Dry-Level Switches | McMaster-Carr

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NEC Class I Divisions 1, 2 Groups C, D

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7 Products

Paddle Level Switches for Dry Materials


Horizontal Mount	Vertical Mount

Monitor the level of dry material in surge bins, tanks, and silos to avoid overspills and outages. With a long paddle, these switches extend farther into large storage containers to detect material levels where other types of switches can’t reach. You can even adjust the paddle's sensitivity to materials of different sizes and shapes, such as powders, plastic pellets, and wood chips. Install multiple switches on the same container to monitor levels at various points. They are rated NEMA 4X and IP66 for protection from corrosion and washdowns.

Horizontal Mount—Commonly installed near the bottom of containers to indicate low levels as material flows out. These switches start to rotate when material falls low enough to uncover the paddle, triggering a conveyor, pump, or other piece of equipment to prevent the container from emptying.

Vertical Mount—Mount to the roof of containers to indicate high levels when loading material. For domed roofs, you can extend these switches farther down by connecting the paddle to your desired length of _1/8 NPT Schedule 40 pipe. The paddle rotates freely until material rises to its level and stops it, triggering a conveyor, pump, or other piece of equipment to prevent overfilling.

With Alarm—Switches with an alarm alert you to potential malfunctions before they occur. They continuously perform self-diagnostics to detect everything from motor failure to seized bearings. When they detect an error, an LED light flashes in a corresponding code, so maintenance workers will immediately know which problem they need to fix.

				Paddle				Switch
	Insertion Dp.	Material Wt. Cap. Range, lb/ft³	Max. Pressure @ Temp.	Speed, rpm	Lg.	Wd.	Material	Starting Position	Designation	Current @ Voltage	Enclosure Rating	Hazardous Location Rating	Certification		Each
Horizontal Mount







				Without Alarm

				6 5/8"	0 to 30	30 psi @ 70° F	1	7"	2"	316 Stainless Steel	1 Off or 1 On	SPDT	20 amp @ 120V AC	IP66 NEMA 4X	NEC Class I Divisions 1, 2 Groups C, D NEC Class II Divisions 1, 2 Groups E, F, G	UL Listed C-UL Listed	49005K51	0000000




						With Alarm

						6 5/8"	0 to 30	30 psi @ 70° F	1	7"	2"	316 Stainless Steel	1 Off or 1 On	SPDT	8 amp @ 120V AC	IP66 NEMA 4X	NEC Class I Divisions 1, 2 Groups C, D NEC Class II Divisions 1, 2 Groups E, F, G	UL Listed C-UL Listed	49005K26	000000


						Vertical Mount







										Without Alarm

										12"	30 to 70	30 psi @ 70° F	1	5"	1 1/2"	316 Stainless Steel	1 Off or 1 On	SPDT	20 amp @ 120V AC	IP66 NEMA 4X	NEC Class I Divisions 1, 2 Groups C, D NEC Class II Divisions 1, 2 Groups E, F, G	UL Listed C-UL Listed	49005K52	000000




												With Alarm

												12"	30 to 70	30 psi @ 70° F	1	5"	1 1/2"	316 Stainless Steel	1 Off or 1 On	SPDT	8 amp @ 120V AC	IP66 NEMA 4X	NEC Class I Divisions 1, 2 Groups C, D NEC Class II Divisions 1, 2 Groups E, F, G	UL Listed C-UL Listed	49005K36	000000

Replacements for Paddle Level Switches

Paddle Material		Each
316 Stainless Steel	49005K72	000000

Voltage, V AC	Includes		Each
120	Bracket, Washer	49005K71	0000000

Capacitive Noncontact Level Sensor Switches for Chemicals

This switch mounts to the outside of your tank and detects chemical level through plastic tank walls by measuring the capacitance between the switch and tank contents; it cannot be used with metal tanks. Mount switch horizontally or vertically with the included mounting bracket.

	Switch Starting Position	Switch Designation	Current @ Voltage	Dia.	Lg.	Electrical Connection	Includes	Certification		Each
20V AC to 240V AC Input Voltage



	-10 to 175	1 Off, 1 On	SPST-NC SPST-NO	0.25 amp @ 240V AC	1 3/16"	3"	Wire Leads	Mounting Bracket	UL Listed, CSA Certified	4696K31	0000000