1-TURN CONTACTLESS POTENTIOMETER（Hall effect IC type）▼1-Turn▼
Contactless type

SAKAE Contactless potentiometers using hall effect IC are low-cost types with high performance which was researchedand developed based on our experience of contactless inductance type potentiometers. Hall effect IC itself has ever beenused in many kinds of our joystick controllers. We have established great trust with many users and achieved satisfactory
performance.
To meet with a request for potentiometer type, we studied unique circuit configuration and inner construction. As a result ofour study, we have finally completed producing a high-performance product with EMS tolerance. The Contactlesspotentiometer has very long life expectancy and excellent resistance to vibration due to its contactless element, which canmeet many types of applications in different industrial field.

THE NOMENCLATURE OF SAKAE 1-TURN CONTACTLESS POT. SERIES

S HSM

18E

P 12 - ○○○○○● 4 or 5 digits branch number
to be used for specificrequirements.
● Applied Voltage
None: 5V (Standard)● Special Specification

S means the potentiometer withspecial mechanical specifications.

Hall effect IC

12:12V (HSM22 and 30 are only available as an option.)
24:24V (HSM22 and 30 are only available as an option.)● Type
HSM means Hall effect IC type of
1-turn contactless potentiometer.
● Dimensions
18 means the approximate outer diameterof the potentiometer in metric system. The
4 standard diameters are available, namely,12mm, 18mm, 22mm and 30mm.

● Dual output (Available in HSM18, 22, and 30)
P means parallel output. X means cross output. Nonemeans single output (standard)● Dual independent output (Available only in
HSM22 and 30)WP means dual independent parallel output
WX means dual independent cross output● TypeE means lug terminal type for HSM18
EL means leadwire type for HSM18
F means flange type for HSM30(Except for the above types, no character shows.)● Leadwire (terminal) Connection Diagram● Construction and Output Voltage

Construction
Semicylinder permanent magnet is joined to shaft. The magnet rotates andpasses near Hall effect IC installed in circuit board as per the below diagram.

IN 5V (Red)OUT A (White)

Shaft stays at the neutral position.(2.5V output)OUT B (Blue)
Hall ICGND (Black)

MagnetMagnetic field(Magnetic flux)

S

MagnetNVoltage

Note: Above colors means the colors of the leadwires

Current
Shaft rotates itself by + 45°(4.5V output)

Diagram froma side view

● Output Characteristics
100%

OUT A
（OUT B In case ofa parallel output）

90%

Output Voltage

50%

10%
0%

108

CenterEffective Electrical Angle±45°（OUT B in case ofa cross output）

Rotating Angle→CWS

MagnetN+ Rotation

Output Voltage
In the case shaft stays at the neutral position, the distance between S poleand Hall effect IC is the same as that between N pole and Hall effect IC.
Therefore, magnetic fields of S pole and N pole get balanced out and Hall IC
does not have an effect on magnetic fields, namely, 0(Zero) magnetic field.
In this condition, the output voltage of Hall effect IC is set to 2.5V.
In the case shaft rotates in the direction of plus, Hall effect IC gradually has
more effect on magnetic field from S pole depending on the rotation angle.
Due to this, the output voltage increases and turns around 4.5V at + 45°(incase of HSM18E). While, rotating in the direction of minus, Hall effect IC has
more effect on magnetic field from N pole, then the output voltage
decreases and turns around 0.5V at -45°
. Therefore, Hall effect IC output
gets around 0.5 V to 4.5V between ±45°in proportion to the rotation angle.