NEC Class I Divisions1, 2 Groups B, C, D Switches

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Choosing an Electrical Switch

About Pressure Switches

About Float Switches

Safe to use near ignitable gases and dust, the housing on these switches seals in anything that could ignite flammable material. All are UL listed and CSA certified for use in hazardous locations. Yank the cable anywhere along your line to quickly cut power in emergencies. They have positive-force, snap-open contacts that open a circuit when actuated, even if a spring fails or the contacts stick. The contacts will remain open until you tension the cable and reset the switch. Use the tension indicator to visually confirm that they’re reset correctly.

For technical drawings and 3-D models, click on a part number.

									Mounting
For Max. Cable Lg., ft.	No. of Circuits Controlled	Switch Starting Position	No. of Terminals	Industry Designation	Switching Current @ Voltage	Max. Voltage	Actuation Force, lbs.	Conduit Trade Size	Fasteners Included	Hole Dia. (No. of Holes)	Hole Thread Size (No. of Holes)	Features		Each
With Screw Terminals
1 Direction (NEMA 4; NEMA 7; NEMA 9; NEMA 13; NEC Class I Divisions 1, 2 Groups B, C, D; NEC Class II Divisions 1, 2 Groups E, F, G)
200	1	1 Off (Normally Open) or 1 On (Normally Closed)	3	SPDT	10 A @ 600 V AC, 10 A @ 250 V DC	250V DC/600V AC	25	1/2	No	1/4" (2)	5/16"-18 (2)	Tension Indicator	0000000	000000000
200	2	2 On (Normally Closed)	4	DPST-NC	10 A @ 600 V AC, 10 A @ 250 V DC	250V DC/600V AC	25	1/2	No	1/4" (2)	5/16"-18 (2)	Tension Indicator	0000000	00000000

Hazardous Location Limit Switches

Plunger

Wobble Stick

Safely open or close a circuit near ignitable gases and dust—the housing on these switches seals in anything that could ignite flammable material. You'll know they're safe because they're NEC Class I, Division 1, Groups B, C, and D; and Class II, Division 1, Groups E, F, and G certified for hazardous locations. These switches send a signal to your circuit when an object hits the actuator—for instance, a box on a conveyor runs into the switch, stopping the conveyor. They open and close circuits as fast as snap-acting switches, but they have a bigger actuator for large objects.

Switches with a plunger actuator let you adjust the actuator’s height to easily align it with your target. They require a push to activate, similar to a button.

Switches with a wobble stick actuator have an arm that rotates 360°, so you don’t need to align it in a specific direction. The actuator won’t snap if pushed backward, such as if there’s a jam in your system.

For technical drawings and 3-D models, click on a part number.

										Housing
No. of Circuits Controlled	Switch Starting Position	Switch Action	Industry Designation	Switching Current @ Voltage	Max. Voltage	Operating Temp. Range, °F	Actuator Ht.	Wire Connection Type	No. of Terminals	Lg.	Ht.	Dp.	Housing Material	Conduit Trade Size		Each
Plunger Actuator Style
1	1 Off (Normally Open) or 1 On (Normally Closed)	Springs Back (Momentary)	SPDT	10 A @ 600 V AC, 2.5 A @ 600 V DC	600V AC 600V DC	0° to 185°	2.7"-2.9"	Screw Terminals	4	2.7"	4.1"	2.1"	Aluminum	1/2	0000000	0000000
Wobble Stick Actuator Style
1	1 Off (Normally Open) or 1 On (Normally Closed)	Springs Back (Momentary)	SPDT	10 A @ 600 V AC, 2.5 A @ 600 V DC	600V AC 600V DC	0° to 185°	6.2"	Screw Terminals	4	2.7"	4.1"	2.1"	Aluminum	1/2	0000000	000000

Hazardous Location Enclosed Disconnect Switches

With a housing that’s designed to contain an explosion, these switches are safe to use in areas where ignitable concentrations of flammable or combustible gas, dust, or fibers may be present. They meet NEC Class I Div. 1 and 2, Groups B, C, D, and Class II, Div. 1 and 2, Groups E, F, and G. Use them to cut power and keep it isolated, so equipment won’t accidentally start up during inspection or maintenance.

