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Sensors & Instrumentation - Linear Displacement - Draw Wire Actuated


Using a wire attached to a drum, these products from various manufacturers, measure from 25mm to 40 meters. The flexible wire allows for linear measurements and an inventive range of measurements such as round the corner, circumference, angle and even 3D position.
Measuring device include
• potentiometers,
• incremental encoders,
• absolute encoders.
Output options include
• 3 wire potentiometer
• Potentiometer outputs available as voltage and 4 to 20mA.
• Incremental encoder ABx, ABI, ABO and compliment
• Absolute Gray Code
• add on boards Gray Code to analogue
4-20mA Displays
Various readout panel meters available including BU MAXI Series of BIG DIGIT readouts.


Jump to family:

 SIKO SG10 Series
 SIKO SGx Series
 RPD DWT Series
 SIKO SGL series
 SIKO SG20 Series
 Firstmark 150 Series
 Firstmark Series 6
 Firstmark 170 Series
 Firstmark 17x Series
 Firstmark M series
 SIKO SG21 Series
 SIKO SG31 series

SIKO SG10 Series
The SIKO SG10 series is a compact, wire actuated linear measuring device with orange plastic case and 40x55mmm footprint. Interface via a cable.
Standard Models
500mm, 1000mm and 2000mm models
P10 = 10K potentiometer standard.
Cable = 2m three wire
Indent Options
MWI = 0 ~ 10volts from transducer
MWU = 4 ~ 20mA from transformer
IGV28-0004 = 0.1mm steps from incremental encoder type
Cable Options = 0.5m ~ 30.0m (for Pot, MWI and MWU)
Cable Options = 0.5m ~ 2.0m (for IGV28-0004)
Specifications:
Pull force 10N
Temp -10 to +85°C
Travel Speed max 800mm/s
Case: reinforced plastic, orange and black.
1.RA20-2-0-0-500-1-R ... [more details]
SIKO panel meter, 3.5 digits (±1999), factory set for 0 to 500mm (1mm increments) matching SG and SGP 500mm wire actuators, Operating voltage 230Vac, 3 wire resistive input.
2.SG10-300-P10-2.0 ... [more details]
Model SG10 500mm draw wire actuator - SG10-300-P10-2.0 SIKO Wire Actuator, Small Format, 300mm, 10K potentiometer, voltage output and 2m, 3 wire electrical cable.
3.SG10-500-P10-2.0 ... [more details]
SIKO Wire Actuator, Small Format, 500mm, 10K potentiometer, voltage output and 2m, 3 wire electrical cable.
4.SG10-1000-P10-2.0 ... [more details]
SIKO Wire Actuator, Small Format, 1000mm, 10K potentiometer, voltage output and 2m, 3 wire electrical cable.
5.SG10-2000-P10-2.0 ... [more details]
SIKO Wire Actuator, Small Format, 2000mm, 10K potentiometer, voltage output and 2m, 3 wire electrical cable.
6.SG10-2000 I-IGV28-0004-2.0 ... [more details]
SIKO SG10 Wire Actuator, 2000mm measuring range, incremental encoder output, 2.0 metre electrical cable length

SIKO SGx Series
SIKO SGx family of wire actuators are universally applicable designs, with precise and safe cable guidance systems, robust Aluminium housing and strong mounting flange.
Three measuring systems provide a combination of convenience and high accuracy.
1) SGP series with Potentiometer,
2) SGI series with Incremental Encoder,
3) SGW series with Absolute Encoder,
Measuring range is 250mm to 6000mm.

