String potentiometers are composed of four main parts: a measuring cable, spool, spring, and rotational sensor.

I'm interesting in making a steering angle sensor for my Porsche track car, and this might be a good approach, in that I could attach it to the shaft on the steering rack that's attached to the tie rod. Reply 4 years ago. Dawson, I. I need something like this to be able to measure the velocity of the wire. Operationally, the transducer is mounted in a fixed position and the extension cable is attached to a moving object. If you send me a link of the encoder, I can think of specific suggestion to solve the issue. If you only need velocity, an encoder is perfect. Model - 15x Series.

Please see our data sheet for environmental and product performance details. With a core group of long standing employees, UniMeasure is dedicated to manufacturing position sensors in the USA and providing high quality solutions while further enhancing customer experience. Namespaces Article Talk. I need something like this to be able to measure the velocity of the wire. Jones, M. The inside end of the continues force spring was bent around the little screw to form a cylinder. I am comfortable reading electrical output from the rotary encoder, I'm just at a loss at how I would attach the rotary encoder to the dog leash so that it spins as it retracts.. Dawson, I. To overcome the high costs of industrial linear displacement transducers I decided to build them myself and use them in a working principle prototype.

Featured Products. Firstmark specializes in custom transducer design and realization. Since the measuring cable may sag or be deflected by wind or gravity, the overall precision of a string potentiometer measurement is limited. Csencsits, D. Thanks, I think I get it but if you have pictures that would help a ton. If you only need velocity, an encoder is perfect. UniMeasure rotary position transducers provide an analog output signal that is directly proportional to the angle of rotation of the shaft of the device. The cable mechanism limits the speed at which the measured object can move.

I'm also attempting to locate a potentiometer with a shaft that would interface with a servo wheel. Share it with us! As the transducer's cable extends along with the movable object, it causes the spool and sensor shafts to rotate. Configurable to both right and left hand pull orientations, the series transducer can be connected directly to your application or mounted to a base for easy implementation. The rotating shaft creates an electrical signal proportional to the cable's linear extension or velocity. I am comfortable reading electrical output from the rotary encoder, I'm just at a loss at how I would attach the rotary encoder to the dog leash so that it spins as it retracts.. It appears from the pictures you have a Vishay potentiometer. Good question!

I found this Vishay data sheet and this Vishay part. Please help improve this article by adding citations to reliable sources. Reply 4 years ago. With a wide variety of electrical outputs, UniMeasure linear displacement measuring and position sensor products provide an extremely cost effective method for linear position feedback. Align this sub-assembly with the holes in the aluminum tubing and insert the small screw such that it fits within the cylinder you made earlier. But I digress. Model - T - High Tension. Often referred to as string pot, yo-yo pot, draw wire transducer, cable extension transducer, cable actuated transducer, UniMeasure extending wire rope linear position transducers have proven to be an attractive approach for a multitude of applications in many different industries.

String potentiometers are composed of four main parts: a measuring cable, spool, spring, and rotational sensor. Typical use occurs in closed loop process control and in testing applications where oscillatory rotary motion occurs. This unit features an all-aluminum construction and a one of a kind, grooved drum for increased repeatability. As the transducer's cable extends along with the movable object, it causes the spool and sensor shafts to rotate. I can't find any, the only thing I can think to do is to get a retractable dog leash and take it apart. The inside end of the continues force spring was bent around the little screw to form a cylinder. Deutsch Edit links. Jones, M.

If you never worked with encoders, this will require some time getting used to. The iiMash encoder has a rod that could support axial forces and possibly shear forces, I have doubts about the cheaper one. The Corvallis facility is ISO certified with many raw materials and vendor services sourced in the local area. From Wikipedia, the free encyclopedia. Grissom, C. Firstmark specializes in custom transducer design and realization. Inside the transducer's housing, a stainless steel cable is wound on a precisely machined constant diameter cylindrical spool that turns as the measuring cable reels and unreels. Small, lightweight transducers for monitoring steering, throttle, brake and suspension position.

Reply 4 years ago. The spool is coupled to the shaft of a rotational sensor a potentiometer or rotary encoder. In case of the iiMash encoder, four holes one for the rod and three for the connecting screws. Configurable to both right and left hand pull orientations, the series transducer can be connected directly to your application or mounted to a base for easy implementation. Grissom, C. UniMeasure Rotary Position Transducers UniMeasure rotary position transducers provide an analog output signal that is directly proportional to the angle of rotation of the shaft of the device. Namespaces Article Talk. Other common names include "string pot", "cable-extension transducer", "draw wire sensor", and "yo-yo sensor".

