Does this work with Arduino?

Yes. Do not do what the user above instructed. This works as a digital switch not a powered switch. Run it from a standard digital pin to ground. digitalRead will come up with a 0 or a 1. Using it with 3.3v and analog input gives you goofy readings and makes the sensor heat-up something awful.

Will this work with the JBJ ato controller?

It should work fine. I am using it in a generic ato.

Can this be used with potable water ? Is it food grade?

Yes, it is completely sealed in plastic. I see no reason for it not to be safe for potable water. I am using it to monitor RO water levels in a storage tank I drink from.

Can you suggest a relay to use with these floats to run a 12v/5A water pump?

I use the twtade ssr-40 and it works great and has an attachment heatsink to prevent overheating. It can handle up to 60VDC @40a. I only have mine opening a 12VDC solenoid for my custom incubator but I'm sure it can handle a water pump. I use the same relay to control 4 heaters to keep it at temperature as well.

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💧 Stay ahead of the flow with Anndason’s smart float switch!

COMPACT SPACE SAVING - Slim 65 x 22mm body fits seamlessly into tight plumbing or aquarium setups.
MULTI PACK CONVENIENCE - Get 6 sensors in one package—perfect for multiple tanks or backup replacements to stay ahead.
VERSATILE INSTALLATION - Switch between normally open and normally closed modes by simply inverting the float—customize your setup effortlessly.
DURABLE LIGHTWEIGHT DESIGN - Crafted from robust polypropylene for long-lasting performance without adding bulk.
PRECISION LIQUID LEVEL CONTROL - Easily monitor and automate your tank’s water level with reliable float switch activation.

The Anndason DP5200 Float Switch is a compact, lightweight liquid level sensor designed for precise water level detection in tanks. Featuring a durable polypropylene build, a 39cm cable, and a max contact rating of 10W, it supports operation in temperatures from -10°C to 85°C. Its simple installation and reversible float design allow easy switching between normally open and closed modes. Sold in a convenient 6-pack, it’s ideal for professional or hobbyist use requiring reliable water level control.

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Manufacturer	Anndason
Brand	Anndason
Package Dimensions	13.41 x 9.5 x 3.61 cm; 70.87 g
Item model number	43237-2
Manufacturer part number	43237-2
Item Weight	70.8 g

Anndason 6 Pieces Plastic PP Float Switch Fish Tank Liquid Water Level Sensor,Model: DP5200

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