Draw wire types:
S Stainless steel (6000mm max) (our standard design)
SK Plastic coated steel wire (4000mm max) ( 2 times more tear-resistant than steel cable)
P para-line non-conducting synthetic line (2750mm max) (4 times more tear resistant than steel cables)

SGP Series with potentiometer
Electrical: via terminal block in casing.
Potentiometer values: 1, 2, 5, 10K
< 500 mm Type 01: Resistance tolerance ±10%, linearity ±1% Max Load=2W @T = 40°Cmax
> 500 mm Type 02: Resistance tolerance ±5%, linearity ±0.25% Max Load=1W @T = 40°Cmax
> 500 mm Type 03: Resistance tolerance ±5%, linearity ±0.25% Max Load=2W @T = 40°Cmax
3 wire interconnection for poteniometer models.
Optional 4-20mA
4-20mA, 2 wire interface via an instrument transformer for models using 10K pot. Internal start and end point adjustments using trimming potentiometers. M=with / X=without.
Display Meter: eg SIKO MA50

SGI Series with incremental encoder
Standard Encoder: IV58-003
Operating Voltage: 24Vdc @ 70mA
Output circuit: PP
Output Signal: ABO
Resolution: 10 pulses / mm
Electrical cable: 1m
Protection Class: IP54
Display meter: eg SIKO Model 10/4 with PP inputs

SGW Series with absolute encoder
Standard Encoder: MV58-0001
Operating Voltage: 24Vdc @ 30mA
Steps per revolution: 4096 (12bit) at 204.8mm drum circumference
Output Signal: SSI
Resolution: 1 bit = 0.05mm
Electrical cable: 1m
Protection Class: IP54
Display meter: eg SIKO Model 10/4 with SSI inputs

Options:
• Choice of draw wire cable
• Extension to draw wire cable.
• 1 or 2 limit switches.

Accessories
• Model UR, guide wheels.
• Model SV, cable extension fitting.

Application recommendations :
• The wire should be pulled out straight to avoid wear (else use guide roller UR).
• The wire must not freely snap back into the housing.
• Recommend starting measurement with 5mm cable extension.
1.SGP-500-S-01-10-X ... [more details]
SIKO Wire Actuator, 500mm, stainless steel wire, type 01 10K potentiometer, voltage output.
2.SGP-2750-S-02-10-X ... [more details]
SIKO Wire Actuator, 2750mm, stainless steel wire, type 02, 10K potentiometer, voltage output
3.SGP-500-S-01-10-M ... [more details]
SIKO Wire Actuator, 500mm, stainless steel wire, Type 01, 10K potentiometer, with intrument transformer (4-20mA)
4.SGP-6000-S-02-10-M ... [more details]
SIKO SGP series wire actuator for 6000mm, stainless steel wire, with 10K pot and 4-20mA interface with 12 to 28Vdc supply.
5.SGI-4000-1-S-N58 ... [more details]
SIKO wire actuated incremental encoder, 4000 mm measuring range, 1 mm pre-extension cable, stainless steel cable, model IV58-003 incremental encoder
6.SGW-4000-1-204.8-S-WV58 ... [more details]
SIKO SGW wire actuated absolute encoder, 4000mm measuring range, 1 mm pre-extension cable, 204.8 mm drum, Stainless Steel cable, with WV58-007 absolute encoder

RPD DWT Series
The RDP Electronics DWT series is a draw wire displacement transducer, 6 models from 600mm to 3500mm. Design for draw wire speed to 2m/s and life cycle of 1,000,000 full cycles.

Simple installation involves bolting down the housing and attaching the draw wire to the moving part, which is to be measured and adjusting span and zero. The output of the draw wire displacement transducer is proportional to the amount of cable pulled out of the unit. The plastic coated steel draw wire is tensioned by an internal spring pack, giving the unit an ability to measure around corners.
The control output of the draw wire transducer can be in the form of a resistance (pot), DC voltage or current loop.
Options
Std case (10)or Sealed die cast case (20).

Wire Extension options.
(06)=600mm, (10)=1000mm, (20)=2000mm, (15)=1500mm,
(20)=2000mm, (25)=2500mm, (35)=3500mm.

