Choosing an Electrical Switch
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About Hazardous Location Environmental Ratings
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Choosing an Air Directional Control Valve
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Matching Flow Diagrams to Replace an Air Directional Control Valve
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About Pressure Switches
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About Motor Switches and Starters
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Hazardous Location Enclosed Push-Button Switches
Use these switches where ignitable gas and dust may be present. They're rated for use in hazardous locations.
For technical drawings and 3-D models, click on a part number.
Mounting | |||||||||||||
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Message (Actuator Color) | No. of Circuits Controlled per Button | Switch Starting Position | Switch Action | No. of Terminals per Button | Industry Designation | Switching Current @ Voltage | Max. Voltage | Conduit Trade Size | Fasteners Included | No. of Holes | Hole Dia. | Each | |
With Screw Terminals | |||||||||||||
1 Flush Button | |||||||||||||
Start (Black) | 1 | 1 Off (Normally Open) and 1 On (Normally Closed) | Springs Back (Momentary) | 4 | DPST-1NO/1NC | 10 A @ 120 V AC | 600V AC | 3/4 | No | 2 | 5/16" | 0000000 | 0000000 |
1 Flush Button and 1 Projecting Button | |||||||||||||
Start (Green), Stop (Red) | 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | Springs Back (Momentary) | 2 | DPST-1NO/1NC | 10 A @ 120 V AC | 600V AC | 3/4 | No | 2 | 9/32" | 0000000 | 000000 |
Hazardous Location Foot Switches
These switches are rated for environments where hazardous material is present. Press the pedal with your foot for hands-free operation. They have an oversized guard that accommodates bulky footwear.
Hazardous location environmental ratings indicate whether manufacturers have included safety features in products to facilitate their safe use in a hazardous environment. Before selecting a product for a hazardous location, ensure it is rated for your environment. See About Hazardous Location Environmental Ratings.
Mounting | ||||||||||
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No. of Circuits Controlled | Switch Starting Position | Switch Action | Industry Designation | Switching Current @ Voltage | Fasteners Included | No. of Holes | Hole Dia. | Environmental Rating | Each | |
1 Speed with Screw Terminals | ||||||||||
Aluminum Housing with 1 Pedal, Oversized Guard, and Back Pivot | ||||||||||
1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 20 A @ 125 V AC/250 V AC | No | 6 | 0.28" | NEC Class I Divisions 1, 2 Group D NEC Class II Divisions 1, 2 Groups F, G NEC Zone 1 Group IIA IP41 NEMA 2 NEMA 7 NEMA 9 | 0000000 | 0000000 |
2 | 2 Off (Normally Open) or 2 On (Normally Closed) | Springs Back (Momentary) | DPDT | 20 A @ 125 V AC/250 V AC | No | 6 | 0.28" | NEC Class I Divisions 1, 2 Group D NEC Class II Divisions 1, 2 Groups F, G NEC Zone 1 Group IIA IP41 NEMA 2 NEMA 7 NEMA 9 | 0000000 | 000000 |
Aluminum Housing with 2 Pedals, Oversized Guard, and Back Pivot | ||||||||||
2 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 20 A @ 125 V AC/250 V AC | No | 6 | 0.28" | NEC Class I Divisions 1, 2 Group D NEC Class II Divisions 1, 2 Groups F, G NEC Zone 1 Group IIA IP41 NEMA 2 NEMA 7 NEMA 9 | 0000000 | 000000 |
Hazardous Location Limit Switches
Use these switches where ignitable gas and dust may be present. They meet NEC Class I, Division 1, Groups B, C, and D; and Class II, Division 1, Groups E, F, and G for hazardous locations. When an object in motion touches the actuator, it sends a signal to open or close a circuit. They’re often used on conveyor systems and elevators.
Switches with a plunger allow you to adjust its height, making it easier to align switch with the target during installation.
For technical drawings and 3-D models, click on a part number.
Housing | ||||||||||||||||
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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 Motor Switches
Use these switches where ignitable gas and dust may be present. They're rated Class I, Divisions 1 and 2, Groups C and D; and Class II, Divisions 1 and 2, Groups E, F, and G for hazardous locations. Use them to turn motors on and off, or with other circuits such as lighting and electric heat circuits. They do not provide overload protection.
For technical drawings and 3-D models, click on a part number.
