This is just like our regular double switch controller but instead has an optical water sensor for the primary level sensor and uses a madison float switch as the fail safe. The solid-state optical level sensor has no moving parts. This includes a low voltage upgrade with a low energy consumption relay as the optical sensor requires 12VDC for operation and can handle 40mA max. This controller will power devices up to 6A or 720 watts. Due to the high cost of the optical sensors we do not stock them and orders will take about a week to ship. You can also get this without the float switch backup for $10 less if you prefer.

Optical Sensor Controller w/ Float switch Backup: $143.00     Mount Style: Sump Mount 1 inch Gap Sump Mount 1.5 inch Gap Sump Mount (bend your own) Tank Mount 1 inch Gap Tank Mount 1.5 inch Gap Tank Mount (bend your own)

This design uses low voltage to power the relay. The advantage is the increased safety due to the reduced voltage which runs through the float switch(es). A 12V DC transformer is used to power the relay to switch 120 VAC power to run your pump or solenoid. The 12V power supply cable is 5 feet long.

This upgrade can be added to any topoff controller.

This upgrade option extends the float switch wires up to 10 feet (to approx 12 feet in length) on one or two float switches. Connections are soldered and heat-shrinked. Connections are not water proof so you cannot submerge.

If you would only like only one float switch extended on a double switch controller or if you would like less then 10 feet added please let us know via  email. If you order this option with multiple topoff controllers or with an upgrade option that adds a third float siwtch please let us know which switch or switches to extend (top, middle, bottom). If you would like all three float switch wires extended please add two wire extensions and let us know which two switches you would like to share the same extension and which switch will have it's own extension.

This upgrade will make the topoff controller fill from the bottom float switch to the top float switch. It will apply power when water level falls below the bottom switch and stay powered until the top switch goes high. This mode of operation is better for RO membranes as it the RO system will run for a longer period of time. Be aware that you lose the second switch backup protection with this option.

This upgrade can be added to double switch topoff controllers.

This option adds the latching functionality plus an extra float switch for backup purposes. The two lower switches come with the PVC surround, the backup switch is open like the upper switch on our double switch sump mount controller. This includes an extra mount of your choice to help with mounting the three switches.

This upgrade can be added to double switch topoff controllers.

This upgrade is the opposite of our 'latching upgrade'. It will make the topoff controller empty your tank from the top float switch to the bottom float switch. So when your water level raises and triggers the upper float switch the controller will turn on. It will stay on until the lower switch goes low. This is often used for water change systems.

This upgrade can be added to double switch topoff controllers.

This option adds a third float switch which prevents the pump from running dry. The bottom switch is submerged in your topoff reservoir and if the water falls below it, the controller will turn off your topoff pump. The middle switch controlls the water level in your sump. The top switch is the failsafe and will shut down the controller if it goes high. This includes an extra mount of your choice to help with mounting the three switches. Keep in mind the float switches are each ~2ft long so you may need to extend them if your sump and reservoir are a ways apart.

This is a triple float switch controller that has the third float switch reversed (magnets down) so it needs to be in the high position (normally submerged) in order to power the topoff controller. This gives you two backup switches, one above water and one below water. You could reverse the float back to normal so you have two above water backup switches so if either of the backups goes to the high position it will turn off the topoff pump.

This upgrade can be added to double switch topoff controllers.

This upgrade adds a switch that must be pressed to 'reset' the controller after your water level activates it. This is commonly used so when your tank, sump or overflow overflows the switch will trigger the controller to shut off your return pump or similar and will not restore power after the water level falls until the reset switch is pressed. This prevents a the controller from cycling on and off continually in the event your overflow is partially clogged and can't keep up with your return pump or similar.

This controller is similar to our topoff controllers but uses a GRI water sensor instead of a madison float switch. Upon sensing water the controller will either turn off or turn on power. You can also add additional water sensors for +20$ each. This includes a 12V upgrade as the GRI sensors require 12VDC for operation. The sensor leads are 6 feet.

GRI Water Sensors are triggered by a moisture bridge across the sensor contacts. The GRI Water Sensors can detect a layer of water as minute as 1/16 of an inch in depth.

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Power OFF when Water detected Power ON when Water detected Water Sensor Controller  $60.00

This controller switches power between your household power and a battery backup when you have a power outage. It has two power inputs and one power output. Plug one input into the wall and the other into a battery power supply. This can either power a device from the grid and switch to battery when the power goes out, or only power the device during an outage.

Will handle devices up to 15A or 1800 watts.

You will need an SLA (Sealed Lead Acid) or car battery and a power inverter. A decent size battery and inverter costs approx 50$. You can also incorporate a carger in your system so your battery always has a full charge. www.zbattery.com has batteries, inverters and chargers.

Use our float switch mounting brackets to hang any type of device to your tank, sump, etc. Includes necessary zipties. Refer to our products page for more information and pictures of our mounting brackets.