Reliable automatic float switch designed for marine bilge pump control. The TMC-08121 from TMC is a compact, spark-proof plastic float switch that converts a 12V or 24V bilge pump into an automatic on/off system — ideal for small boats, yachts, and marine applications where dependable low-level water detection is required.

Key Features

Automatic water-level activation with running-ball contact type micro-switch (non-mercury), supplied with approximately 1 metre of lead for easy installation. The unit is described as economical yet durable, with a corrosion-resistant plastic housing suitable for typical bilge environments.

Specifications

• Model: TMC-08121 (SKU: 020-948).
• Voltage: DC 12V – 24V (suitable for 12V and 24V bilge pumps).
• Switch-on / Switch-off levels: ≈40 mm ON, ≈5 mm OFF (low-level detection for early sump/bilge activation).
• Current rating: listings vary — commonly shown as 10 A max on some supplier pages and 15 A on others; verify against your pump’s draw before pairing.
• Dimensions (approx): length 116 mm × width 72 mm × height 82 mm; mounting screw hole ∼5 mm.

Why Choose This Float Switch?

Perfect as a bilge pump accessory or water-level sensor for marine safety systems, the TMC-08121 provides simple, reliable automatic bilge control and helps protect boats from low-level flooding. Use keywords like “bilge pump float switch,” “automatic bilge control,” and “marine water level sensor” when optimizing product listings or online stores to improve search visibility