I want a switch to protect a pump from running empty. Do I want a switch that the contact closes on the rise so once the float raises the pump works

The best thing is to get a switch with a normally closed contact that feeds the starter. This way when the tank gets low, the float activates ( contact opens) and turns off the pump.

Tittle reads closes on rise while the manufacturer's description reads that it open on rise...So what does it do?

Typically, there is a float with a 3/16" rod, that extends through the hole in the trip arm that sticks out from the switch. This rod has collars with set screws, set at the high and low levels. As the liquid level rises, the collar on the rod pushes the trip arm upwards, which closes the switch and starts a pump. When the pump has.pumped enough liquid that the second collar on the rod, comes down and trips the arm down, which opens the switch and stops the pump.

So where does the rod go? Is that there but not pictured?

The rod is not pictured. The rod goes thru the hole in the lever sticking out the front. You also should have two stoppers, one goes on the rod above the lever and one on the rod below the lever. These will turn the pump on when the water gets too high and off when it is low enough.

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Schneider Electric Square D by Schneider Electric 9036DG2 Commercial Open Tank Float Switch, Nema 1, Contacts Close On Rise, 3-1/2", Black

Product ID: 21862795

Details

Operation Mode
Hydraulic
Operating Voltage
575 Volts
Contact Type
Normally Open
Connector Type
Screw
Brand
Square D
Terminal
Screw

⚡Reliable pump activation

💧Fluid level detection precision

🔧Versatile installation options

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VT28653

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Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💡 Elevate your fluid management game with Schneider Electric’s precision switch!

DURABLE NEMA 1 ENCLOSURE - Protects internal components from dust and light exposure, ensuring longevity in commercial settings.
MULTI FLUID COMPATIBILITY - Engineered to handle water, hydraulic oils, and corrosive fluids without compromise.
ROBUST INSTALLATION READY - Equipped with 4 screw terminals and 3 conduit knockouts for flexible, secure wiring.
FAIL SAFE CONTACT MECHANISM - Contacts close on liquid rise, guaranteeing immediate and reliable response every time.
PRECISION FLUID LEVEL CONTROL - Automatically triggers pumps or alerts at exact liquid thresholds for seamless operations.

The Schneider Electric commercial open tank float switch offers precise fluid level detection and pump activation across various liquids, including corrosive fluids. Featuring a durable NEMA 1 enclosure and versatile wiring options, it ensures reliable, long-lasting performance in demanding commercial environments.

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