Made from aluminum, these switches also resist corrosion in wet or oily areas. They have a lockout, so you can secure them in the off position with a padlock (not included).

For technical drawings and 3-D models, click on a part number.

	Switching
	Current, A	Voltage	Switch Action	Industry Designation	Electrical Phase (hp)	Ht.	Wd.	Environmental Rating		Each
Powder-Coated Aluminum Housing with Red Actuator
3 Circuits with Lockout
A	30	600V AC	Stays Switched (Maintained)	3PST	Three (30 hp @ 600 V AC)	8 1/16"	5 3/4"	NEC Class I Divisions 1, 2 Groups B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Zone 1 Groups IIB, IIA NEMA 4X NEMA 7 NEMA 9	0000000	000000000
Powder-Coated Aluminum Housing with Yellow Actuator
3 Circuits with Lockout
B	60	600V AC	Stays Switched (Maintained)	3PST	Three (40 hp @ 600 V AC)	13 1/16"	8 1/8"	NEC Class I Divisions 1, 2 Groups B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Zone 1 Groups IIB, IIA NEMA 4X NEMA 7 NEMA 9	0000000	00000000
B	100	600V AC	Stays Switched (Maintained)	3PST	Three (50 hp @ 600 V AC)	13 1/16"	8 1/8"	NEC Class I Divisions 1, 2 Groups B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Zone 1 Groups IIB, IIA NEMA 4X NEMA 7 NEMA 9	0000000	00000000

Hazardous Location Threaded Temperature Switches

Often used in hazardous locations, such as chemical plants, refineries, and grain elevators, these switches have a housing that’s UL listed for environments with flammable gases, combustible dust, and ignitable fibers. It is UL listed for use in Class I, Divisions 1 and 2, Groups B, C, and D; Class II, Divisions 1 and 2, Groups E, F, and G; and Class III, Divisions 1 and 2 hazardous locations. The housing also meets NEMA 4X for use in washdown environments with splashing water, corrosive liquid, and dust. Install the threaded probe directly into tanks, pipelines, and other process components to turn heating equipment on or off at a specified temperature. Set actuation points with the adjustment dial.

Switch with one actuation point has one SPDT (single pole, double throw) relay. The relay can be set to turn one circuit from off to on (normally open) or from on to off (normally closed).

Switch with two actuation points has two SPDT (single pole, double throw) relays. Each relay can be set to turn one circuit from off to on (normally open) or from on to off (normally closed).

						Probe
Temp. Range, °F	No. of Actuation Points	Actuation Tolerance	No. of Circuits Controlled	Electrical Phase	Max. Switching Current @ Voltage	Dia.	Lg.	Material	Ht.	Wd.	Dp.	Environmental Rating		Each
Threaded Brass Probe—1/2 NPT Male
0° to 225°	1	±1%	1	Single	15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC	9/16"	1 7/8"	Brass	10"	5 1/8"	5 3/16"	NEC Class I Divisions 1, 2 Groups B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2 NEC Zone 1 Groups IIB, IIA IEC Zone 1 Groups IIC, IIB, IIA IEC Zone 21 Groups IIIC, IIIB, IIIA IP66 NEMA 4X NEMA 7 NEMA 9	0000000	0000000
0° to 225°	2	±1%	2	Single	15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC	9/16"	1 7/8"	Brass	10"	5 1/8"	5 3/16"	NEC Class I Divisions 1, 2 Groups B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2 NEC Zone 1 Groups IIB, IIA IEC Zone 1 Groups IIC, IIB, IIA IEC Zone 21 Groups IIIC, IIIB, IIIA IP66 NEMA 4X NEMA 7 NEMA 9	0000000	00000000

Hazardous Location Wall-Mount Temperature Switches

With Threaded Probe

With Unthreaded Probe

Turn heating equipment on or off in environments with flammable gases, combustible dust, and ignitable fibers, such as chemical plants, refineries, and grain elevators. The switch housing is UL listed for use in Class I, Divisions 1 and 2, Groups B, C, and D; Class II, Divisions 1 and 2, Groups E, F, and G; and Class III, Divisions 1 and 2 hazardous locations. It also meets NEMA 4X for use in washdown environments with splashing water, corrosive liquid, and dust. Switches have a probe on a cable for remote temperature readings. Set actuation points with the adjustment dial.

