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Features
- Linear Position Sensor - IP65 Dust Proof, Water Proof (Intense Spray) - Polyester Substrate - 3M Pressure Sensitive Adhesive (PSA) - Upon Request - Male or Female Nicomatic or Berg Connectors - Wiper of 1-3 Newton Force to Actuate Part - Higher Temperature and/or Contactless Options Available
Mechanical Specifications
-Life Cycle: >1 million -Height: 0.51mm (0.020") -Actuation Force (with a 10mm wide active cavity): -40C 0.8 to 1.8 N -25C 0.8 to 1.8 N +23C 0.6 to 1.5 N +50C 0.6 to 1.5 N
Electrical Specifications
-Resistance - Standard: 10k Ohms (lengths >300mm = 20k Ohms) -Resistance - Custom: 1k to 100k Ohms -Resistance Tolerance: 20% -Effective Electrical Travel: 8 to 2000mm -Linearity (Independent): Linear 1% & 3% Rotary 3% & 5% -Repeatability: No hysteresis, but with any wiper looseness some hysteresis will occur -Power Rating (depending on size, varies with length and temperature): 1 Watt max. @ 25C, 0.5 Watt recommended -Resolution: Analog output theoretically infinite; affected by variation of contact wiper surface area. -Dielectric Value: No affect @ 500VAC for 1 minute
Environmental Specifications
-Operating Temperature: -40C to +50C -Humidity: No affect @ 95% RH, 4hrs 50C -IP Rating of Active Area: IP65
Dimensional Diagram - Stock Linear SoftPot
PART LENGTH [P] ACTIVE LENGTH [A] 10.16 [0.400] TAIL WIDTH
PIN 1
20.32 [0.800] 7.11 [0.280] ACTIVE WIDTH
12.50mm 0.492"
28.36mm 1.117"
6.60 [0.260] TAIL LENGTH [T] 7.93 [0.312]
A P T
25.00mm 0.984"
40.86mm 1.609"
50.00mm 100.00mm 150.00mm 170.00mm 200.00mm 300.00mm 400.00mm 500.00mm 750.00mm 1000.00mm 6.693" 29.528" 39.370" 1.969" 3.937" 5.906" 7.874" 11.811" 15.748" 19.685"
65.86mm 2.593" 115.86mm 4.562" 165.86mm 6.531" 185.86mm 7.318" 215.86mm 8.499" 315.86mm 12.436" 415.86mm 16.373" 515.86mm 20.310" 765.86mm 30.153" 1015.86mm 39.995"
12.70mm 0.500"
24.89mm 0.980"
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Electrical Schematic
PIN 3 (GND)
(LEFT BUS BAR)
Material Cross-Section
0.41 [0.016] CIRCUIT 0.05 [0.002] 3M 200MP ADHESIVE 0.46 [0.018] TOTAL THICKNESS
PIN 2
(COLLECTOR)
PIN 1 (V+)
10K or 20K
(RIGHT BUS BAR)
How to Order - Linear SoftPots
SP Series
SP = SoftPot
L Model
L = Linear
0050 Active Length
0012 = 12,5mm 0025 = 25mm 0050 = 50mm 0100 = 100mm 0150 = 150mm 0170 = 170mm 0200 = 200mm 0300 = 300mm 0400 = 400mm 0500 = 500mm 0750 = 750mm 1000 = 1000mm
103 Resistance
Active Lengths < 300mm
3%
ST Connectors
103 = 10 KOhm
Active Lengths > 300mm
203 = 20 KOhm
ST = Solder Tab MP = Male Pins RH = Receptacles w/Plain Housing RL = Receptacles w/Latch Housing RD = Receptacles w/Detent Housing B = FCI/Berg Clincher
Ind. Linearity
1% = 1% 3% = 3%
Standard Connector Options
Crimpflex Solder Tab (ST)
Crimpflex Short Male Pins (MP)
Crimpflex Female Receptacles with a Plain Housing (RH)
Crimpflex Female Receptacles with a Latch Housing (RL)
Crimpflex Female Receptacles with a Detent Housing (RD)
FCI/Berg Clincher (B)
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Customization
Customize the size, shape, and even the number of tracks. Such custom requests, for example, can be: multiple ganged sensors (up to 40 tracks); serpentine active area track; custom lengths 10mm-2000mm; custom rotary diameters, etc. Feel free to contact Spectra Symbol with your custom request at sales@spectrasymbol.com or (888)795-2283..