Output Options
(AO)=4-20mA
(CO)=0-10Vdc output.
(DO)=500R Potentiometer
(AR)=LCD Display with 4-20mA
(CR)=LCD Display with 0-10Volts

(1)=DIN Connector or (3)=cable gland.
1.DWT-10-15-AO-3-E ... [more details]
RDP Draw Wire Actuator, Std Housing with Zero and Span, 1500mm wire extension, 4-20mA output, cable gland, calibrated in mm.
2.DWT-10-20-AR-3-E ... [more details]
RDP Draw Wire Actuator, Std Housing with Zero and Span, 2000mm wire extension, LCD display, 4-20mA output, cable gland, LCD calibrated in mm.
3.DWT-20-2000-AO-3-E ... [more details]
RDP Draw Wire Actuator, Sealed Housing with Zero and Span, 2000mm wire extension, 4-20mA output, cable gland, calibrated in mm

SIKO SGL series
SIKO Draw Wire Actuator for linear distance.
3 models for 13,500mm, 27,000mm and 40,000mm.
High precision and robust design enable its use in nearly all fields of application with long measuring distances.

Featues
• 3 versions for measuring lengths of 13.5 m, 27 m, 40 m
• high flexibility due to freely selectable rotary encoder versions
• forced-guided wire drum ensures high operation safety
• tear-proof steel wire, synthetic “paraline“ available as an option.
Options
Position Sensors
• GP03 Potentiometer. (lowest cost)
• GP43 geared potentiometer and 1 to 3 limit switches
• GP63 geared potentiometer with 4-20mA output and 1 to 3 limit switches.
• MV58P Absolute encoder with Std encoder or PROFIBUS interface. Options on interface, cable length, steps per revolution, total number number of revolutions $call.
1.SGL135 ... [more details]
SIKO SGL draw wire actuator for 15m, with GP63 Geared potentiometer, with 4-20mA output, 3 limit switches.
2.SGL270 ... [more details]
SIKO SGL draw wire actuator for 27m, with GP63 Geared potentiometer, with 4-20mA output, 3 limit switches.
3.SGL400 ... [more details]
SIKO SGL draw wire actuator for 40m, with GP63 Geared potentiometer, with 4-20mA output, 3 limit switches.

SIKO SG20 Series
SIKO SG20 Series:
The SIKO SG20 series is a compact, wire actuated linear measuring transducer with a robust die-cast case.
Easy Mounting via 2 of M4 x 8mm tapped holes.
Standard Measuring Lengths: 1250, 1500, 1750, 2000mm.
Electrical Interface:Integral cable or connector and cable.

SIKO SG20 P10 table
SIKO SG20 with P10 encoder, 10K potentiometer. 
FeatureTechnical Information
Value of resistance10kohm
Linearity of potentiometer0.25%
Resistance tolerance±5%
Power rating1 watt
Pull-out length0mm = 0 ohm
Cable length (3 wire connection)Max = 30m
Please use the ORDER CODE BUILDER to specify for your application: 


SIKO SG20 4-20mA table
SIKO SG20 with 4-20mA output. 
FeatureTechnical Information
Output current4-20mA
Measuring transducer10K potentiometer
Operating voltage14 to 28Vdc
Load resistance< 500 ohms
Cable length (2 wire connection)Max = 30m
Please use the ORDER CODE BUILDER to specify for your application: 


SIKO SG20 0-10Vdc table
SIKO SG20 with 0-10Vdc output. 
FeatureTechnical Information
Output voltage0-10Vdc
Measuring transducer10K potentiometer
Operating voltage14 to 28Vdc
Recommend load resistance2 ~ 10Kohm to GND
Cable length (3 wire connection)Max = 20m
Please use the ORDER CODE BUILDER to specify for your application: 
1.SG20-1250-P10-E1-2-T1 ... [more details]
SIKO SG20 draw wire actuated encoder, 1250mm measuring length, with 10Kohm potentiometer, with integral cable, 2 metre electrical cable length, -10°C to +80°C, IP50 protection.
2.SG20-2000-MWI-E1-2-T1 ... [more details]
SIKO SG20 draw wire actuated encoder, 2000mm measuring length, with 4-20mA loop current, with integral cable, 2 metre electrical cable length, -10°C to +80°C, IP50 protection.
3.SG20-0014 ... [more details]
SIKO Wire Actuated 2000mm range,0-10V output