I used the above mentioned string-pot displacement transducer as position feedback in a servo pneumatic robotics working principle prototype and they did the job perfectly. From Wikipedia, the free encyclopedia. Legendary Products Made in the USA UniMeasure Linear Position Transducers Often referred to as string pot, yo-yo pot, draw wire transducer, cable extension transducer, cable actuated transducer, UniMeasure extending wire rope linear position transducers have proven to be an attractive approach for a multitude of applications in many different industries. Did you make this project? Sub-miniature Envelope Ranges up to 6. Thanks for this instructable. Aerospace High cycle life and reliability for laboratory, flight simulator and in-flight testing. It would be awesome to have a CAD drawing made for a wheel specific to a spline shaft potentiometer. In any other case you need to search for an appropriate coupling. These subminiature units feature single turn potentiometers allowing them to maintain their narrow profile.

Dienno, M. Hidden categories: Articles needing additional references from December All articles needing additional references All articles with unsourced statements Articles with unsourced statements from August Firstmark Controls provides superior quality string position transducers for testing and OEM applications. JamesW adjuvomotion Reply 4 years ago. Model - T - High Tension. The linear displacement transducers as shown in this instructable are low cost, flexible and versatile however they do not function according any standards. Typical use occurs in closed loop process control and in testing applications where oscillatory rotary motion occurs. Chitrakaran, M. It would be awesome to have a CAD drawing made for a wheel specific to a spline shaft potentiometer.

Integral mounting provisions come standard or a versatile base can be added to simplify your implementation. Model - Series. Operationally, the transducer is mounted in a fixed position and the extension cable is attached to a moving object. The cable mechanism limits the speed at which the measured object can move. In any other case you need to search for an appropriate coupling. And now after re-reading I see that your Vishay potentiometer has the smooth shaft unlike the spline shaft that I assumed it was like this one. Dienno, M. I did it once but it broke :. Good question!

This unit features an all-aluminum construction and a one of a kind, grooved drum for increased repeatability. It looks sturdy How long is it? Since the forces applied by the reel are quite significant I definitely recommend the iiMash. In case of the iiMash encoder, four holes one for the rod and three for the connecting screws. Integral mounting provisions come standard or a versatile base can be added to simplify your implementation. Chitrakaran, M. But I digress. Firstly, drill a hole in the housing of the dog leash to connect the housing of the encoder.

Reply Upvote. Thanks, I think I get it but if you have pictures that would help a ton. Depending on your application a retractable dog leash might be perfect. Inside the transducer's housing, a stainless steel cable is wound on a precisely machined constant diameter cylindrical spool that turns as the measuring cable reels and unreels. Namespaces Article Talk. The original application for string pots in the s was aerospace cyclic fatigue testing. It appears from the pictures you have a Vishay potentiometer. I hope this helps.

Model - H - High Tension. There should be able to find some madlab or Arduino tutorials for this. The Corvallis facility is ISO certified with many raw materials and vendor services sourced in the local area. String potentiometers are composed of four main parts: a measuring cable, spool, spring, and rotational sensor. I'm just trying to source parts that will work together. Small, lightweight transducers for monitoring steering, throttle, brake and suspension position. The cable mechanism limits the speed at which the measured object can move. A string potentiometer is a transducer used to detect and measure linear position and velocity using a flexible cable and spring-loaded spool.

To maintain cable tension, a torsion spring is coupled to the spool. These position sensor devices are commonly used in applications where an absolute output signal is a must. If you never worked with encoders, this will require some time getting used to. Model - H - High Tension. The inside end of the continues force spring was bent around the little screw to form a cylinder. Align this sub-assembly with the holes in the aluminum tubing and insert the small screw such that it fits within the cylinder you made earlier. Data Sheet - 16xH High Tension. The iiMash encoder has a rod that could support axial forces and possibly shear forces, I have doubts about the cheaper one.

Fluid Control Dependable valve position sensing for automated flow rate control. Typical use occurs in closed loop process control and in testing applications where oscillatory rotary motion occurs. Inside the transducer's housing, a stainless steel cable is wound on a precisely machined constant diameter cylindrical spool that turns as the measuring cable reels and unreels. Pritts, D. Other common names include "string pot", "cable-extension transducer", "draw wire sensor", and "yo-yo sensor". Categories : Measuring instruments Resistive components Position sensors. Ranges up to Product Overview - String Pots.

