HOLDING TANK SENDER (S3H)
- 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 us to fit far more switches inside the senders, giving the 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.
All of our holding tank senders work on the 240-30 ohms resistance range. Senders and gauges must have the same resistance range.
There are also four sizes of holding tank senders available with a 0-10 volt output.
Here you can find answers to some popular questions, for anything else please contact us by email or by phone and we'll be happy to help.
- How to identify and order a new or replacement level sender
- What is NMEA 2000?
- How to decide the length of a sender
- What's the difference between the S3 and S5 senders?
- How to test a sender
- How to test a gauge
- What's the difference between European and American resistance?
- Connecting two senders to one gauge
- Connecting two gauges to one senders
- Tachometer FAQ's
- Replacing a floating arm sender
- Sender Identification Chart
- Discontinued Senders - a list of discontinued senders