S3H Black Waste Sender Kit.
Comes with a sender, gauge and stainless steel fitting flange.
Screws into an 1 1/4″ BSP fitting flange for quick and easy removal.
Suitable for either 12v or 24v.
Stands 45mm above tank top (including fitting flange).



S3H Black Waste Senders


S3H Black Waste Sender Kits

  • For black water
  • 316 stainless steel
  • 1 1/4″ BSP thread fitment
  • 12v/24v
  • 240 ohms (empty) – 30 ohms (full)
  • Simple to fit, remove and clean.

Robustly made from 316 stainless steel and fitted as original equipment for over 30 years by all the major British and European boat builders, our senders still work on the simple principle of twin magnets in the float tripping a series of reed switches securely housed, and doubly insulated inside the stainless tube.

Over the years senders have been improved with advances in reed switch technology, allowing  far more switches to be fitted inside the senders, giving a better resolution required by modern digital displays.

The holding tank senders are surrounded by a removable 316 stainless steel cage to protect the float from the worst of the black water.  If necessary this is easily removable for cleaning.


Additional information

Weight1.1 kg
Length (mm)

100, 205, 305, 410, 510, 650, 700, 760

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