Float switch
Optimum water utilisation and pump protection
Float switches are components for domestic and industrial water systems. These devices control pumps, solenoid valves, alarm devices and control systems depending on the fill level in containers, tanks or cisterns. For example, they ensure that water is replenished as required or protect the pump from running dry. Find out more about the functions and installation of our devices here.
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The function
A float switch ensures precise control of the water level in your water system. It protects your pump from running dry or prevents your cistern or water tank from running empty. This is important in rainwater utilisation systems, for example, in order to make optimum use of the collected rainwater.
In general, these switches are ideal for use in waste water, service water and tap water systems. Float switches are equally suitable for submersible pumps or freely installed suction pumps. They are designed for continuous use under water.
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Our products
Product information
Float switch for water make-up
The yellow float switch is suitable for controlling a mains water make-up system. For attachment to the inlet pipe in the cistern or to the underwater pump. The switch lever defines the switch-on and switch-off point so that the water level rises by 9 cm (daily requirement of a detached house).
- Economical top-up
- Only 9 cm switching clearance
- Quick and safe installation on the submersible pump
Product information
Float switch for dry-running protection
The red float switch is used to switch off the pump if the water level in the water storage tank or cistern is insufficient. For attachment to the inlet pipe of the cistern or to the submersible pump. When the storage tank is sufficiently full again and the minimum fill level is reached, e.g. after a rain event, the pump is reactivated for operation by the float switch.
- Only 9 cm gearshift play
- Quick and safe installation on the submersible pump
Application in rainwater utilisation
The float switch offers two main functions here:
The replenishment of mains water and dry-running protection.
Water replenishment
An important area of application is the replenishment of tap water. The float switch switches over when the water level falls below a defined minimum level and activates a solenoid valve that feeds tap water into the cistern or an intermediate tank. This guarantees that there is a supply of water in the cistern at all times and prevents failures due to a lack of water. The top-up system ensures that there is always sufficient water available in the cistern, even if it has only rained a little.
The yellow float switch from WISY is perfect for controlling a solenoid valve or the WISY drinking water make-up system. It is very easy to attach, either to the inlet pipe or to the underwater pump. The switch lever is used to define the switch-on and switch-off point so that the water level rises by 9 cm - this corresponds to the daily requirement of a detached house.
The float switch consists of a mirror-welded polypropylene float housing, a stainless steel switch lever and a mounting clamp, optionally suitable for various pipe diameters. Equipped with a flexible connection cable (3 x 1 mm²) in 3m, 10m or 20m length. It is easiest to control the make-up water solenoid valve using an adapter plug. The float switch then switches the socket of the intermediate plug on or off. The connecting cable for the make-up solenoid valve is plugged into this socket.
Dry-running protection
Dry-running protection switches the pump off if the water level is too low. This prevents damage to the pump due to running dry and significantly extends its service life. When the storage tank reaches its minimum fill level during the next rain event in rainwater utilisation applications, the pump is enabled for operation again by the float switch. The float switches are suitable for both submersible pumps and suction pumps.
Our red float switches are designed to switch off the pump if the water level is insufficient. They are most easily attached to the inlet pipe or the submersible pump. The float switch consists of a mirror-welded polypropylene float housing and a stainless steel switch lever as well as a mounting clamp for various pipe diameters. Equipped with a flexible connection cable (3 x 1 mm²) in 3m, 10m or 20m length.
Overview of the functions
Level control
Regulates the fill level in tanks and cisterns.
Dry-running protection
Protects the pump from damage due to dry running.
Automatic replenishment
Ensures a constant water level in the tank.
Wide range of applications
Suitable for industrial water, waste water and drinking water systems.
Simple installation
Installing the WISY float switches is simple and straightforward. The switches can be mounted directly on the inlet pipe or on the submersible pump. High-quality stainless steel clamps ensure a durable and reliable fastening. Float switches can be installed with or without a swivel joint to adapt the switching cycle to different water levels. For detailed instructions on how to connect the float switches, you can find more information in our download area.
Maintenance and care
WISY float switches are easy to care for and require only minimal maintenance. An occasional check and cleaning promotes reliable operation. In particular, the float must be able to move freely, cables and hoses should be firmly attached and run outside the float's radius of movement. Float switches for waste water systems must be checked a little more frequently to ensure that they continue to function correctly.
Expert conclusion
Float switches are ideal for the safe operation and efficient utilisation of water systems. They can be used for a wide range of applications, from preventing dry running, signalling when the tank is empty or overflowing, pumping water around and automatic replenishment. WISY offers high-quality and durable products for professional use that can be installed in any water system. This investment pays for itself quickly by preventing pump damage and ensuring a continuous water supply. The switches can be used universally for submersible pumps and freely installed pumps, for waste water or pre-filtered water.