And now after re-reading I see that your Vishay potentiometer has the smooth shaft unlike the spline shaft that I assumed it was like this one. About UniMeasure, Inc. Shorten your development cycle and reduce design cost by working with Firstmark's Engineered Solutions team for your custom transducer needs. With a core group of long standing employees, UniMeasure is dedicated to manufacturing position sensors in the USA and providing high quality solutions while further enhancing customer experience. The link to the dog leash is missing. Lastly Fasten the nut on the potentiometer and voila: A low cost string-pot displacement transducer. Looking forward to your next instructable! It appears from the pictures you have a Vishay potentiometer.

To overcome the high costs of industrial linear displacement transducers I decided to build them myself and use them in a working principle prototype. Often referred to as string pot, yo-yo pot, draw wire transducer, cable extension transducer, cable actuated transducer, UniMeasure extending wire rope linear position transducers have proven to be an attractive approach for a multitude of applications in many different industries. Typical use occurs in closed loop process control and in testing applications where oscillatory rotary motion occurs. Optical time-of-flight , ultrasonic, and radar transducers exist and find specialized applications. As movement occurs, the displacement cable extracts then later retracts under the power of an internal, engineered spring which also maintains tension on the displacement cable throughout its stroke. Model - T - High Tension. The company has steadily grown over the years to become a leader in the linear and rotary transducer industry with focus on customer service, innovative design and high quality products. With relatively non-critical alignment requirements, compact size, and ease of installation wire rope actuated transducers are the linear position measurement system of choice in applications as diverse as bone densitometers in the medical industry, crash testing in the automobile industry, pump jacks in the crude oil extraction industry and irrigation and flood control in the water management industry.

The iiMash encoder has a rod that could support axial forces and possibly shear forces, I have doubts about the cheaper one. I Made It! Good question! I need something like this to be able to measure the velocity of the wire. Other common names include "string pot", "cable-extension transducer", "draw wire sensor", and "yo-yo sensor". Compact sensor up to 15" travel, hall effect technology for extra long life, V output, high response rate, environmentally sealed. But I digress. Where did you get that badge reel?

Inside the transducer's housing, a stainless steel cable is wound on a precisely machined constant diameter cylindrical spool that turns as the measuring cable reels and unreels. Shorten your development cycle and reduce design cost by working with Firstmark's Engineered Solutions team for your custom transducer needs. To maintain cable tension, a torsion spring is coupled to the spool. Prototyping on a student budget is always challenging, especially when it comes to prototyping pneumatic robotics and wanting to implement linear motion feedback. In my next instructable I will show you how to build your own low cost servo valves up to 8 bar for servo pneumatic prototyping purposes. It appears from the pictures you have a Vishay potentiometer. Firstmark Controls string position transducers consist of a stainless steel displacement cable wound on a threaded drum that is directly coupled to a precision, long-life sensor. Model - T - High Tension.

Views Read Edit View history. Please see our data sheet for environmental and product performance details. In my next instructable I will show you how to build your own low cost servo valves up to 8 bar for servo pneumatic prototyping purposes. Firstmark specializes in custom transducer design and realization. JamesW adjuvomotion Reply 4 years ago. Aerospace High cycle life and reliability for laboratory, flight simulator and in-flight testing. From Wikipedia, the free encyclopedia. Download as PDF Printable version. Model - 15x Universal.

From Wikipedia, the free encyclopedia. Where did you get that badge reel? Data Sheet - 16x Series. The rotating shaft creates an electrical signal proportional to the cable's linear extension or velocity. Categories : Measuring instruments Resistive components Position sensors. The rotation of the sensor produces an electrical output proportional to the displacement cable giving indication of positional translation. As the transducer's cable extends along with the movable object, it causes the spool and sensor shafts to rotate. Would a rotary encoder work as well? Model - 15x Universal.

Namespaces Article Talk. Model - 15x Universal. Small, lightweight transducers for monitoring steering, throttle, brake and suspension position. String potentiometers are used to measure the position of a moving object. Please help improve this article by adding citations to reliable sources. Csencsits, D. Deutsch Edit links. It looks sturdy How long is it? With a core group of long standing employees, UniMeasure is dedicated to manufacturing position sensors in the USA and providing high quality solutions while further enhancing customer experience. The inside end of the continues force spring was bent around the little screw to form a cylinder.

