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 controller will power devices up to 6A or 720 watts max and includes a low voltage relay and power supply like in our low voltage option below. Due to the high cost of the optical sensors we do not stock them and orders will take about a week to ship.

We can also build nano brackets to hold both float switches if you prefer at no additional charge. You can get this without the float switch backup for $10 less.

Optical Sensor Controller w/ Float switch Backup: $140     Mount Style: 1 inch bracket (pictured) 1.5 inch bracket Bend your own bracket

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.

NOTE: No mounting bracket included - you will need to purchase a mounting bracket separately from our misc page.

Double switch controller, low voltage, no bracket: $49     Double switch tank controller, low voltage, no brackets, includes 2 snail guards: $52     Single switch controller, low voltage, no bracket: $38

This topoff controller minimizes the space required for mounting the float switch so even if you have a small aquarium, you can still enjoy not having to manually topoff your tank. Requires a 1.5"x1.5" footprint. Water level is adjustable from 1.5" to 7" below the top of your tank. You can choose between a single or double float switch.

Autotopoff Nano - Single Switch: $45     Mount Style: 0.25 inch bracket 0.5 inch bracket 1 inch bracket 1.5 inch bracket (pictured) Bend your own bracket Autotopoff Nano - Double switch: $60     Mount Style: 0.25 inch brackets 0.5 inch brackets 1 inch brackets 1.5 inch brackets Bend your own brackets

This option extends the float switch wires on one float switch an additional 5 feet and encases the wires in waterproof tubing so you can submerge the switch more then 15". This option is per float switch so if you are ordering a conotroller with more then one float switch please  email us and let us know which you would like to extend.

Waterproof Float Switch Wire Extension - 5ft total - 5' waterproof: $25     Waterproof Float Switch Wire Extension - 10ft total - 5' waterproof: $30

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.

You can also reverse the latching functionality by removing both floats and reversing them so the magnets inside the float are at the bottom. This 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 the latching functionality plus an extra float switch which acts as a fail-safe. The two lower switches come with the PVC surround, the fail-safe switch is open like the upper switch on our double switch sump mount controller. You will probably want to purchase an additional mounting bracket to assist with mounting the third float switch (available on our misc page).

This upgrade can be added to double switch topoff controllers.

This option adds a third float switch with the pvc surround like the lower switch pictured on our misc page which prevents the topoff 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.

You will probably want to purchase an additional mounting bracket to assist with mounting the third float switch (available on our misc page).

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 +15$ each by using the misc payment item below. Includes a low voltage relay and power supply as the GRI sensors run on 12VDC. The GRI 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 which makes them great for use as a fail-safe. Our GRI controller does not include a mounting bracket.

We have found that the GRI sensors don't hold up very well to being repeadily submerged in seawater. These work great as a fail-safe such as detecting when water overflows onto your floor.

Power ON when Water detected Power OFF when Water detected Water Sensor Controller  $40

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.

If you need more then just a custom bend please email us with your specifications for a quote.