ELWECO, INC -- POTENTIOMETERS, RESOLVERS, LINEAR ANGLE POSITION Sensors, TILT Sensors, ---- All these non-contacting magnetic angle measuring sensors use the Hall Effect and have no rubbing parts to wear. Class 5 or Class 7 ball-bearings are used in Ball Bearing Models and Anodized journals are used in others. CONTACT Elweco, Inc
                          sales@hallpot.com

                                           Ph / Fx 440-254-1716

Hours 08:00 AM to 5:00 PM ---- Mon to Fri  ET

Short-Summary.pdf   - This is a summary of many versions, most of which are available.
THIS HOME PAGE is designed for engineers and technical people who quickly want information. All of the HallpotŪ products are identified then the specifications for each model or type can be selected in the first column. You immediately can see the signal response and the pictures of the HallpotŪ sensors.
Links to Specifications Response plots Pictures Model Numbers

Descriptions and Comments

This column gives the NAME of the type of HallpotŪ and the Specifications.
Click on Spec-XX.pdf to get a complete two page specification file
This column shows the response of each type of HallpotŪ over its full 360 degree of operation or of lesser calibrated angles of operation. Pictures are shown here of each model.
This shows the standard models. Special models can be seem at

Short-Summary.pdf

that shows special configurations made to fit the needs of many users.
Model Numbers are presented here for the standard models of eash type of HallpotŪ.
The ( ) is used to describe specifications tailored to user requirements such as voltage and range.
Here is a brief description of the types of applications a user may have.

Some really tough places these are used in are under pressure in ocean depths of 10,000 feet in driling rigs, in corrosive crude oil transmission lines under pressures of 1200 psi, and in the messy location under automibiles on test tracks.

POTENTIOMETERS
Linear-60.JPG (24256 bytes)

Size_75.JPG (87515 bytes)

Non-contacting magnetic

                                 POTENTIOMETERS

POTENTIOMETER MODELS

75TJ-G5C, 75TJ-G5M

   75TJ-GH-(), 75-GL-()

     75SB-G5-()

75SB-GH-(),75SB-GL-()

 

 

Size 75 HallpotŪ Potentiometers are the most commonly used configurations to control position of mechanical devices.

They use the feature that a sine wave is nearly linear over +/- 30 degrees of rotation. This angle fits the requirements of a large number of systems. They are useful over larger angles as shown in the response graphs.
Top picture shows linear region of +/- 30 degrees
Linear-90.JPG (23794 bytes)
Bottom picture shows nearly linear region of +/-45 degrees
RESOLVER

SC-Specs.pdf

S-C_Response.JPG (48976 bytes)

SC-pair-1.JPG (15868 bytes)

Non-contacting    
               Hall-effect
                       RESOLVERS
 

RESOLVER MODELS

100SB-G5C

100TJ-G5C

The sin-cos hallpotŪ produces both a sine and a cosine signal for CCW rotation. This enables decoding to be used to accurately measure and control angle over 360 degrees. Arc tan decoding produces the most temperature stable operation.
TILT SENSOR

Spec-Tilt-360x.pdf

Resp-Tilt.JPG (21730 bytes)

TiltPic.JPG (58802 bytes)

Non-contacting   
             Hall-effect
TILT ANGLE Sensors

.

 

 

 

TILT ANGLE MODELS

200SB-5V-2Pi

These TILT SENSORS produce two simultaneous linear signals over an entire range of 360 degrees. This enables the user to get the wanted slope for either direction of rotation.
LINEAR SIGNAL ANGLE POSITION

spec-2pi-2.pdf

2-Pi-response.JPG (34101 bytes)

3X-2Pi.JPG (9994 bytes)

Non-contacting magnetic Hall-effect
360 DEGREE ANGLE Sensors

 

360 DEGREE LINEAR ANGLE SENSOR

100SB-2Pi-HV

      75TJ-2Pi-5V
 
   75-SB-2Pi-HV
This is the Two-Pi linear angle sensor that measures over a full 360 degrees. All contain amplifiers that permit stable operation with various power supply voltage. They produce linear signals over a full 360 degrees.

This model eliminates the need for a lot of hardware that might be needed with resolvers, differential transformers or other types of angle sensors.

^ Links to Specifications ^ ^Response plots^ ^Pictures^ ^Model Numbers^

^Descriptions and Comments^

BRIEF HISTORY  ---- hallpotŪ angle sensors for measuring rotational angle were developed starting in 1979 by the engineer / owner of Elweco, Inc. This technology  is based on the principle discovered by Hall more than one hundred years ago. Originally, they were designed to improve the reliability and safety of joysticks used on electric wheelchairs. From this early application that required exceptional reliability and safety considerations, they evolved as angle position sensors for industrial and military equipment as a result of their reliability and repeatability.
APPLICATIONS --- hallpotŪ angle sensors are designed and built to be used in normal or severe environments where failure of the sensor must not occur. They are intended to replace resistive potentiometers, RVDTs, resolvers, and other types of rotation sensors. They may be filled with oil and used in high pressure or underwater environments. Typical systems include control of throttles, airfoils, hydrofoils, cameras, dancer loops, antennas, automobile suspensions, steering, weapons, valves, Automobile Test Dummies, or in any system that requires accurate and reliable measurement of angular rotation.  

PERFORMANCE FEATURES ---

All versions of hallpotŪ angle sensors  generate their signals by moving a magnet near a hall-effect sensor. Rotation of a magnetic field generates an electrical output signal that is an accurately controlled function of input angular position. There is no contact between the magnet and sensor such that there are no unwanted wear functions to affect the signal. Expected operational life is exceptionally long and depends only on the grade of bearings within the devices.

This link is a quick view of most standard HallpotŪ angle sensors.

CONTACT

Elweco, Inc
PO Box909
Painesville, OH 44077
PH / Fx 440-254-1716

sales@elweco.com
sales@hallpot.com
Associated Web sites
http://www.elweco.com/
http://www.resolvers.biz/
MECHANICAL CONFIGURATIONS --- hallpotŪ angle sensors are nearly identical to the mechanical configurations of existing devices such as servo-mount and resistive potentiometers. This enables them to replace the existing devices without redesign of the user's mounting configurations. Additionally, Elweco, Inc makes special configurations to fit non-standard or unusual geometry of the user.
SevEnv-hallpot.pdf--- Dimensions of standard designs

CustomVersions.pdf --- View of numerous types, customized

DimensionChart.pdf--- Brief description of severe environemtal types

ADDITIONAL INFORMATION ABOUT HALLPOTŪ ANGLE SENSORS

Information pertaining to using hallpotsŪ or decoding the Sin-Cos hallpotŪ resolver will be added as time allows and as users request.

Atan2-Decoding.xls --- This shows how the ambiguity of the arctan funtion in Excel uses Conditional Formatting to get the true angle measurement over 360 degrees.

 

hallpotŪ potentiometer, hallpotŪ  angle sensor, sin-cos hallpotŪ resolver, are the registered trademarks of Elweco, Inc