Harwil’s flow switches have been used by almost every pool or spa component manufacturers in the industry. The legendary Q-12 flow switch can be used in ¾ to 2 inch pipe and is capable of detecting even the lowest flow rates. The Q-12 flow switch is used in almost every salt chlorinator to ensure sufficient flow before the plates are energized. It can even include a temperature sensor to make sure everything is just right. Harwil flow switches are used in spas to keep the heater from running in unsafe conditions and protecting the users. The Harwil Q-8 flow switch is used to control UV and OZONE systems, turning them on when conditions are right. The CF-12 and CF-8 are used to control chemical feed pumps for residential and commercial pools. Harwil has been making the switches for over 30 years.
The CF-8 is ideal for where higher flow rates are need such as commercial swimming pool chlorine injection or to control UV or Ozone Systems.
The CF-12 is ideal for where low flow rates are need such as residential swimming pool chlorine injection or to control UV or Ozone Systems.
This robust and accurate flow switch has been the heart of just about every salt chlorinator and in spas to protect the water heater.
The Q-12 is combined with temperature sensors (QT-12) to provide two functions from a single device which is ideal for salt chlorinators.
The Q-8 flow switch is idea for pool heaters that are above or below grade. The Q-8 can also guarantee that there is sufficient flow.
The Q-16 is designed to replace problem paddle style flow switches. The seals and paddles are much more robust than the competitors. All paddles included.
This level switch can have a 5 inch differential eliminating rapid pump cycling, perfect for RO atmospheric tanks. It is also ideal for turbid water.
This level switch is the most versatile switch made. It be used in a wide range of liquids including heavily chlorinated water. Available N/O and...