Firstmark 150 Series
Firstmark Controls Series 150
Analogue output, ultra-small sub miniature position transducer.
1: 1.5-Inch (38-mm) Maximum Travel
2: Analogue Signal Using Precision Conductive Plastic Potentiometer
3: AccuTrak™Grooved Drum for Enhanced Repeatability
4: Small, Robust Design
5: Choice of Displacement Cable Pull Direction
DirectConnect™ Sensor-To-Drum Technology = Zero Backlash, No Torsion Springs or Clutches
Potentiometer Specifications
Potentiometer Type1-turn, precision, conductive plastic
Resistance: Value, Tolerance5K ohms, ±10%
Travel: Electrical, Mechanical340°, 340° min
Mechanical Life5 million shaft revolutions min
Output Signalanalog signal from 0 to supply voltage (voltage divider circuit)
Power Rating0.75 W at 158° F (70° C)
Supply Current12 mA max
Supply Voltage35 VDC max (using voltage divider circuit)
Independent Linearity Error±1.0% max per VRCI-P-100A
Output Smoothness0.1% max
Insulation Resistance1000 Mohms at 500 VDC min
Dielectric Strength500 VDC min
Resolutioninfinite signal
Operating Temperature-85° to +257° F (-65° to +125° C)
Shock, Vibration100 g for 6 ms, 10 to 2000 Hz at 15 g per Mil-R-39023
Temperature Coefficient±400 ppm/°C max

Options
• Cable displacement tension
• left and right hand cable pull
• mounting base plates.
Other Specifications
Case materials: Precision machined Anodised 2024 aluminium.
Measuring Cable: 7 by 7 strand stainless steel, 0.46mm diameter, 177N breaking strain.
Electrical cable: 250mm cable with teflon insultation.
Typical weight: 15 gram
Water Protection: NEMA 3S/IP54.

Link to newsletters: http://www.firstmarkcontrols.com/pmcmain.htm
1.150-0121-L1N-305-457 ... [more details]
Firstmark Controls wire actuator, series 150 with left hand cable pull, light cable tension, no special mounting base parts.

Firstmark Series 6
The Firstmark Controls Series 6 measures linear distance from 0 to 102mm through to 0 to 2159mm. To make this a leading edge product the design team created flexible output arrangements, a wide range of accessories (so essential when tackling a wide range of measuring tasks), plus the usual standard of precision engineering design for accurate measurements and long life.
The company web site has excellent documentation to ensure you can use these products to the best advantage.

Series 6 – the flexibility is designed into the product.
1. 102mm to 2159-mm Maximum Travel through 5 ranges.
2. Choice of Analogue and Digital Output Signals.
:: Output Signal selection includes
::: 4-20 mA
::: FlexSignalTM Voltage Regulator
::: Flexible User Adjustable Zero and Span Controls
::: Unipolar and Bipolar Outputs
::: 0-5 VDC, 0-10 VDC, ±5 VDC, ±10 VDC,
::: Digital (Quadrature)
::: Voltage Divider
::: Low-Level Bridge (B Circuit / Strain Gage Compatible)
3. AccuTrakTM Threaded Drum For Enhanced Repeatability
4. DirectConnect Sensor-To-Drum Technology = Zero Backlash, No Torsion Springs or Clutches
5. NEMA 6 / IP 66 Environmental Protection
6. Flexible Mounting Bases
7. Industrial Operating Temperature Ranges