How It Works
In simple terms, the SoftPot membrane potentiometer is a resistive element, which comprises a conductive resistor, a sealed encasement and a simple wiper assembly. A membrane potentiometer can also function as a voltage divider. The SoftPot is a three-wire system with two resistive output channels and an electrical collector channel.
Top Circuit (Collector)
Circuit Spacer
Bottom Circuit (Resistor)
Bottom Adhesive
By pressing a wiper down onto the top circuit the SoftPot produces the desired electrical output. The "wiper" is a non-conductive mechanism that depresses the top circuit actuating the potentiometer from the outside of the element. The top and bottom circuits are separated by 0.15mm (0.006") of spacer adhesive build-up and contact between the circuit occurs by pressure (usually 1-3 Newtons) from the wiper on the top circuit, pushing down until the top circuit connects with the bottom circuit to create a potentiometric output.
The construction of the wiper design can adapt to any application because most materials can serve as the wiper: plastics, metals, sliders, rollers, wheels, etc. Also, the SoftPot can also be manually (hand) actuated.
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Wiper
Typical wiper materials are delrin, plastic injection molded products, metal rollers with back-loaded springs, sliders attached to lead-screws, etc. With small quantities, an off-the-shelf solution might be easier, while with higher quantities or space limitations a custom wiper may be required. The stock 1-3 Newton wiper is an excellent product for most applications. In case of unique applications, extreme environment or cycle needs, it is recommended to seek the advice of the Spectra Symbol Design Department. The selection of the correct wiper (material, form) can affect the life cycle and electrical output of the SoftPot.
Stock Wiper
Mechanical Specifications
-Minimum Force: 1 Newton -Maximum Force: 3 Newtons -Tip Material: Delrin -Thread Pitch: M1.0 (1mm)
Dimensional Diagram
6.00 [0.236] 1.00 [0.039]
14.00 [0.551] 16.00 [0.629]
O2.70 [O0.106]
How to Order - Stock Wiper
WP Series
WP = Wiper
M1 Thread Pitch
M1 = M1.0
01
Min. Force
01 = 1 Newton
03 Max. Force
03 = 3 Newtons
014 Threaded Body Length
014 = 14mm
DI Tip Material
DI = Delrin
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Diagram - Stock Rotary SoftPot
10.01 [0.394] ACTIVE WIDTH O25.40 [O1.000] THRU HOLE
O65.74 [O2.588] OUTSIDE PERIMETER
O45.57 [O1.794] (CENTER OF TRACK) 353 ACTIVE ANGLE 10.16 [0.400] PIN 1
5.08 [0.200] 5.08 [0.200]
111.88 [4.405]
Electrical Schematic
PIN 3 (GND)
(LEFT BUS BAR)
Material Cross-Section
0.41 [0.016] CIRCUIT 0.05 [0.002] 3M 200MP ADHESIVE 0.46 [0.018] TOTAL THICKNESS
PIN 2
(COLLECTOR)
PIN 1 (V+)
10K
(RIGHT BUS BAR)
How to Order - Rotary SoftPot
SP Series
SP = SoftPot
R Model
R = Rotary
0046
Center of Active Track 0046 = 45.57mm
0353 Active Angle
0353 = 353
103 Resistance
103 = 10 KOhm
5%
ST Connectors
Ind. Linearity
3% = 3% 5% = 5%
ST = Soldertab MP = Male Pins RH = Receptacles w/Plain Housing RL = Receptacles w/Latch Housing RD = Receptacles w/Detent Housing B = FCI/Berg Clincher
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