R120LC – DC Oper ate d Low Cost RVIT
R120LC Rev. 4 www.meas-spec.com 2015-July
1/3
• Low cost
• 5VDC supply voltage
• 0 to 120 degree sensing range
• Non-contact electrical design
• ¼ inch shaft diameter
• Ratiometric output
• No wear potentiometer replacement
• Light weight
DESCRIPTION
The R120LC RVIT (Rotary Variable Inductance Transducer) is a cost efficient, DC operated non-contact angular
position sens or. It provid es a smooth 0.5 to 4.5VD C output , ratiometr ic to the suppl y voltag e and proport ional 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 uti lizes a set of four printed circ uit coils and a light-weight c onductive s poiler 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
unbalanc e is precise ly measured us ing a patented autopl ex circuit. T his signal is then con verted to a l inear DC
output volt age pr oport io nal to the ang le of the r o tor shaft. T he digit al circuit provi d es r es istanc e to environmental
disturbances such as EMI and RFI, and is ideally suited to the most rigorous indus tr ial appl ic ations .
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 ope rated, angular pos ition sensor models, RVIT-15 Series (single ended DC operation,
voltage or current output), R60D (bipolar DC operation), and the R30D (DC operated RVDT).
Measurement Specialties, Inc. (NASDAQ MEAS) offers many other types of sensors and signal conditioners.
Data sheets can be downloaded from our web site at: http://www.meas-spec.com/datasheets.aspx
MEAS acquired Schaevitz Sensors and the SchaevitzTM trademark in 2000.
FEATURES APPLICATIONS
• Precision ball bearings
• Valve position
• Infinite resolution
• Fly-by-wire joy-stick position feedback
• Low moment of inertia
• General aviation stall warning sensor
• Long term reliability
• Potentiometer replacement
• Wide operating temperature range
R120LC – DC Operate d Low Cost RVIT
R120LC Rev. 4 www.meas-spec.com 2015-July
2/3
PERFORMANCE SPECIFICATIONS
ELECT RI CAL SPECIF ICATIONS
Input voltage
5±0.25 VDC
Input current
21mA maximum
Angular range
0 to 120 degree
Non-linearity
±0.5% of FSO
Output at range ends
+0.5 to +4.5 VDC (ratiometric to input voltage)
Sensitivity
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
-13°F to +185°F [-25°C to 85°C]
Storage temperature range
-67°F to +257°F [-55°C to 125°C]
Mechanical angular range
360 degrees (no stops)
Bearings
ABEC 3 precision
Shaft diameter
¼ i nch [6.3mm]
Torque
0.12 inch.ounce-force [8.6 gram-force.cm]
Weight
1.2oz [34gm]
Electrical connection
4 lead wires, 28 AWG , PTFE insulation, 12 inches [30cm] long
IEC 60529 rating
IP60
Notes:
All values are nominal unless otherwise noted
FSO (Full Scale Output): Largest absolute value of the outputs measured at the ends of the range
FRO (Full Range Output): Algebraic difference in outputs measured at the ends of the range
DIMENSIONS
Dimensions are in inch (mm)
R120LC – DC Operate d Low Cost RVIT
R120LC Rev. 4 www.meas-spec.com 2015-July
3/3
WIRING INFORMATION
ORDERING INFORMATION
Description Model Part Number
RVIT 0-120º
R120LC
02183000-000
Refer to our “RVDT and RVIT Accessories” brochure for our RVDT accessories.
TECHNICAL CONTACT INFORMATION
NORTH AMERICA
EUROPE
ASIA
Measurement Specialties, Inc.
1000 Lucas Way
Hampton, VA 23666
United States
Phone: +1-800-745-8008
Fax: +1-757-766-4297
Email: sales@meas-spec.com
Web: www.meas-spec.com
MEAS Deutschland GmbH
Hauert 13
D-44227 Dortmund
Germany
Phone: +49-(0)231-9740-0
Fax: +49-(0)231-9740-20
Email: info.de@meas-spec.com
Web: www.meas-spec.com
Measurement Specialties China Ltd.
No. 26, Langshan Road
High-tech Park (North)
Nanshan District, Shenzhen 518057
China
Phone: +86-755-33305088
Fax: +86-755-33305099
Email: info.cn@meas-spec.com
Web: www.meas-spec.com
The information in this sheet has been carefully reviewed and is believed to be accurate; however, no responsibility is assumed for
inaccuracies. Furthermore, this information does not convey to the purchaser of such devices any license under the patent rights to the
manufacturer. Measurem ent Specialt ies, I nc. reser ves the ri ght to mak e changes without furt her notic e to any produc t herein. Measurement
Specialti es, Inc. makes no warran ty, represent ation or guarantee re garding the suit ability of its product f or any partic ular purpos e, nor does
Measurement Specialties, Inc. assume any liability arising out of the application or use of any product or circuit and specifically disclaims
any and all liability, including without limitation consequential or incidental damages. Typical parameters can and do vary in different
applications. All operating parameters must be validated for each customer application by customer’s technical experts. Measurement
Specialti es, Inc. does not convey any lic ense under its patent rights nor the rights of others.