UniMeasure, Inc. Please help improve this article by adding citations to reliable sources. Kind regards. If you only need velocity, an encoder is perfect. The linear displacement transducers as shown in this instructable are low cost, flexible and versatile however they do not function according any standards. Data Sheet - 16xH High Tension. Optical time-of-flight , ultrasonic, and radar transducers exist and find specialized applications. I am comfortable reading electrical output from the rotary encoder, I'm just at a loss at how I would attach the rotary encoder to the dog leash so that it spins as it retracts..

Where did you get that badge reel? Walker, B. Featured Products. With relatively non-critical alignment requirements, compact size, and ease of installation wire rope actuated transducers are the linear position measurement system of choice in applications as diverse as bone densitometers in the medical industry, crash testing in the automobile industry, pump jacks in the crude oil extraction industry and irrigation and flood control in the water management industry. Half Square Triangles Kinetic Art by andrei. Ranges up to Product Overview - String Pots. Configurable to both right and left hand pull orientations, the series transducer can be connected directly to your application or mounted to a base for easy implementation. Next, it might be possible to drill a press fit in the reel to connect the rod to the reel.

UniMeasure Rotary Position Transducers UniMeasure rotary position transducers provide an analog output signal that is directly proportional to the angle of rotation of the shaft of the device. Where did you get that badge reel? Measurement ranges vary from about 1 inch to over feet and are available in many appropriate package sizes. Aerospace High cycle life and reliability for laboratory, flight simulator and in-flight testing. Hydraulic cylinders are used in many industries such as forklifts , cranes and aerials, material handling, die-casting , oil and gas, robotics and automation. With relatively non-critical alignment requirements, compact size, and ease of installation wire rope actuated transducers are the linear position measurement system of choice in applications as diverse as bone densitometers in the medical industry, crash testing in the automobile industry, pump jacks in the crude oil extraction industry and irrigation and flood control in the water management industry. Sub-miniature Envelope Ranges up to 6. Categories : Measuring instruments Resistive components Position sensors. Small, lightweight transducers for monitoring steering, throttle, brake and suspension position. The rotating shaft creates an electrical signal proportional to the cable's linear extension or velocity.

Changing temperatures affect both the length of the cable and the resistance value of the potentiometer. I'm interesting in making a steering angle sensor for my Porsche track car, and this might be a good approach, in that I could attach it to the shaft on the steering rack that's attached to the tie rod. It looks sturdy How long is it? Would a rotary encoder work as well? In my case a dog leash would have been too big. I am comfortable reading electrical output from the rotary encoder, I'm just at a loss at how I would attach the rotary encoder to the dog leash so that it spins as it retracts.. JamesW adjuvomotion Reply 4 years ago. And now after re-reading I see that your Vishay potentiometer has the smooth shaft unlike the spline shaft that I assumed it was like this one.

Data Sheet - 16xH High Tension. Lastly Fasten the nut on the potentiometer and voila: A low cost string-pot displacement transducer. The iiMash encoder has a rod that could support axial forces and possibly shear forces, I have doubts about the cheaper one. Changing temperatures affect both the length of the cable and the resistance value of the potentiometer. To overcome the high costs of industrial linear displacement transducers I decided to build them myself and use them in a working principle prototype. Did you make this project? Standard Series Best linearity, indoor industrial applications, many electrical outputs, 13 measurement ranges to 80" 2m. Operationally, the transducer is mounted in a fixed position and the extension cable is attached to a moving object.

Next, it might be possible to drill a press fit in the reel to connect the rod to the reel. Align this sub-assembly with the holes in the aluminum tubing and insert the small screw such that it fits within the cylinder you made earlier. Lastly Fasten the nut on the potentiometer and voila: A low cost string-pot displacement transducer. To maintain cable tension, a torsion spring is coupled to the spool. The measurement cable can be connected directly to the moving part, giving a constant measurement of its linear position. The linear displacement transducers as shown in this instructable are low cost, flexible and versatile however they do not function according any standards. Dawson, I. In case of the iiMash encoder, four holes one for the rod and three for the connecting screws. But I digress.

