The Projecta 4M Extension Cable For Water Sensor gives you an extra 4 metres between your tank and gauge so you can run the sensor from drawbar to rear bar on a camper around 4–6 metres long. The cable suits setups where the tank lives under the floor and the display is up at eye level, so you can still keep an eye on water while towing on 12V systems. The outer sheath is a flexible plastic jacket that handles the usual bumps and dust you see on corrugated roads and gravel tracks. The 4 metre length keeps joins to a minimum, which helps keep signal wires tidy in trailers, vans or canopies. Plug style ends match the Projecta water sensor harness so you avoid cutting and crimping. It is simple, practical gear for anyone wanting a smart buy add-on to their existing Projecta water monitoring kit.

• Genuine Projecta 4 m extension cable for water sensor systems
• Adds an extra 4 m between tank sensor and gauge or control unit
• Supplied as a single pre-assembled cable length
• Fitted with plug-style connectors on both ends for straightforward connection
• Intended for low voltage 12V style water level monitoring circuits
• Flexible outer sheath suitable for routing along chassis rails or interior panels
• Light weight cable helps keep overall touring payload down
• Ideal for caravans, camper trailers, motorhomes and canopy builds
• Allows relocation of display panels without moving water tanks
• Simple add-on accessory to expand existing Projecta water sensor gear

Q: Can I use this 4 m extension cable without modifying my existing Projecta water sensor wiring?

Yes, the cable includes matching plug-style connectors. You plug one end into the existing sensor harness and the other into the gauge lead. No cutting or crimping is required when the connectors already suit your kit. This keeps the wiring neater and helps with troubleshooting later. It also means you can remove the cable if you change your setup.

Q: Is the cable suitable for 12V caravan and camper water level systems?

Yes, the cable is intended for low-voltage water sensor circuits. Projecta water monitoring gear normally runs on 12V systems found in caravans, campers and canopy setups. The conductors carry only the small signal load from the sensor. That makes routing simpler than heavier power cables. You should still keep it away from sharp edges and hot exhaust components.

Q: Where should I route the 4 m extension cable on a trailer or van?

Run the cable along existing chassis rails or internal cavities. Using existing paths helps protect the sheath from stones and moving suspension parts. Many installers follow other low-voltage looms along the frame. Cable ties or clips every few hundred millimetres help reduce movement and wear. Avoid tight bends around edges so the outer jacket stays in good condition.

Q: Can I shorten the cable if 4 m is too long for my setup?

You can coil excess length instead of cutting it. Coiling lets you keep the original plug connectors intact. Cutting and rejoining adds extra join points that may introduce faults later. If you do coil it, secure the loops with cable ties so they do not rub on sharp metal. Leaving the factory connectors untouched also helps with warranty support on the rest of your gear.