Switching | ||||||||||||
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No. of Circuits Controlled | Electrical Phase (hp) | Switch Starting Position | Industry Designation | Current, A | Voltage | Ht. | Wd. | Wire Connection Type | Environmental Rating | Specifications Met | Each | |
Stays Switched (Maintained) | ||||||||||||
2 | Single (3 hp @ 240 V AC) | 2 Off (Normally Open) | DPST-NO | 30 | 600V AC | 6.5" | 3" | Screw Terminals | NEC Class I Divisions 1, 2 Groups C, D NEC Class II Divisions 1, 2 Groups E, F, G NEMA 7 NEMA 9 | UL Listed, C-UL Listed, CSA Certified | 0000000 | 0000000 |
3 | Three (7 1/2 hp @ 240 V AC) | 3 Off (Normally Open) | 3PST-NO | 30 | 600V AC | 6.5" | 3" | Screw Terminals | NEC Class I Divisions 1, 2 Groups C, D NEC Class II Divisions 1, 2 Groups E, F, G NEMA 7 NEMA 9 | UL Listed, C-UL Listed, CSA Certified | 0000000 | 000000 |
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 | ||||||||||||||
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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
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 | |||||||||||||
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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 Electrically Operated Air Directional Control Valves
These valves are rated for environments where hazardous material is present. Often used to extend and then retract a cylinder at different speeds, they create two actions and have two exhaust ports, which allows you to control the speed of each action by attaching a flow control valve to each exhaust port. They direct airflow from the inlet to your equipment and exhaust return airflow to create motion. Apply voltage to the electrical connection to actuate. Return actuation is by spring, so they go back to their original position when voltage is removed. Also known as 4-way valves.
5/3 (closed center) valves close all ports in the off position to stop equipment in a locked position with air pressure holding it in place.
Flow coefficient (Cv) is a measurement that indicates how much airflow can pass through a valve.
Hazardous location environmental ratings indicate whether manufacturers have included safety features in products to facilitate their safe use in a hazardous environment. Before selecting a product for a hazardous location, ensure it is rated for your environment.
Overall | |||||||||||||||
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No. of Flow Ports | Inlet Size | Outlet Size | Max. Flow Rate, scfm @ 100 psi | Flow Coefficient (Cv) | Pressure Range, psi | Vacuum Rating, in. of Hg | Environmental Rating | Voltage | Wire Connection Type | Lg. | Wd. | Ht. | Mounting Fasteners Included | Each | |
5/2 Flow Pattern | |||||||||||||||
Single Solenoid | |||||||||||||||
5 | 1/4 NPT | 1/4 NPT | 65.34 | 1.7 | 14-145 | 28 | NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEMA 3S NEMA 6P NEMA 7 NEMA 9 | 24V DC | Wire Leads | 6" | 1" | 2 7/8" | No | 0000000 | 0000000 |
5 | 1/4 NPT | 1/4 NPT | 65.34 | 1.7 | 14-145 | 28 | NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEMA 3S NEMA 6P NEMA 7 NEMA 9 | 120V AC | Wire Leads | 6" | 1" | 2 7/8" | No | 0000000 | 000000 |
5/3 (Closed Center) Flow Pattern | |||||||||||||||
Double Solenoid | |||||||||||||||
5 | 1/4 NPT | 1/4 NPT | 65.34 | 1.7 | 14-145 | 28 | NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEMA 3S NEMA 6P NEMA 7 NEMA 9 | 24V DC | Wire Leads | 9 3/8" | 1" | 2 7/8" | No | 0000000 | 000000 |
5 | 1/4 NPT | 1/4 NPT | 65.34 | 1.7 | 14-145 | 28 | NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEMA 3S NEMA 6P NEMA 7 NEMA 9 | 120V AC | Wire Leads | 9 3/8" | 1" | 2 7/8" | No | 0000000 | 000000 |
Body Material | Each | |
Aluminum | 00000000 | 000000 |
Hazardous Location Pressure Switches
Built with an explosionproof enclosure to meet NEMA 7 and 9 standards for hazardous locations, these switches were tested and verified by UL and CSA for use where explosive liquids, dust, and gas are present. When they reach the set pressure, they power equipment, signal controls, or trigger alarms. They’re 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 listed and CSA certified, these switches are CE marked, so they also meet European safety standards.
All switches are IP and NEMA rated for use outdoors and protection from some corrosion, dust, and spraying water.
IP67 and NEMA 4X rated switches seal out water from temporary submersion and have increased protection against corrosion, similar to 304 stainless steel.
