MagnetoPot Linear Potentiometer - 50mm (Male Pins)

SKU: SEN-27312 Brand: Sparkfun

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...

Special Price $45.54 AUD, inc GST

Regular Price $56.67 AUD, inc GST

$41.40 AUD, exc GST

Special pricing ends 02 July 2025

* this special may end earlier than shown

Available with a lead time
Expect dispatch between Apr 08 and Apr 11

Product Overview

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.

Features & Specs

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*
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).

*Please note that the hysteresis is directly affected by the drive magnet size, strength, and distance from the internal magnet.

Documentation

Datasheet

This product is listed in:

Components & Parts>Potentiometers>Sliding
Sensors>Soft Potentiometers

Product Comments

Start the conversation

Exact shipping can be calculated on the view cart page (no login required).

Products that weigh more than 0.5 KG may cost more than what's shown (for example, test equipment, machines, >500mL liquids, etc).

We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):

$3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
$7+ for Standard Post (typically 6+ business days, tracked)
$11+ for Express Post (typically 2+ business days, tracked)
Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.

Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.

Some batteries (such as LiPo) can't be shipped by Air. During checkout, Express Post and International Methods will not be an option if you have that type of battery in your shopping cart.

International Orders - the following rates are for New Zealand and will vary for other countries:

$12+ for Pack and Track (3+ days, tracked)
$16+ for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount will increase based on the weight of your order.

Our physical address (here's a PDF which includes other key business details):

Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.

Have a product question? We're here to help!