.

Commonly configured as a Level Alarm High (LAH) sensor for cargo hold bilge wells, engine room bilge tanks, drain wells, and void spaces, the FMS-2V-WS-T delivers fail-safe signaling under heavy vibration, rolling, and pitching. Featuring a robust mechanical design rated to 10 kg/cm² working pressure and 180°C operating temperature, it reliably handles oily water, fuel slops, and contaminated bilge liquids without false switching.

Model Details:

• Manufacturer: Hanla Level Co., Ltd.
• Model Code: FMS-2V-WS-T
• MPN: FMS-2V-WS-T / FMS2VWST
• Design Breakdown:
  • FMS Series: Float Magnetic Switch (Marine Grade)
  • 2V: Vertical top-mounted float arrangement
  • WS: Water / Sludge / Bilge Well configuration (fitted with internal counter-buoyancy and slosh/guide protection)
  • T: Integrated Test Lever / Test Mechanism for manual SOLAS operational verification

Technical Details

Features

1. High-Capacity Microswitch Contact: Equipped with a genuine 16A @ 250VAC rated Single-Pole Double-Throw (SPDT) snap-action contact, enabling direct actuation of high-power bilge alarm circuits, auxiliary relays, and pump starter contactors without interposing switches.
2. Built-In Manual Test Device (“-T” Lever): Facilitates routine safety checks, PSC (Port State Control) inspections, and class-mandated surveys by manually raising the internal float arm from outside the tank housing without breaking the seal.
3. Hermetic Magnetic Coupling: Isolates the terminal junction housing from the wet well, eliminating the risk of gas, moisture, or liquid ingress along the float shaft.
4. Harsh-Environment Marine Construction: Built with an IP56 die-cast marine-grade terminal enclosure and SUS304/SUS316 wetted components to resist corrosive saltwater, fuel residue, and abrasive bilge slurry.
5. Standard JIS Marine Flange Mounting: Standardized bolt pitch allows drop-in replacement into pre-existing deck standpipes and bilge well flanges across global shipyards.

Compatible Marine Systems

• Engine Room Monitoring Systems: Kongsberg K-Chief, Nabtesco, Praxys Automation, Marine Technologies, Decca ISIS.
• Dedicated Bilge Ingress Systems: Solas Regulation XII/12 water level detector panels for bulk carriers.
• Pumping Plant Controls: Automatic start/stop circuits for oily water separator (OWS) feed pumps and bilge eductors.

Applications

• Cargo Hold Bilge Wells: Level Alarm High (LAH) and Level Alarm High-High (LAHH) warning systems.
• Engine Room & Shaft Alley Bilges: Bilge well accumulation monitoring.
• Cofferdams, Pipe Tunnels & Void Spaces: Ingress detection in dry compartments adjacent to sea chests or fuel tanks.
• Drain & Drip Trays: Fuel oil purifier room drip pans and sludge collection tanks.

Frequently Asked Questions

What is the primary difference between Hanla FMS-2V and FMS-2H?

The 2V designation represents a vertical top-mounted switch designed for bilge wells, sump tanks, and top-access coamings. The 2H is a horizontal side-mounted switch intended for side-shell installation across expansion, service, and settling tanks.

Can the FMS-2V-WS-T be wired directly to start a bilge pump?

Yes. With an SPDT contact rated at 16A @ 250VAC, it can directly energize magnetic motor contactor coils, intermediate relays, or high-decibel alarm horns without needing external amplification modules.

How do I manually test the switch during class survey inspections?

Actuate the external test lever mounted on the switch body. The mechanical linkage elevates the float assembly inside the well, engaging the internal magnet and tripping the SPDT microswitch to simulate high bilge level.

Is this float switch suitable for heavy fuel oil or thermal fluid tanks?

Yes. The unit is rated for process temperatures up to 180°C and pressures up to 10 kg/cm², making it fully suitable for high-temperature sludge, drain, and fuel recovery installations within stated specific gravity limits.