Firstmark specializes in custom transducer design and realization. I found this Vishay data sheet and this Vishay part. Share it with us! Small, lightweight transducers for monitoring steering, throttle, brake and suspension position. Where did you get that badge reel? Kind regards. To maintain cable tension, a torsion spring is coupled to the spool. String potentiometers are composed of four main parts: a measuring cable, spool, spring, and rotational sensor. Reply 4 years ago.

Since the measuring cable may sag or be deflected by wind or gravity, the overall precision of a string potentiometer measurement is limited. I'm interesting in making a steering angle sensor for my Porsche track car, and this might be a good approach, in that I could attach it to the shaft on the steering rack that's attached to the tie rod. Standard Series Best linearity, indoor industrial applications, many electrical outputs, 13 measurement ranges to 80" 2m. Namespaces Article Talk. I'm just now getting into pneumatics and your Instructable will definitely help me a bunch! Share it with us! Views Read Edit View history. Featured Products.

Dawson, I. I am comfortable reading electrical output from the rotary encoder, I'm just at a loss at how I would attach the rotary encoder to the dog leash so that it spins as it retracts.. Next, remove the screw and position the spring inside the reel. I did it once but it broke : 2. The company has steadily grown over the years to become a leader in the linear and rotary transducer industry with focus on customer service, innovative design and high quality products. I'm just trying to source parts that will work together. Small, lightweight transducers for monitoring steering, throttle, brake and suspension position. The spool is coupled to the shaft of a rotational sensor a potentiometer or rotary encoder.

It looks sturdy How long is it? Good question! In any other case you need to search for an appropriate coupling. McMahan, V. Optical time-of-flight , ultrasonic, and radar transducers exist and find specialized applications. Sub-miniature Envelope Ranges up to 1. Model - T - High Tension. Did you make this project?

If you never worked with encoders, this will require some time getting used to. Inside the transducer's housing, a stainless steel cable is wound on a precisely machined constant diameter cylindrical spool that turns as the measuring cable reels and unreels. The Corvallis facility is ISO certified with many raw materials and vendor services sourced in the local area. Model - Series. I need something like this to be able to measure the velocity of the wire. I'm interesting in making a steering angle sensor for my Porsche track car, and this might be a good approach, in that I could attach it to the shaft on the steering rack that's attached to the tie rod. In my next instructable I will show you how to build your own low cost servo valves up to 8 bar for servo pneumatic prototyping purposes. In case of the iiMash encoder, four holes one for the rod and three for the connecting screws. Firstmark Controls string position transducers consist of a stainless steel displacement cable wound on a threaded drum that is directly coupled to a precision, long-life sensor.

The spool is coupled to the shaft of a rotational sensor a potentiometer or rotary encoder. About UniMeasure, Inc. Firstmark specializes in custom transducer design and realization. Since the forces applied by the reel are quite significant I definitely recommend the iiMash. Jones, M. The potentiometer in that pic has a smooth shaft. With a wide variety of electrical outputs, UniMeasure linear displacement measuring and position sensor products provide an extremely cost effective method for linear position feedback. UniMeasure absolute analog rotary position transducers have proven to be an extremely cost effective alternative for measuring rotational positioning. Two spring options accommodate accelerations up to 49g.

Grissom, C. Integral mounting provisions come standard or a versatile base can be added to simplify your implementation. Reply 5 years ago on Introduction. Any references you can provide will be much appreciated. Depending on your application a retractable dog leash might be perfect. It looks sturdy How long is it? Firstmark Controls provides superior quality string position transducers for testing and OEM applications. Inside the transducer's housing, a stainless steel cable is wound on a precisely machined constant diameter cylindrical spool that turns as the measuring cable reels and unreels. In my next instructable I will show you how to build your own low cost servo valves up to 8 bar for servo pneumatic prototyping purposes.

Standard Series Best linearity, indoor industrial applications, many electrical outputs, 13 measurement ranges to 80" 2m. To maintain cable tension, a torsion spring is coupled to the spool. Data Sheet - 16xH High Tension. Dawson, I. Jones, M. Fluid Control Dependable valve position sensing for automated flow rate control. About UniMeasure, Inc. The potentiometer in that pic has a smooth shaft.