Switch with one actuation point has one SPDT (single pole, double throw) relay. The relay can be set to turn one circuit from off to on (normally open) or from on to off (normally closed). The probe has 1/2 NPT male threads for installation directly into tanks, pipelines, and other process components. It comes with a bushing that adapts the thread size to 3/4 NPT male.

Switch with two actuation points has two SPDT (single pole, double throw) relays. Each relay can be set to turn one circuit from off to on (normally open) or from on to off (normally closed).

					Probe
Temp. Range, °F	Temp. Accuracy, °F	No. of Actuation Points	Electrical Phase	Max. Switching Current	Dia.	Lg.	Ht.	Wd.	Dp.	Environmental Rating	Includes		Each
SPDT—1 Circuit Controlled
Threaded Stainless Steel Probe—1/2 NPT Male
30° to 250°	±5°	1	Single	15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC	3/8"	2 5/8"	9 5/16"	5 1/8"	5 3/16"	NEC Class I Divisions 1, 2 Groups B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2 NEC Zone 1 Groups IIB, IIA IEC Zone 1 Groups IIC, IIB, IIA IEC Zone 21 Groups IIIC, IIIB, IIIA IP66 NEMA 4X NEMA 7 NEMA 9	1/2 × 3/4 NPT Adapter Bushing	0000000	000000000
SPDT—2 Circuit Controlled
Unthreaded Stainless Steel Probe
30° to 250°	±5°	2	Single	15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC	3/8"	2 5/8"	9 5/16"	5 1/8"	5 3/16"	NEC Class I Divisions 1, 2 Groups B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2 NEC Zone 1 Groups IIB, IIA IEC Zone 1 Groups IIC, IIB, IIA IEC Zone 21 Groups IIIC, IIIB, IIIA IP66 NEMA 4X NEMA 7 NEMA 9	__	0000000	00000000

Packing Seals and Fittings

0000000

Each

000000

Hazardous Location Differential Pressure Switches for Liquids

Tested and verified by UL and C-UL for use where explosive dust or gas are present, these switches have an explosion-proof enclosure that meets NEMA 7 and 9 standards for hazardous locations. They are often used to indicate a filter is clogged in a pump or cooling system. When the differential pressure reaches your setpoint, these switches can turn equipment on and off, activate automated controls, or signal alarms. They are single pole, double throw (SPDT) and can be installed to turn one circuit from off to on (normally open) or from on to off (normally closed).

In addition to being UL and C-UL listed, these switches are CE marked, so they also meet European safety standards. All switches are IP and NEMA rated for use outdoors and to protect against some corrosion, dust, and washdowns.

For technical drawings and 3-D models, click on a part number.

