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Home » Products » Rotary and Tilt Sensors » DC RVDT » DC Operated Low Cost RVIT

DC Operated Low Cost RVIT

DC Operated Low Cost RVIT
DC Operated Low Cost RVIT
Product Code : R120LC
Product Description

The R120LC RVIT (Rotary Variable Inductance Transducer) is a cost efficient, DC operated non-contact angular position sensor. It provides a smooth 0.5 to 4.5VDC output, ratiometric to the supply voltage and proportional to angular position over the 120 degree sensing range. The R120LC utilizes non-contacting, differential inductive technology, and does not suffer the wear problems experienced by potentiometers.

The R120LC proprietary design utilizes a set of four printed circuit coils and a light-weight conductive spoiler to achieve superior performance with a low moment of inertia. During operation, the light weight spoiler rotates with the transducer shaft, differentially altering the inductance of the printed circuit planar coils. The resulting unbalance is precisely measured using a patented autoplex circuit. This signal is then converted to a linear DC output voltage proportional to the angle of the rotor shaft. The digital circuit provides resistance to environmental disturbances such as EMI and RFI, and is ideally suited to the most rigorous industrial applications.

Calibrated over the full 120 degree sensing range, the R120LC offers exceptional performance at a cost effective price. It also features a wide operating temperature range, infinite resolution, and an extremely long rotational cycle life.

Also see our other DC operated, angular position sensor models, RVIT-15 Series (single ended DC operation, voltage or current output), R60D (bipolar DC operation), and the R30D (DC operated RVDT).

Details :

  • Low cost
  • 5VDC supply voltage
  • 0 to 120 degree sensing range
  • Non-contact design
  • 1/4 inch shaft diameter
  • Ratiometric output
  • No wear potentiometer replacement
  • Light weight

Features :

  • Precision ball bearings
  • Infinite resolution
  • Low moment of inertia
  • Long term reliability
  • Wide operating temperature range

Application :

  • Valve position
  • Fly-by-wire joy-stick position feedback
  • General aviation stall warning sensor
  • Potentiometer replacement

Electrical Specifications :

Input voltage

5+0.25 VDC

Input current

21mA maximum

Angular range

0 to 120 degree


+0.5% of FSO

Output at range ends

+0.5 to +4.5 VDC (ratiometric to input voltage)


6.67mV/V/degree (ratiometric to input voltage)

Temp coefficient of output

+0.02% of FSO per oF [0.03% of FSO per oC], over operating temperature range

Output current

5mA maximum

Output impedance

1Ω maximum

Non-repeatability and hysteresis

0.1% of FRO maximum

Frequency response

200 HZ @ -3 dB

Environmental And Mechanical Specifications :

Operating temperature range

-13oF to +185oF [-25oC to 85oC]

Storage temperature range

-67oF to +257oF [-55oC to 125oC]

Mechanical angular range

360 degrees (no stops)


ABEC 3 precision

Shaft diameter

1/4 inch [6.3mm]


0.12 inch.ounce-force [8.6]


1.2oz [34gm]

Electrical connection

4 lead wires, 28 AWG , PTFE insulation, 12 inches [30cm] long


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