I'm just now getting into pneumatics and your Instructable will definitely help me a bunch! Thanks, I think I get it but if you have pictures that would help a ton. Deutsch Edit links. Csencsits, D. About UniMeasure, Inc. The inside end of the continues force spring was bent around the little screw to form a cylinder. In any case i will update this instructable to include this part. Shorten your development cycle and reduce design cost by working with Firstmark's Engineered Solutions team for your custom transducer needs. I can't find any, the only thing I can think to do is to get a retractable dog leash and take it apart.

In my case a dog leash would have been too big. Legendary Products Made in the USA UniMeasure Linear Position Transducers Often referred to as string pot, yo-yo pot, draw wire transducer, cable extension transducer, cable actuated transducer, UniMeasure extending wire rope linear position transducers have proven to be an attractive approach for a multitude of applications in many different industries. Pritts, D. Optical time-of-flight , ultrasonic, and radar transducers exist and find specialized applications. Product Overview - String Pots. Views Read Edit View history. Inside the transducer's housing, a stainless steel cable is wound on a precisely machined constant diameter cylindrical spool that turns as the measuring cable reels and unreels. Model - H - High Tension. I can't find any, the only thing I can think to do is to get a retractable dog leash and take it apart.

Note that the Newark site calls out that the picture is NOT of the actual part. The potentiometer in that pic has a smooth shaft. Data Sheet - Series. Categories : Measuring instruments Resistive components Position sensors. I'm just now getting into pneumatics and your Instructable will definitely help me a bunch! If you send me a link of the encoder, I can think of specific suggestion to solve the issue. Jones, M. It looks sturdy How long is it? About UniMeasure, Inc. I used the above mentioned string-pot displacement transducer as position feedback in a servo pneumatic robotics working principle prototype and they did the job perfectly.

Align this sub-assembly with the holes in the aluminum tubing and insert the small screw such that it fits within the cylinder you made earlier. Best linearity, indoor industrial applications, many electrical outputs, 13 measurement ranges to 80" 2m. In any case i will update this instructable to include this part. Thanks for this instructable. Namespaces Article Talk. Would a rotary encoder work as well? Reply 4 years ago. Please help improve this article by adding citations to reliable sources. The potentiometer in that pic has a smooth shaft.

Integral mounting provisions come standard or a versatile base can be added to simplify your implementation. Firstly, drill a hole in the housing of the dog leash to connect the housing of the encoder. Small, lightweight transducers for monitoring steering, throttle, brake and suspension position. Measurement ranges vary from about 1 inch to over feet and are available in many appropriate package sizes. With a proven legacy in the aviation, automotive, medical, space and general industry sectors, our rugged products have been serving the demanding needs of our customers since the s. Download as PDF Printable version. I'm also attempting to locate a potentiometer with a shaft that would interface with a servo wheel. The measurement cable can be connected directly to the moving part, giving a constant measurement of its linear position. Additional stuff: Glue, Drill, Drilling machine, metal saw, the nut comes with the potentiometer.

These subminiature units feature single turn potentiometers allowing them to maintain their narrow profile. Data Sheet - 16xH High Tension. Categories : Measuring instruments Resistive components Position sensors. Download as PDF Printable version. Product Overview - String Pots. Namespaces Article Talk. McMahan, V. Firstmark specializes in custom transducer design and realization. Pritts, D.

JamesW adjuvomotion Reply 4 years ago. Typical use occurs in closed loop process control and in testing applications where oscillatory rotary motion occurs. Since the forces applied by the reel are quite significant I definitely recommend the iiMash. Additional stuff: Glue, Drill, Drilling machine, metal saw, the nut comes with the potentiometer. Changing temperatures affect both the length of the cable and the resistance value of the potentiometer. Note that the Newark site calls out that the picture is NOT of the actual part. In case of the iiMash encoder, four holes one for the rod and three for the connecting screws. The original application for string pots in the s was aerospace cyclic fatigue testing.

I'm just now getting into pneumatics and your Instructable will definitely help me a bunch! I need something like this to be able to measure the velocity of the wire. Well, that really depends on the encoder you use. Help Learn to edit Community portal Recent changes Upload file. Please help improve this article by adding citations to reliable sources. JamesW 4 years ago. I did it once but it broke :. With a core group of long standing employees, UniMeasure is dedicated to manufacturing position sensors in the USA and providing high quality solutions while further enhancing customer experience. With a proven legacy in the aviation, automotive, medical, space and general industry sectors, our rugged products have been serving the demanding needs of our customers since the s. String potentiometers are used to measure the position of a moving object.