Rheostat Dials

Rheostat dials are a component of rheostats, a type of two-terminal variable resistormade up of one end contact and a wiper. The dials are used to display the degree of change in resistance that is made when a user turns the rheostat knob.

How do rheostats work?

Rheostats are a common way to vary the resistance in a circuit. They are now often referred to by the more general term potentiometer. A user turns a rheostat knob to point to a given number on the dial, which alters the resistance of the device. Higher power rheostats use a wire wound around an insulator, and the resistance changes depending on where on the wire the wiper is positioned.

Types of rheostat dials

Rheostat dials differ depending on their function. Some are simply a kind of flat panel display engraved with numbers, while others have a protruding dial with numbers on it, designed to be used with a shaft.


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Description Price Accessory Type For Use With Inner Diameter
RS Stock No. 788-5189
Mfr. Part No.ACCRFCADRANCG78
BrandVishay
HK$188.65
Each
units
Panel Dial Rheostat 78mm
RS Stock No. 167-9915
Mfr. Part No.ACCRFCADRANCG78
BrandVishay
HK$188.65
Each (In a Pack of 5)
units
Panel Dial Rheostat 78mm
RS Stock No. 137-4576
Mfr. Part No.A 60 16 019
BrandOKW
HK$21.69
Each
units
- - -
RS Stock No. 167-9904
Mfr. Part No.ACCRFCADRANCG57
BrandVishay
HK$161.19
Each (In a Pack of 5)
units
Dial - 56mm
RS Stock No. 788-5170
Mfr. Part No.ACCRFCADRANCG57
BrandVishay
HK$161.19
Each
units
Dial - 56mm
RS Stock No. 788-5176
Mfr. Part No.ACCRFCADRANCG115
BrandVishay
HK$202.50
Each
units
Dial - 115mm
RS Stock No. 167-9902
Mfr. Part No.ACCRFCADRANCG45
BrandVishay
HK$175.498
Each (In a Pack of 5)
units
Dial - 45mm
RS Stock No. 144-2203
Mfr. Part No.2696
HK$75.61
Each
units
Turns Counting Dial 1/4 in Shaft 10.3mm
RS Stock No. 144-2052
Mfr. Part No.2696
HK$71.651
Each (In a Box of 20)
units
Turns Counting Dial 1/4 in Shaft 10.3mm
RS Stock No. 788-5132
Mfr. Part No.ACCRFCADRANCG45
BrandVishay
HK$152.00
Each
units
Dial - 45mm
RS Stock No. 2508972852
Mfr. Part No.15-1-11
BrandVishay
HK$333.76
Each
units
- - -
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