Screw Terminals
Setpoint Range	Approximate Difference Between Setpoint and Reset Point	Max. Input Pressure, psi	Accuracy	Max. Switching Current	Process Temp. Range, °F	Connection Material	For Use With	Environmental Rating		Each
1/4 NPT Female Pipe Connection
5-80 in. of H2O	2.5 in. of H2O	225	±0.5%	15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC 1 A @ 48 V DC 2 A @ 30 V DC 500 mA @ 125 V DC	-10° to 200°	Aluminum	Diesel Fuel, Gasoline, Hydraulic Oil (Petroleum Based), Water	IP66; NEC Class I Divisions 1, 2 Groups B, C, D; NEC Class II Divisions 1, 2 Groups E, F, G; NEMA 4X; NEMA 7; NEMA 9	0000000	0000000
2-20 psi	0.2 psi	225	±0.5%	15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC 1 A @ 48 V DC 2 A @ 30 V DC 500 mA @ 125 V DC	-10° to 200°	Aluminum	Diesel Fuel, Gasoline, Hydraulic Oil (Petroleum Based), Water	IP66; NEC Class I Divisions 1, 2 Groups B, C, D; NEC Class II Divisions 1, 2 Groups E, F, G; NEMA 4X; NEMA 7; NEMA 9	0000000	000000
3-30 psi	0.25 psi	225	±0.5%	15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC 1 A @ 48 V DC 2 A @ 30 V DC 500 mA @ 125 V DC	-10° to 200°	Aluminum	Diesel Fuel, Gasoline, Hydraulic Oil (Petroleum Based), Water	IP66; NEC Class I Divisions 1, 2 Groups B, C, D; NEC Class II Divisions 1, 2 Groups E, F, G; NEMA 4X; NEMA 7; NEMA 9	0000000	000000
10-100 psi	0.6 psi	225	±0.5%	15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC 1 A @ 48 V DC 2 A @ 30 V DC 500 mA @ 125 V DC	-10° to 200°	Aluminum	Diesel Fuel, Gasoline, Hydraulic Oil (Petroleum Based), Water	IP66; NEC Class I Divisions 1, 2 Groups B, C, D; NEC Class II Divisions 1, 2 Groups E, F, G; NEMA 4X; NEMA 7; NEMA 9	0000000	000000

Horizontal-Mount Hazardous Location Float Switches for Fuels and Oils

Designed for use in areas where flammable substances are present, these switches are CSA certified for hazardous locations. Mount them through a tank wall. All are rated NEMA 4 for protection from washdowns. All are single pole, double throw (SPDT) and can be installed to turn one circuit from “off” to “on” (normally open) or from “on” to “off” (normally closed).

For technical drawings and 3-D models, click on a part number.

	Pipe									Conduit
Style	Size	Thread Type	Gender	Min. Specific Gravity	Max. Pressure	Temp. Range, °F	Insertion Dp.	Current	Float Material	Trade Size	Thread Type	Gender	Environmental Rating		Each
120V AC/240V AC Input Voltage
Brass Body
A	1	NPT	Male	0.7	350 psi @ 70° F	0° to 220°	1 3/4"	5 A @ 120 V AC	304 Stainless Steel	3/4	NPT	Male	NEC Class I Divisions 1, 2 Groups B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEMA 4	0000000	0000000
A	1	NPT	Male	0.9	1,000 psi @ 70° F	0° to 220°	1 3/4"	5 A @ 120 V AC	Polypropylene Plastic	3/4	NPT	Male	NEC Class I Divisions 1, 2 Groups B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEMA 4	0000000	000000
B	1	NPT	Male	0.5	200 psi @ 70° F	0° to 220°	2 7/8"	5 A @ 120 V AC	304 Stainless Steel	3/4	NPT	Male	NEC Class I Divisions 1, 2 Groups B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEMA 4	0000000	000000

Hazardous Location Flow Switches

UL listed for use where flammable gases or combustible dusts may be present, these flow switches activate or deactivate equipment when your flow rate reaches a set point. Use the adjustment screw to select their set point. They actuate when your flowing liquid or gas pushes their paddle into a certain position determined by the set point. All are single pole, double throw (SPDT) and can either turn one device from off to on (normally open) or on to off (normally closed). Mount them horizontally. Rated NEMA 4, they also protect against weather and washdowns.

These flow switches are calibrated with water and air. You can use them with other liquids and gases, but they may not measure accurately if the viscosity is different from water or air.

For technical drawings and 3-D models, click on a part number.

