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Series MARK Position Indicator/Switch/Transmitter

Brand: Dwyer Instruments, LLC
Does not ship to VA, United States
The Proximity Mark Series is a line of position indicators with a selection of various output options.

Four model styles make up the Mark series to cover almost any application.

Standard models in the Mark Series have visual position indicators and are weatherproof, explosion-proof, and submersible. 

A large variety of outputs are available to fit specific applications. There is a choice of 1 to 6 switch outputs of 14 varieties including inductive sensors, high temperature switches, gold contact switches, hermetically sealed switches, and high current switches.

Besides the switch outputs, the Series offers potentiometer outputs, transmitters, and HART® Communications. 

The units are purchased for either direct drive applications, such as rotary valves, or lever drive applications, such as linear valves. Adjustable visual indicator is standard on direct drive units that displays OPEN/CLOSED status and degrees.

A magnetic drive that completely seals the switch compartment from the atmosphere for maximum leak protection is utilized in the Mark 1.

The Mark 3 uses the same magnetic drive of the Mark 1, but it can be used for multi-turn applications with 1 to 25 revolutions, such as gate valves.

A through shaft drive is incorporated in the Mark 4 making the unit a lower cost alternative to the Mark 1 for applications that are not as demanding.
Features
  • MARK 1
    • Has a magnetic coupling that isolates the switch compartment, completely sealing the unit from the surrounding atmosphere for maximum hazard and leak protection.
    • EZset cams on switch models provide simple set point adjustment.
    • Flexible design allows multiple switches and transmitter options.
    • Ideal for corrosive environments.
  • MARK 3
    • Has a magnetic coupling that isolates the switch compartment, completely sealing the unit from the surrounding atmosphere for maximum hazard and leak protection.
    • Multi-Turn models that can provide switch signals between 1 and 25 revolutions, and transmitter models for up to 10 revolutions without gear reduction.
    • Flexible design allows multiple switches and transmitter options.
    • Ideal for corrosive environments.
  • MARK 4
    • Thru-Shaft design that features a 1" bearing for long life and o-rings to seal the switch compartment for hazard, corrosion, and leak protection.
    • EZset cams on switch models provide simple set point adjustment.
    • Flexible design allows multiple switches and transmitter options.
    • A lower cost alternative to the Mark 1 Series for less demanding applications.
The Proximity Mark Series is a line of position indicators with a selection of various output options.

Four model styles make up the Mark series to cover almost any application.

Standard models in the Mark Series have visual position indicators and are weatherproof, explosion-proof, and submersible. 

A large variety of outputs are available to fit specific applications. There is a choice of 1 to 6 switch outputs of 14 varieties including inductive sensors, high temperature switches, gold contact switches, hermetically sealed switches, and high current switches.

Besides the switch outputs, the Series offers potentiometer outputs, transmitters, and HART® Communications. 

The units are purchased for either direct drive applications, such as rotary valves, or lever drive applications, such as linear valves. Adjustable visual indicator is standard on direct drive units that displays OPEN/CLOSED status and degrees.

A magnetic drive that completely seals the switch compartment from the atmosphere for maximum leak protection is utilized in the Mark 1.

The Mark 3 uses the same magnetic drive of the Mark 1, but it can be used for multi-turn applications with 1 to 25 revolutions, such as gate valves.

A through shaft drive is incorporated in the Mark 4 making the unit a lower cost alternative to the Mark 1 for applications that are not as demanding.
Features
  • MARK 1
    • Has a magnetic coupling that isolates the switch compartment, completely sealing the unit from the surrounding atmosphere for maximum hazard and leak protection.
    • EZset cams on switch models provide simple set point adjustment.
    • Flexible design allows multiple switches and transmitter options.
    • Ideal for corrosive environments.
  • MARK 3
    • Has a magnetic coupling that isolates the switch compartment, completely sealing the unit from the surrounding atmosphere for maximum hazard and leak protection.
    • Multi-Turn models that can provide switch signals between 1 and 25 revolutions, and transmitter models for up to 10 revolutions without gear reduction.
    • Flexible design allows multiple switches and transmitter options.
    • Ideal for corrosive environments.
  • MARK 4
    • Thru-Shaft design that features a 1" bearing for long life and o-rings to seal the switch compartment for hazard, corrosion, and leak protection.
    • EZset cams on switch models provide simple set point adjustment.
    • Flexible design allows multiple switches and transmitter options.
    • A lower cost alternative to the Mark 1 Series for less demanding applications.
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Specifications

Brand

Accuracy

  • ± 0.25 % of Span
  • ± 0.5 % of Span

Approvals & Certifications

  • CSA
  • Ex
  • IEC Ex
  • UL

Conduit Connection

  • 1/2” NPT Female
  • 3/4” NPT Female

Consumption

  • 1.5 W Potentiometer (Mark 1, 3 & 4)
  • 21 mA Transmitter w/ HART (Mark 1, 3 & 4)
  • 50 mA Transmitter (Mark 1, 3 & 4)

Environmental Protection

  • Explosion-proof
  • Flameproof
  • Intrinsically Safe

Output

  • 1,000 ohms
  • 4-20 mA

Power Requirement

  • 5 to 30 Vdc Transmitter (Mark 1, 3 & 4)
  • 8 to 30 Vdc Transmitter w/ HART (Mark 1, 3 & 4)

Rotation

  • 0° Min. Potentiometer (Mark 1 & 4)
  • 300°, Max.
  • 330°, Max.
  • 340°, Max.
  • 5° to 360° Switch Outputs (Mark 1 & 4)

Switch Type

  • SPDT

Temperature Range

  • -50° to 80° C (-58° to 176° F)
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Applications

  • Rotary Valve Actuators and Dampers
  • Linear Valve Actuators and Cylinders
  • Manual Valves
  • Gear Operators
  • Positioners
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