Specifications:-
VOLTAGE DIVIDER (hybrid or conductive plastic precision potentiometer) Item 1-turn sensor 3- and 5-turn sensors
Resistance: Value, Tolerance 5K ohms, ±10%
Travel: Electrical 340° 1080° (3-turn), 1800° (5-turn)
Travel: Mechanical 360° continuous 1080° (3-turn), 1800° (5-turn) (+15° -0°)
Mechanical Life 5 million shaft revolutions min.
Power Rating 1.0 W at 158° F (70° C); 50 VDC / 12 mA max 2.0 W at 158° F (70°C); 50 VDC / 12 mA max
Independent Linearity Error ±0.5% max per VRCI-P-100A ±0.25% max per VRCI-P-100A
Output Smoothness 0.1% max 0.051% max
Insulation Resistance 1000 Mohms min at 750 Vrms
Dielectric Strength 750 Vrms min 1000 Vrms min
Resolution infinite signal infinite signal
Operating Temperature -40° to 185° F (-40° to 85° C) -40° to 185° F (-40° to 85° C)
Shock / Vibration 100 g for 6 ms / 10 to 500 Hz at 10 g 100 g for 6 ms / 10 to 2000 Hz at 15 g
Thermal Coefficient ±0.01%/°C max.
1.60-11-5121 ... [more details]
Firstmark Controls Series 6, measuring range 102mm, Cable tension option 5, standard 3 wire potentiometer, base: standard (60); pn 160015-1, flying leads of 1524 mm (60 inches)
2.60-11-5421 ... [more details]
Firstmark Controls Series 6, measuring range 102mm, Cable tension option 5, voltage output of 0-5Vdc., base: standard (60); pn 160015-1, flying leads of 1524 mm (60 inches)
3.60-11-5621 ... [more details]
Firstmark Controls Series 6, measuring range 102mm, Cable tension option 5, 4-20mA output, base: standard (60); pn 160015-1, flying leads of 1524 mm (60 inches)
4.60-25-5121 ... [more details]
Firstmark Controls Series 6, measuring range 343mm, Cable tension option 5, standard 3 wire potentiometer, base: standard (60); pn 160015-1, flying leads of 1524 mm (60 inches)
5.60-35-6121 ... [more details]
Firstmark Controls Series 6, measuring range 540mm, cable tension option 6, standard 3 wire potentiometer, base: standard (60); pn 160015-1, flying leads of 1524 mm (60 inches)
6.61-45-7131 ... [more details]
Firstmark Controls Series 6, measuring range 762mm, cable tension option 7, standard 3 wire potentiometer, base: standard (61); pn 160015-3, flying leads of 1524 mm (60 inches)
7.62-55-7141 ... [more details]
Firstmark Controls Series 6, measuring range 1080mm, cable tension option 7, standard 3 wire potentiometer, base: standard (62); pn 160015-5, flying leads of 1524 mm (60 inches)
8.62-55-7641 ... [more details]
Firstmark Controls Series 6, measuring range 1080mm, cable tension option 7, 4-20mA output, base: standard (62); pn 160015-5, flying leads of 1524 mm (60 inches)
9.62-60-8641 ... [more details]
Firstmark Controls Series 6, measuring range 2159mm, cable tension option 8, 4-20mA output, base: standard (62); pn 160015-5, flying leads of 1524 mm (60 inches)

Firstmark 170 Series
2.0-Inch (51-mm) Maximum Travel
Analog Signal Using Precision Conductive Plastic Potentiometer
AccuTrakTM Grooved Drum for Enhanced Repeatability
Bearing-Mounted Rotating Components
Optional Flexible Mounting Bases
Integrated Left-Hand and Right-Hand Mounting
DirectConnectTM Sensor-To-Drum Technology = Zero Backlash, No Torsion Springs or Clutches
1.170-0161-1N ... [more details]
Firstmark Controls 51mm wire actuator, cable tension 010, no mounting base

Firstmark 17x Series
four models in this family
3.0 inch (76mm) maximum Travel (Series 173) to
6.5-inch (165-mm) Maximum Travel (Series 176)
Analog Signal Using Precision Conductive Plastic Potentiometer
AccuTrak™ Grooved Drum for Enhanced Repeatability
Bearing-Mounted Rotating Components
Optional Flexible Mounting Bases
DirectConnect™ Sensor-To-Drum Technology = Zero Backlash, No Torsion Springs or Clutches
1.173-1241-L1N ... [more details]
Firstmark Controls series 173 for 76mm range, left hand displacement cable pull, cable tension 010, no mounting base
2.174-0321-L3N ... [more details]
Firstmark Controls series 174 for 102mm range, left hand displacement cable pull, cable tension 030, no mounting base
3.175-0401-L3N ... [more details]
Firstmark Controls series 175 for 127mm range, left hand displacement cable pull, cable tension 030, no mounting base
4.176-0521-L3N ... [more details]
Firstmark Controls series 176 for 165mm, left hand displacement cable pull, cable tension 030, no mounting base