			Set Point						Conduit
Pipe Size	Thread Type	Gender	For Liquids, gpm	For Gases, scfm	Max. Pressure	Temp. Range, °F	Voltage	Max. Switching Current	Trade Size	Thread Type	Gender	End-to-End Lg.		Each
Brass Body
1/2	NPT	Female	0.04 to 0.75	0.18 to 2.7	1450 psi @ 70° F	-4° to 220°	120V AC/ 240V AC	5 A @ 120 V AC	3/4	NPT	Male	3 5/8"	00000000	0000000
304 Stainless Steel Body
1/2	NPT	Female	0.04 to 0.75	0.18 to 2.7	1450 psi @ 70° F	-4° to 220°	120V AC/ 240V AC	5 A @ 120 V AC	3/4	NPT	Male	3 5/8"	00000000	000000

Fixed-Setpoint Hazardous Location Flow Switches

Safe to use where flammable gases and combustible dust may be present, these switches activate or deactivate when your flow reaches a factory-set level. All are UL listed for hazardous environments. Because their set point is fixed, they’re ready to go, making them easy to install. They actuate when your flowing liquid or gas pushes their paddle into a set position. These switches are single pole, double throw (SPDT) and can turn one device from off to on (normally open) or from on to off (normally closed). They must be mounted horizontally to function accurately.

These switches are calibrated with water and air. They can also be used with other liquids and gases but may not measure accurately if their viscosity is significantly different.

For technical drawings and 3-D models, click on a part number.

			Set Point						Conduit
Pipe Size	Thread Type	Gender	For Liquids, gpm	For Gases, scfm	Max. Pressure	Temp. Range, °F	Voltage	Max. Switching Current	Trade Size	Thread Type	Gender	End-to-End Lg.		Each
Brass Body
1/2	NPT	Female	1.5	6.5	250 psi @ 70° F	-4° to 220°	120V AC/ 240V AC	5 A @ 120 V AC	3/4	NPT	Male	2 1/4"	00000000	0000000
3/4	NPT	Female	2	10	250 psi @ 70° F	-4° to 220°	120V AC/ 240V AC	5 A @ 120 V AC	3/4	NPT	Male	2 3/8"	00000000	000000
1	NPT	Female	3	14	250 psi @ 70° F	-4° to 220°	120V AC/ 240V AC	5 A @ 120 V AC	3/4	NPT	Male	2 1/2"	00000000	000000
1 1/4	NPT	Female	4	21	250 psi @ 70° F	-4° to 220°	120V AC/ 240V AC	5 A @ 120 V AC	3/4	NPT	Male	2 5/8"	00000000	000000
1 1/2	NPT	Female	6	33	250 psi @ 70° F	-4° to 220°	120V AC/ 240V AC	5 A @ 120 V AC	3/4	NPT	Male	2 7/8"	00000000	000000
2	NPT	Female	10	43	250 psi @ 70° F	-4° to 220°	120V AC/ 240V AC	5 A @ 120 V AC	3/4	NPT	Male	3"	00000000	000000
304 Stainless Steel Body
1/2	NPT	Female	1.5	6.5	2000 psi @ 70° F	-4° to 220°	120V AC/ 240V AC	5 A @ 120 V AC	3/4	NPT	Male	2 1/4"	00000000	000000
3/4	NPT	Female	2	10	2000 psi @ 70° F	-4° to 220°	120V AC/ 240V AC	5 A @ 120 V AC	3/4	NPT	Male	2 5/8"	00000000	000000
1	NPT	Female	3	14	2000 psi @ 70° F	-4° to 220°	120V AC/ 240V AC	5 A @ 120 V AC	3/4	NPT	Male	3"	00000000	000000
2	NPT	Female	10	43	2000 psi @ 70° F	-4° to 220°	120V AC/ 240V AC	5 A @ 120 V AC	3/4	NPT	Male	4 3/4"	00000000	00000000

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Choosing an Electrical Switch

About Pressure Switches

About Float Switches

Hazardous Location Cable-Pull Emergency Stop Switches

Hazardous Location Limit Switches

Hazardous Location Enclosed Disconnect Switches

Hazardous Location Threaded Temperature Switches

Hazardous Location Wall-Mount Temperature Switches

Hazardous Location Differential Pressure Switches for Liquids

Horizontal-Mount Hazardous Location Float Switches for Fuels and Oils

Hazardous Location Flow Switches

Fixed-Setpoint Hazardous Location Flow Switches