Features
- Contactless Linear Sensor
- IP64 Debris Proof, Splash Proof
- Ideal for Hydraulic and Pneumatic Position
Sensing
- Liquid Level Capability
- Upon request
- Male or Female Nicomatic Connectors
- Corresponding Exterior Magnet
Mechanical Specifications
-Life Cycle: >1 million
-Height: 3.50mm (0.138")
-Actuation Force: 0.09 to 0.11 lbs pull force at
desired distance (pull force rating is for the
exterior magnet using a test plate of cold rolled
steel).
Electrical Specifications
-Resistance - Standard: 10k Ohms
(lengths >300mm = 20k Ohms)
-Resistance - Custom: 5k to 500k Ohms
-Resistance Tolerance: ±20%
-Effective Electrical Travel: 8 to 1200mm
-Resolution: Depends on the exterior magnet
strength and distance to the MagnetoPot
-Power Rating: 0.50 Watt continuous, 1 Watt Peak
-Dielectric Value: No affect @ 500VAC for 1
minute
-Independant Linearity: ±5% (±1% available)
-Hysteresis: 3mm*
*Please note
that the hysteresis is directly affected
by the drive magnet size, strength, and distance
from the internal magnet.
Environmental Specifications
-Operating Temperature: up to +85°C
-IP Rating of Active Area: IP64
Dimensional Diagram - Stock Linear MagnetoPots
PART LENGTH [P]
ACTIVE LENGTH [A]
10.16 [0.400]
TAIL WIDTH
PIN 1
20.32 [0.800]
3.81 [0.150]
ACTIVE WIDTH
12.50mm
0.492"
28.36mm
1.117"
8.24 [0.325]
TAIL LENGTH [T]
7.93 [0.312]
A
P
T
25.00mm
0.984"
40.86mm
1.609"
50.00mm 100.00mm 150.00mm 171.89mm 200.00mm 300.00mm 400.00mm 500.00mm 750.00mm 1000.00mm
6.768"
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
3.28 [0.129] CIRCUIT
0.05 [0.002] 3M ADHESIVE
3.33 [0.131] TOTAL (±10%)
10K
PIN 2 (V+)
(RIGHT BUS BAR)
PIN 1
(COLLECTOR)
How to Order - MagnetoPots
MP1
Series
MP1 = MagnetoPot
L
Model
L = Linear
0050
Active Length
0012 = 12,5mm
0025 = 25mm
0050 = 50mm
0100 = 100mm
0150 = 150mm
0172 = 172mm
0200 = 200mm
0300 = 300mm
0400 = 400mm
0500 = 500mm
0750 = 750mm
1000 = 1000mm
103
Resistance
Active Lengths < 300mm
5%
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
* Please note that the RL and RD style
connectors are only available in one
orientation. Please contact Spectra Symbol
for more infomation.
Ind. Linearity
5% = ±5%
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)
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Customization
Customize the size and shape. Such custom requests, for example, can be: custom lengths 10mm-1200mm;
custom rotary diameters, etc. Spectra Symbol would be glad to quote your custom application, just contact us at
sales@spectrasymbol.com or (888)795-2283.
How It Works
The MagnetoPot is simple, yet elegant in its ability to track motion in a contactless manner. A magnet on the
inside of a cylinder, or a magnet on the opposing side of a motion device will guide the built-in magnetics of the
MagnetoPot for position location through a potentiometric output.
The MagnetoPot is a sealed potentiometer, in the membrane potentiometer tradition, yet it does not require a
wiper/actuator to connect the collector and the resistor. Instead, the MagnetoPot is controlled by an outside
magnet, which attracts the magnetic forces within the MagnetoPot to connect to the linear resistor and give linear
potentiometer feedback.
The wiper inside the sealed pot is magnetic or ferromagnetic, and will only perform if connected with an exterior
magnet.
As opposed to a magnetically-based Reed Switch, which gives simply “open” or “close” signals, the MagnetoPot
gives the full linear travel of a hydraulic or pneumatic cylinder.
In liquid level applications, the MagnetoPot can attach to the outside of a liquid tank and give position of the
magnet inside the float. No water ingress, no wearing of the part by environment, because the MagnetoPot is
outside of the tank.
Design and Contruction
The MagnetoPot is made of polyester, fiberglass and kapton, depending on the specification required. It functions
as a voltage divider, a resistor or rheostat, as desired by the end-user. By bringing the exterior magnet into a
proximity necessary to connect with the internal magnetic attractors, the operator can obtain linear position
sensing based on the location of the exterior magnet. As the exterior magnet moves, so does the electrical output
of the MagnetoPot.
The MagnetoPot should not be mounted to a ferromagnetic surface.
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Diagram - Stock Rotary MagnetoPot
R32.87 [R1.294]
OUTER DIAMETER
R12.70 [R0.500]
THRU
Ø45.57 [Ø1.794]
CENTER OF TRACK
2xR1.59 [R0.062]
4.83 [0.190]
ACTIVE WIDTH
353°
ACTIVE
ANGLE
10.16 [0.400]
PIN 1
6.08 [0.239]
(TYP)
79.01 [3.111]
Electrical Schematic
PIN 3 (GND)
(LEFT BUS BAR)
Material Cross-Section
3.28 [0.129] CIRCUIT
0.05 [0.002] 3M ADHESIVE
3.33 [0.131] TOTAL (±10%)
PIN 2
(COLLECTOR)
PIN 1 (V+)
10K
(RIGHT BUS BAR)
How to Order - Rotary MagnetoPot
MP1
Series
MP1 = MagnetoPot
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
5% = ±5%
ST = Solder Tab
MP = Male Pins
RH = Receptacles w/Plain Housing
RL = Receptacles w/Latch Housing
RD = Receptacles w/Detent Housing
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