Setpoint, psi | Approximate Difference Between Setpoint and Reset Point, psi | Max. Continuous Pressure, psi | Accuracy | Max. Switching Current | Connection Material | For Use With | Environmental Rating | Each | ||
Wire Leads | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
1/4 NPT Male Pipe Connection | ||||||||||
A | 8-60 | 5 | 60 | ±5% | 5 A @ 125 V AC 5 A @ 250 V AC | 316 Stainless Steel | Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Natural Gas, Water | NEC Class I Division 1 Groups A, B, C, D NEC Class II Division 1 Groups E, F ,G IP67 NEMA 4X NEMA 7 NEMA 9 | 00000000 | 0000000 |
A | 10-100 | 9 | 100 | ±5% | 5 A @ 125 V AC 5 A @ 250 V AC | 316 Stainless Steel | Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Natural Gas, Water | NEC Class I Division 1 Groups A, B, C, D NEC Class II Division 1 Groups E, F ,G IP67 NEMA 4X NEMA 7 NEMA 9 | 00000000 | 000000 |
A | 20-200 | 16 | 200 | ±2% | 5 A @ 125 V AC 5 A @ 250 V AC | 316 Stainless Steel | Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Natural Gas, Water | NEC Class I Division 1 Groups A, B, C, D NEC Class II Division 1 Groups E, F ,G IP67 NEMA 4X NEMA 7 NEMA 9 | 00000000 | 000000 |
A | 50-500 | 60 | 500 | ±2% | 5 A @ 125 V AC 5 A @ 250 V AC | 316 Stainless Steel | Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Natural Gas, Water | NEC Class I Division 1 Groups A, B, C, D NEC Class II Division 1 Groups E, F ,G IP67 NEMA 4X NEMA 7 NEMA 9 | 00000000 | 000000 |
A | 100-1,000 | 87 | 1,000 | ±2% | 5 A @ 125 V AC 5 A @ 250 V AC | 316 Stainless Steel | Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Natural Gas, Water | NEC Class I Division 1 Groups A, B, C, D NEC Class II Division 1 Groups E, F ,G IP67 NEMA 4X NEMA 7 NEMA 9 | 00000000 | 000000 |
A | 200-2,000 | 165 | 2,000 | ±2% | 5 A @ 125 V AC 5 A @ 250 V AC | 316 Stainless Steel | Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Natural Gas, Water | NEC Class I Division 1 Groups A, B, C, D NEC Class II Division 1 Groups E, F ,G IP67 NEMA 4X NEMA 7 NEMA 9 | 00000000 | 000000 |
1/2 NPT Female Pipe Connection | ||||||||||
B | 6-30 | 2 | 30 | ±1% | 5 A @ 125 V AC 5 A @ 250 V AC | 316 Stainless Steel | Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Natural Gas, Water | NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G IP66 NEMA 4 NEMA 7 NEMA 9 | 00000000 | 000000 |
B | 12-60 | 2 | 60 | ±1% | 5 A @ 125 V AC 5 A @ 250 V AC | 316 Stainless Steel | Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Natural Gas, Water | NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G IP66 NEMA 4 NEMA 7 NEMA 9 | 00000000 | 000000 |
B | 20-100 | 3.5 | 100 | ±1% | 5 A @ 125 V AC 5 A @ 250 V AC | 316 Stainless Steel | Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Natural Gas, Water | NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G IP66 NEMA 4 NEMA 7 NEMA 9 | 00000000 | 000000 |
B | 40-200 | 6.5 | 200 | ±1% | 5 A @ 125 V AC 5 A @ 250 V AC | 316 Stainless Steel | Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Natural Gas, Water | NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Division 1 Groups E, F ,G IP66 NEMA 4 NEMA 7 NEMA 9 | 00000000 | 000000 |
B | 80-400 | 11 | 400 | ±1% | 5 A @ 125 V AC 5 A @ 250 V AC | 316 Stainless Steel | Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Natural Gas, Water | NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G IP66 NEMA 4 NEMA 7 NEMA 9 | 00000000 | 000000 |
Hazardous Location Differential Pressure Switches for Air
With an explosionproof enclosure that meets NEMA 7 and 9 standards for hazardous locations, these switches were tested and verified by UL and CSA for use where explosive gas or dust may be present. Often used with ovens, dryers, and HVAC systems, they can indicate a filter is clogged or help maintain a certain air pressure. These switches turn equipment on and off, activate automated controls, or signal alarms when the differential pressure reaches your setpoint. 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 listed and CSA certified, these switches are CE marked and FM approved, so they also meet European safety standards. They also are IP and NEMA rated for use outdoors and protect against dust and splashing water.
When measuring pressure in ductwork, pair them with a static pressure probe.
For technical drawings and 3-D models, click on a part number.
