The UNS-VA/SB4 Bilge Guard is a heavy-duty bilge level switch built for marine and industrial use that monitors bilge levels reliably without a test function. It features a plastic (PE) float and a stainless-steel body engineered for durability and resistance to harsh environments. Designed for top mounting, it can handle up to 3 bar operating pressure. The switch delivers a single switching contact and is available with marine and classification approvals (e.g. DNV, BV, ATEX upon request). Typical applications include shipbuilding, yacht systems, and sewage / drainage control where reliable bilge monitoring is essential.
Features
UNS-VA/SB4 Bilge Level Switch Guard with Plastic Float Features:
- For mounting through top
- Without test function
- Rugged and sturdy design
- Mounting bracket
- 1 switch contact
- Approvals: DNV, BV, ATEX on request
Specifications
UNS-VA/SB4 Bilge Level Switch Guard with Plastic Float Specifications:
| Specification | Description |
|---|---|
| Materials – Stem, Bracket, Float Chamber | Stainless steel |
| Materials – Float | PE |
| Materials – Cable | Polymer, halogen-free, UL-V0 |
| Materials – Cap Nut | PA |
| Operating Pressure | Max. 3 bar (float / +20 °C) |
| Temperature Range | -20 °C … +70 °C |
| Fluid Specific Gravity | Min. 0.80 g/cm³ |
| Immersion Depth at Density 1 | 28 ±2 mm, L1 ~18 mm |
| Immersion Depth at Density 0.8 | 35 ±2 mm, L1 ~11 mm |
| Mounting Position | Vertical ±15° |
| Protection Class | IP67, IP68 |
| Electrical Connection | Polymer cable, 2 × 0.75 mm² |
| Cable Length | 2 m / 5 m / 10 m / 15 m |
| Contact Type | SPST switch (NO) (marking at bottom); By turning float upside down: SPST switch (NC) (marking at top) |
| Contact Rating | Max. 230 V AC/DC, max. 2.0 A, max. 40 VA/W |
| Weight | SB4: approx. 175 g / SB5: approx. 180 g |
| Approvals | DNV, BV, RINA, LR |
| EX Approval | IECEx TUN 17.0039X; TÜV 18 ATEX 214370 X II 1 G Ex ia IIC T6 Ga or II 1/2 G Ex ia IIC T6 Ga/Gb or II 2 G Ex ia IIC T6 Gb or II 1 D Ex ia IIIC T100°C Da |
Applications
UNS-VA/SB4 Bilge Level Switch Guard with Plastic Float Applications:
- Shipbuilding
- Yachtbuilding
- Sewage treatment plant
Q & A
UNS-VA/SB4 Bilge Level Switch Guard with Plastic Float Q & A
The switch uses a SPST contact: normally open (NO) when the float is at the bottom, and normally closed (NC) when turned upside down. Contact rating is max. 230 V AC/DC, 2.0 A, 40 VA/W.
Downloads
Download Barksdale UNS-VA/SB4/SB5 Bilge Level Switch Guard Datasheet
Contact us at (855) 737-4714 to learn more or fill out our online form.