Starting at $480.00CAD
Configure
Dwyer

Mark Position Indicators/Switches/Transmitters

A line of position indicators with a selection of various output options

Starting at
$480.00CAD
Have questions? We're here to help!
Have questions? We're here to help!
Call
Email
Configure
Used in
Mark Position Indicators Switches Transmitters 07545
Mark Position Indicators Switches Transmitters 2bd6b
Mark Position Indicators Switches Transmitters d1368

 The Proximity Mark Series is a line of position indicators with a selection of various output options. Three 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.

 • MARK 1

• Features 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
• Features 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.
Temperature Limits:-40 to 176°F (-40 to 80°C). [ATEX flameproof, -B suffix, rated -40 to 80°C (-40 to 176°F) for switch type A, G, M, O, R, S, T, V, or W; -25 to 80°C (-13 to 176°F) for switch type B, D, or I; ATEX intrinsically safe, -IS suffix, rated -25 to 40°C (-13 to 104°F) for switch type I; -40 to 40°C (-40 to 104°F) for switch type O, R, S, V, or W].
Temperature Limits:-58 to 176°F (-50 to 80°C). Switch Type C rated to 350°F (176°C) for 600 hours; Switch Type T rated to 250°F (121°C) continuous. [ATEX flameproof, -B suffix, rated -50 to 80°C (-58 to 176°F) for switch type A, G, H, T, or M; -40 to 80°C (-40 to 176°F) for switch type O, R, S, V, or W; -25 to 80°C (-13 to 176°F) for switch type B, D, I, or AS interface; ATEX intrinsically safe, -IS suffix, rated -25 to 40°C (-13 to 104°F) for switch type D or I; -40 to 40°C (-40 to 104°F) for switch type R, V, or W or -50 to 40°C (-58 to 104°F) for switch type A, G or H.]
Product Rating:Weatherproof and flameproof. NEMA 1, 2, 3, 3R, 3S, 4, 4X, 6, 7, 9, 12, 13. UL rated: Class I, Div. 1 & 2, Groups B, C, D (some units available for Group A, consult factory); Class II, Div. 1 & 2, Groups E, F, and G. CSA rated: Class I, Div. 1 & 2, Groups A, B, C, D; Class II, Div. 1 & 2, Groups E, F, and G; Submersible to 50 feet. Certified Ex d IIC T6 IP68 15 meters). ATEX Compliant: -B suffix, directive 2014/34/EU, KEMA 03 ATEX 2391, II 2 G Ex d IIC T6 for (-25/-40/-50°C = Tamb = 80°C optional wording) depending on output and switch type selected. -IS suffix directive 2014/34/EU, KEMA 03 ATEX 1392X, II 1 G Ex ia IIC T4. (Switch type C is not available with ATEX; Switch type B is not available with ATEX intrinsically safe, -IS suffix). IECEx Compliant: IE suffix, IECEx DEK II.0056X Ex d IIC T6 Gb for -25°C/-40°C/-50°C = Tamb = 70°C and T5 for -25°C/-40°C/-50°C = Tamb = 80°C. II suffix, IECEx DEK II.0061X II Ex ia IIC T4 Ga. Compliant per EN 60079-0:2007 EN 60079-11:2006 and EN 60079-26:2006.
Rotational Travel:Mark 1 and 4: Maximum 330°; Mark 3: Minimum: 1.5 revolutions, Maximum: 8.5 revolutions.
Conduit Connection:3/4" female NPT standard. Optional one or two 1/2" female NPT. M25 and M20 optional.
Zero and Span Adjustments:Pushbuttons or HART® master for setting both. Mark 1 and 4: Span is adjustable from 0 to 330°; Mark 3: Span is adjustable from 1.5 to 8.5 revolutions.
HART® Receive Impedance:Rx = 500 kohm; Cx = 2500 pF.
Output Signal:4 to 20 mA.
Current Consumption:21 mA.
Power Requirements:8 to 30 VDC.
Temperature Limits:-40 to 176°F (-40 to 80°C). [ATEX flameproof, -B suffix, rated -40 to 80°C (-40 to 176°F) for switch type A, G, M, O, R, S, T, V, or W; -25 to 80°C (-13 to 176°F) for switch type B, D, or I].
Accuracy:±0.25% of full span.
Transmitter w/HART® (Mark 1, 3 and 4)
Rotational Travel:Mark 1 and 4: Minimum 50°, Maximum 300°; Mark 3: Minimum: 1.5 revolutions, Maximum: 8.5 revolutions.
Conduit Connection:3/4" female NPT standard. Optional one or two 1/2" female NPT. M25 X 1.5 and M20 X 1.5 optional.
Zero and Span Adjustments:Trim pots for adjusting both. Mark 1 and 4: Span is adjustable from 50 to 300°; Mark 3: Span is adjustable from 1.5 to 8.5 revolutions.
Output Signal:4 to 20 mA.
Current Consumption:50 mA.
Power Requirements:5 to 30 VDC.
Temperature Limits:-40 to 176°F (-40 to 80°C). [ATEX flameproof, -B suffix, rated -40 to 80°C (-40 to 176°F) for switch type A, G, M, O, R, S, T, V, or W; -25 to 80°C (-13 to 176°F) for switch type B, D, or I; ATEX intrinsically safe, -IS suffix, rated -25 to 40°C (-13 to 104°F) for switch type I; -40 to 40°C (-40 to 104°F) for switch type O, R, S, V, or W].
Accuracy:±0.5% of full span. Optional ±0.25% of full span.
Transmitter (Mark 1, 3 and 4)
Rotational Travel:Mark 1 and 4: Minimum 0°, Maximum 340°; Mark 3: 0 to 10 revolutions.
Zero and Span Adjustments:Span trim pot with 2000Ω adjustment. No zero adjustment.
Output Signal:1000Ω standard. Optional 2000, 5000, 10000, or 20000 Ω.
Power Rating:1.5 watt maximum.
Accuracy:±0.5% of full span. Optional ±0.25% of full span.
Potentiometer (Mark 1, 3 and 4)
Set Point Adjustment:Mark 1 and 4: 5 to 360°.
Electrical Rating:See Model Chart page.
Switch Type:See Model Chart page.
Switch Outputs (Mark 1, 3 and 4)
• Rotary valve actuators and dampers
• Linear valve actuators and cylinders
• Manual valves
• Gear operators
• Positioners
  • Thumbnail of document Manual - Mark Position Indicators/Switches/Transmitters
    Download

    Manual - Mark Position Indicators/Switches/Transmitters

    Download
  • Thumbnail of document Data Sheet - Mark Position Indicators/Switches/Transmitters
    Download

    Data Sheet - Mark Position Indicators/Switches/Transmitters

    Download

Request a Calibration Quote

We’re here to make calibration easy. Request a quote today and let our team give you the care, precision, and service you can trust.
Learn more

Browse By Brands

Uncover the brands that set the standard for quality and dependability in every industry we serve.
Learn more

Sign up to receive email updates on new product launches, promotions, news, blogs, Brand's Brands videos and so much more!