Setpoint Range | Approximate Difference Between Setpoint and Reset Point | Max. Input Pressure | Accuracy | Max. Switching Current | Process Temp. Range, °F | Connection Material | For Use With | Environmental Rating | Each | |
Screw Terminals | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
1/8 NPT Female Pipe Connection | ||||||||||
0.07-0.15 in. of H2O | 0.13 in. of H2O | 45 in. of H2O | ±2% | 15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC | -40° to 140° | Aluminum | Air | IP54; NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Division 1 Groups E, F ,G; NEMA 3; NEMA 7; NEMA 9 | 0000000 | 0000000 |
0.15-0.5 in. of H2O | 0.05 in. of H2O | 45 in. of H2O | ±2% | 15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC | -40° to 140° | Aluminum | Air | IP54; NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Division 1 Groups E, F ,G; NEMA 3; NEMA 7; NEMA 9 | 0000000 | 000000 |
0.4-1.6 in. of H2O | 0.18 in. of H2O | 45 in. of H2O | ±2% | 15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC | -40° to 140° | Aluminum | Air | IP54; NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Division 1 Groups E, F ,G; NEMA 3; NEMA 7; NEMA 9 | 0000000 | 000000 |
1.4-5.5 in. of H2O | 0.35 in. of H2O | 45 in. of H2O | ±2% | 15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC | -40° to 140° | Aluminum | Air | IP54; NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Division 1 Groups E, F ,G; NEMA 3; NEMA 7; NEMA 9 | 0000000 | 000000 |
3-11 in. of H2O | 0.45 in. of H2O | 45 in. of H2O | ±2% | 15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC | -40° to 140° | Aluminum | Air | IP54; NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Division 1 Groups E, F ,G; NEMA 3; NEMA 7; NEMA 9 | 0000000 | 000000 |
4-20 in. of H2O | 0.5 in. of H2O | 45 in. of H2O | ±2% | 15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC | -40° to 140° | Aluminum | Air | IP54; NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Division 1 Groups E, F ,G; NEMA 3; NEMA 7; NEMA 9 | 0000000 | 000000 |
0.5-2 psi | 0.3 psi | 35 psi | ±2% | 15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC | -40° to 140° | Aluminum | Air | IP54; NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Division 1 Groups E, F ,G; NEMA 3; NEMA 7; NEMA 9 | 0000000 | 000000 |
1.5-8 psi | 1 psi | 35 psi | ±2% | 15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC | 0° to 140° | Aluminum | Air | IP54; NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Division 1 Groups E, F ,G; NEMA 3; NEMA 7; NEMA 9 | 0000000 | 000000 |
3-15 psi | 0.9 psi | 35 psi | ±2% | 15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC | 0° to 140° | Aluminum | Air | IP54; NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Division 1 Groups E, F ,G; NEMA 3; NEMA 7; NEMA 9 | 0000000 | 000000 |
4-25 psi | 0.7 psi | 35 psi | ±2% | 15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC | 0° to 140° | Aluminum | Air | IP54; NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Division 1 Groups E, F ,G; NEMA 3; NEMA 7; NEMA 9 | 0000000 | 000000 |
15-50 psi | 1.25 psi | 70 psi | ±2% | 15 A @ 125 V AC 15 A @ 250 V AC 15 A @ 480 V AC | 0° to 140° | Aluminum | Air | IP54; NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Division 1 Groups E, F ,G; NEMA 3; NEMA 7; NEMA 9 | 0000000 | 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 explosionproof 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.
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 | |
Screw Terminals | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
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 2 A @ 30 V DC 1 A @ 48 V DC 500 mA @ 125 V DC | -10° to 200° | Aluminum | Hydraulic Oil (Petroleum Based), Diesel Fuel, Gasoline, 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 2 A @ 30 V DC 1 A @ 48 V DC 500 mA @ 125 V DC | -10° to 200° | Aluminum | Hydraulic Oil (Petroleum Based), Diesel Fuel, Gasoline, 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 2 A @ 30 V DC 1 A @ 48 V DC 500 mA @ 125 V DC | -10° to 200° | Aluminum | Hydraulic Oil (Petroleum Based), Diesel Fuel, Gasoline, 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 2 A @ 30 V DC 1 A @ 48 V DC 500 mA @ 125 V DC | -10° to 200° | Aluminum | Hydraulic Oil (Petroleum Based), Diesel Fuel, Gasoline, 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 |
Remote-Sensor Hazardous Location Line-Voltage Thermostats
Place sensor in enclosures or different rooms than the rest of the thermostat to control temperature from outside the space. Use to regulate line-voltage HVAC systems where flammable gases, vapors, and dust are present. Thermostats are rated Class I, Divisions 1 and 2, Group D; and Class II, Divisions 1 and 2, Groups E, F, and G.
Overall | |||||||||||||
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Voltage | Current, A | Temp. Setting, °F | Switch Type | Ht. | Wd. | Dp. | Sensor Cord Lg., ft. | Mounting Fasteners Included | Mounting Hole Dia. | Specifications Met | Environmental Rating | Each | |
For Air Conditioners and Heaters | |||||||||||||
120V AC-277V AC | 22 | 20° to 80° | SPDT | 5 7/8" | 3" | 3 1/4" | 6 | No | 3/8" | UL Listed, CSA Certified | NEC Class I Divisions 1, 2 Group D NEC Class II Divisions 1, 2 Groups E, F, G NEMA 7 NEMA 9 | 0000000 | 0000000 |