Firstmark M series
A low profile, flexible unit well suited volume production.
Summary Features

1. 85-Inch (2159-mm) Maximum Travel in a Ø3.5-Inch (Ø89-mm) Package
2. DirectConnect™ Sensor-To-Drum Technology = Zero Backlash, No Torsion Springs or Clutches
3. Optimum Fleet Angle for More Repeatable Displacement Cable Wrap
4. Fixed or Adjustable Mounting Features
5. Compatible with Self-Tapping or User-Supplied Washer/Nut/Screws
6. Low-Inertia Drum
7. High-Strength Engineering Plastic Cover and Case
8. Long-Life Spring (100,000 Full-Stroke Cycles Minimum)
9. Choice of Analog (Voltage Divider Or Rheostat) or Digital (Quadrature) Sensors
10. Upright Mounting Base (Optional)
11. Flexible Signal Conditioning (Optional)
12. Infinite-Resolution 360° Mounting Alignment
13. RoundAbout™ Cable Exit Capable (Optional)
14. Perfect for Cost-Sensitive, Large-Volume Applications
1.4100-85[P]-1B-2D-3C ... [more details]
Firstmark Controls M series for 2159mm (85"), with mounting base, with cover plate and flying leads, potentiometer with 4-20mA output.
2.4100-85[AB]-1B-2E ... [more details]
Firstmark Control series M for 2159mm(85"), incremental encoder with AB signals, with mounting base, with cover plate and connector.

SIKO SG21 Series
The SIKO SG21 is a small footprint draw wire actuated encoder with 2000 mm measuring length, tough zinc die cast housing and encoder mount.

Profile
    Wire-actuated encoder for rotary encoder with max. Ø40 mm flange
  • Measurement lengths up to 2000 mm
  • sturdy zinc die-cast housing, robust design,
  • stable measuring rope (stainless steel)
  • very compact design


SIKO SG21 Series is design for interface with the rugged M (Magnetic) series incremental and absolute series encoders.

1.SG21-IV28M/1-T1 ... [more details]
A SIKO SG21 zinc die cast draw-wire actuated incremental encoder type IV28M/1-ABO-E1-A-1.0-PP-6x10, for 0-2000mm draw.

SIKO SG31 series
SIKO SG31 draw-wire base unit.
SIKO SG31 + AV58M-MWi provides 4-20mA output, with user programmable span.
SIKO SG31 + AV58M-MWu provides 0-10Vdc output, with user programmable span.
SIKO SG31 has a robust case design, well suited to applications including crane construction, agriculture and forestry, stage construction, warehousing technology, etc.

Profile SG31
  • Robust design
  • Maximum Measuring length = 3000 mm
  • Using AV58M encoder: user programmable 4-20mA/0-10Vdc range minimum 0~12.5mm, maximum 0~3000mm
  • Using AV58M encoder: Resolution is 12bit
  • Variable mounting options
  • Lockable ventilation holes against condensation
  • Very robust measuring rope(stainless steel)
  • High tightness at the rope outlet
  • other incremental and absolute encoder options, please read data sheet


1.SG31-S6 + AV58-MWi-6-M12 + 84109 ... [more details]
SIKO SG31 draw wire actuated 4-20mA encoder (AV58M), plus 84109 M12 5 pin straight connector.
2.SG31-S6 + AV58-MWu-6-M12 + 84109 ... [more details]
SIKO SG31 draw wire actuated 0-10Vdc encoder (AV58M), plus 84109 M12 5 pin straight connector.