35 in stock
SVB price: €47.86
Excl. VAT, excl. shipping costs.
This is a NET-price excluding German VAT. Shipments to countries outside of the EU may be subject to import duties and taxes.
€47.86 This is a NET-price excluding German VAT. Shipments to countries outside of the EU may be subject to import duties and taxes.
Item no.
Model no.
JOHNSON - ULTIMA SWITCH electronic float switch / 20 A

Product details

JOHNSON's UltimaSwitch electronic float switch features micro-electrical detector cells that detect disruptions caused by water and other fluids. The cells are completely corrosion resistant and are not affected by oil or other foreign debris. The switch activates the pump when the water level reaches 50 mm or more and switches it off again when the water level drops below 20 mm. An eight second delay prevents false starts.
The UltimaSwitch switch is a highly reliable, contactless switch with no mechanical parts or toxic mercury that touch the water level and automatically controls a 12 or 24 V DC bilge pump.

  • Suitable for 12 and 24 V
  • For all submersible pumps up to 20 A
  • Standby current: 10 mA @ 12 V
  • Dimensions (HxWxD): 62 x 85 x 29 mm
  • Cable cross section: 1.3 mm²
  • Cable length: 762 mm
  • Material: ABS
  • No moving parts
  • No mercury

Installation note
The two connection cables of the UltimaSwitch are clamped onto the positive line of the bilge pump. The UltimaSwitch has NO direct negative connection !!!
The brown/white wire with the red flag [FASTEN TO (+) POWER ONLY] is connected to battery positive,
the brown line with the white flag [FASTEN TO PUMP (+) ONLY] is connected to the positive connection line of the bilge pump.


multi-flag Manual
PDF, 256,61 KB

What other SVB customers have to say

100% real reviews

10 customer reviews

by GUEDES J. Flag of Portugal 2/13/2023 Verified purchase
Very easy to mount and connect.
To mount in the bilge
Bernard T.
by Bernard T. Flag of France 10/25/2022 Verified purchase
it is the 2nd for the 2 front and rear bilge pumps
Silvester R.
by Silvester R. Flag of Germany 7/3/2019 Verified purchase
Perfect service SUPER advice, fair price, gladly again
View all ratings

Rate product

How would you rate this product?
Completely fails to meet my expectations
Only some expectations are met
Meets my basic expectations
Slightly better than my general expectations
Fully exceeds my expectations
Click on the stars to rate

Customers ask customers

Ask other SVB customers who have already purchased this product from us about their experience.

Your question will be automatically forwarded to other SVB customers and published on the product page. Please do not ask any questions which can only be answered by the SVB team – such as the status of an order or product availability. You are also more than welcome to contact our SVB team by email at: or by phone on: +49 (0)421 57290510 .

  • More "Customers ask customers" available in the following languages :
  • Flag of Deutsch

Technical question

User image of Igor I.
Igor I. asked
on Jan 14, 2020
Flag of English HI! Is it the same type and dimensions like Whale switch? Thanks,
User image of Cory V.
Cory V. answered
on Oct 7, 2022
Dear customer, dimensions (HxWxD): 62 x 85 x 29 mm.