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Proximity Switches

Provide blade position indication. Are installed on the body of the valve.

Technical Specifications:

• Function: SPST – NO, SPDT – NO/NC

• Sensing range: 18mm Barrel 5 mm, 5/8-18 Barrel 2.5 mm

• Compliance/approvals: NEMA 3 (IP54), NEMA 4x (IP56), NEMA 6P (IP67), UL Class I Div. 1 Group A, CSA Class I Div. 2 Group A, CE, ATEX

• Temperature rating: -40 – 220° F | -40 – 105° C

• Voltage ratings: 24-240 VAC/VDC (300 mAmps max.; 5 mAmps min.), 5-240 VAC/VDC (2 Amp max.)

Advantages:

• More accurate reading, compared to other magnetic switch types.

• Because it is a magnetic reading, there is almost no switching noise.

• Versatile; can be used with any actuator type.

Disadvantages:

• Non-adjustable; grounded into the body of the valve.

Magnetic Reed Switches

Provide piston position indication. Magnetic Reed Switches are installed on the tie rods of a pneumatic actuator.

Technical Specifications:

• Function: SPST – normally open

• Compliance/approvals: NEMA 6 (IP67), CSA Class I Div. 2 Group A, CE

• Temperature rating: -5 – 175° F | -20 – 80° C

• Voltage ratings: 24-240 VAC (4 Amps max.), 5-240 VAC/VDC (1 Amp max.; 5 mAmps min.), 0-120 VAC/VDC (0.5 Amps max.)

• Explosion-proof options available

Advantages:

• Adjustable to operator preferences.

• Illuminates for visual indication at-the-valve.

• Because it is a magnetic reading, there is almost no switching noise.

Disadvantages:

• Can provide inaccurate readings in the instance of actuation error.

• Requires a pneumatic actuator with a magnetic piston in order to operate.

Mechanical Limit Switches

Provide piston position indication. Are installed directly onto the actuator.

Technical Specifications:

• Function: SPDT – NO/NC, DPDT – 2NO/2NC

• Compliance/approvals: NEMA 4 (IP56), NEMA 6P (IP67), UL Class I Div. 1 Group B, CSA Class I Div. 2 Group A, CE, ATEX

• Temperature rating: -20 – 185° F | -30 – 85° C

• Voltage ratings: 0-600 VAC/VDC (10 Amps max.)

• Connection options: ½ NPT conduit

Advantages:

• More accurate reading because it is a mechanical process versus a magnetic reading.

Disadvantages:

• Mechanical reading, so switching can be noisy.

• Non-adjustable; grounded to the actuator.

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