LINEAR DISPLACEMENT POTENTIOMETER

SIMPLE INSTALLATION,
NO CRITICAL ALIGNMENT,
MINIMUM WEAR UNDER VIBRATION

This range of low cost linear position transducers will provide linear measurement of the movement of a valve, actuator, damper, or any other moving device, and provide a current, voltage or resistive feedback signal proportional to position.

The transmitter uses a rotary potentiometer as the variable element. A coated steel wire is wound onto a pulley wheel with a constant force spring arrangement for cord retraction. The construction provides a measure of damping if the anchor point of the wire is subject to vibration, and obviates mechanical wear if the motion is out of line with the potentiometer.

Standard Industrial Linear Potentiometer
Available as: 3 wire potentiometric or 2 wire 4-20mA current loop, 3 wire 0-10v, both with adjustable Span and Zero.
Measuring ranges: from 35mm to 1250mm.
Size (mm): 140 long (inc. feet), 65 wide, 56 high.
Sealed to IP55.
Shown with 2 wire 4-20mA current loop and armoured cable.

Shown with 2 wire 4-20mA current loop, nylon coated stainless steel cord with split ring connector and optional plug & socket electrical connector.

Nominal travel (mm) 35 75 150 300 500 1000 1250

Potentiometer type
CP = Conductive Plastic
WW = Wire Wound CP CP WW WW WW WW WW

Standard Resistance overall 1K 1K 1K 1K 1K 1K 1K

Linearity better than (%) 2 2 1 1 1 1 1

Repeatability (typical)(%) 0.1 0.1 0.1 0.1 0.1 0.1 0.1

Industrial Linear Potentiometer - Extended Stroke
Available as: 3 wire potentiometric or 2 wire 4-20mA
current loop, 3 wire 0-10v, both with adjustable Span and Zero.
Measuring ranges: from 1300mm to 1650mm.
Size (mm): 170 long (inc. feet), 102 wide, 76 high.
Sealed to IP55.

Shown with 3 wire potentiometer, nylon coated stainless steel cord with split ring connector and standard PVC electrical cable.

Industrial Linear Potentiometer - Long Stroke
Available as: 3 wire potentiometric or 2 wire 4-20mA current loop and 3 wire 0-10v, both with adjustable Span and Zero.
Measuring ranges: from 1500mm to 5000mm (to 10000mm in higher case).
Size (mm): 222 long (inc. feet), 122 wide, 56 high, (106 high case).
Sealed to IP55.

Shown with 2 wire 4-20mA, nylon coated stainless steel cord with latched hook connector and standard PVC electrical cable. Shown with clear display lid.

Low Cost OEM Active Open Frame Linear Potentiometer
Available as: 2 wire current loop and 3 wire 0-10v, both with adjustable Span and Zero.
Measuring ranges: from 20mm to 800mm.Size (mm): 100 long, 52 wide, 52 high.

Shown with Kevlar non-kink cord and latched hook connector.

Low Cost OEM Passive Open Frame Linear Potentiometer
Available as: 3 wire potentiometric.
Measuring ranges: from 20mm to 800mm.
Size (mm): 90 long, 52 wide, 52 high.

Shown with stranded stainless steel cord and latched hook connector.

Telescopic Linear Potentiometer
Available as: 3 wire potentiometric or 2 wire 4-20 mA.
Measuring ranges: Up to 2 meters.
Rated: IP65

External Signal Transmitter for Linear Potentiometer
Permits span and zero adjustment to be located in a convenient position if transducer is inaccessible.
Available as: 2 wire 4-20mA, supply voltage between 8 and 35 volts.
3 wire 0-10v, 24v dc supply required, other voltages on request.

Standard Features
Constant force return spring even up to the longest pull version.
Ceramic brush for the cord exit to reduce wear, miss-alignment of cord up to 30 degree.
Rolling bearings on main shaft to extend life and decrease stiction (except low cost OEM position transducer).
3 wire potentiometric (1 kOhm standard, other values available).
Nylon coated S/Steel pull cord.

Options
Alternative pull cord materials, e.g. braided stainless steel, Kevlar.
Pull cord extensions for mounting at a distance from the subject.
Various end fittings can be supplied, e.g. split ring, snap link, anti-rotation swivel.
Electrical plug and socket can be supplied.
Armoured cable for harsh environments.
Custom brackets and pulleys to suit client's application.
Non-standard pull lengths.
Integral 4-20 mA 2-wire transmitter, or 0-10 V 3-wire transmitter;.
The transmitter versions have span and zero calibration adjustments built in.
The transmitter electronics are also available as a stand-alone device to bring the span and zero adjustments to a convenient location away from the linear displacement transducer, e.g. in a safe area.

CLICK HERE for case studies using LDP.
CLICK HERE for editorial in Manufacturingtalk on JK Controls low cost transducers.

Contact Information: e-mail to info@jkcontrols.co.uk, or telephone +44 2380 892021

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