No Bearing Encoders : Discover Netzer's VLX-25 Rotary Encoders

VLX-25

The Netzer VLX-25 Absolute Rotary Encoder is an ultra-compact (<7 mm thin) and ultra-lightweight (<4g) solution, delivering up to 21-bit resolution with 0.025 Degree accuracy. Designed for tight-space applications, this miniature rotary encoder provides high-precision, contactless capacitive sensing technology for wear-free, long-term reliability in demanding motion control systems.

Perfect for aerospace, robotics, medical devices, and compact industrial automation, the VLX-25’s ultra-small, hollow, low-inertia design minimizes system weight while maximizing performance. When size constraints demand the smallest, most precise rotary feedback, the VLX-25 delivers industry-leading accuracy in a miniature package.

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Features

Lightweight and compact structure for minimal impact on systems
Exceptional repeatability with high-precision rotary feedback
Wear-free operation enabled by contactless capacitive sensing
Best-in-class accuracy through scaled precision technology
Superior resistance to magnetic interference and EMI
Built for long-term durability with minimal maintenance needs

Unique Values

Low Profile
Wide mounting
High precision
Immunity to Magnetic

OD

25 mm
ID

2.2 mm
Height

6.3 mm
Weight

3.6 gr
Resolution

17-21 bit
Accuracy

±0.025˚

Technical Data

Technical Drawing

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General

Angular resolution 17-21 bit
Nominal position accuracy ±0.025°
Repeatability 2.7 mdeg / 9.9 Arcsec
Maximum operational speed 8,000 rpm
Measurement range Single Turn absolute with optional shaft turn counter
Built In Test BIT Optional
Rotation direction Adjustable CW/CCW (Default same direction from bottom side of the encoder

Mechanical

Allowable mounting eccentricity ±0.1 mm
Allowable axial mounting tolerance ±0.15 mm / ±0.2 mm using auto calibration
Rotor inertia 37.8 gr · mm²
Total weight 3.6 gr
Outer Ø / Inner Ø / Height 25 / 2.2 / 6.3 mm
Material (stator, rotor) PCB (FR4)
Nominal air gap (stator, rotor) 0.6 mm

Electrical

Supply voltage 5V ± 5%
Current consumption ~90 mA
Interconnection Connector: DF52-10S -0.8H
Communication SSi / BiSS-C
Output code Binary
Serial output Differential RS-422
Clock frequency 0.1-5.0 MHz
Position update rate 35 kHz (Optional - up to 375 kHz)

Environmental

EMC IEC 6100-6-2, IEC 6100-6-4
Operating temperature -40°C to +85°C
Storage temperature -40°C to +85°C
Relative humidity 98% Non condensing
Shock endurance / functional 100g 6msec saw-tooth per IEC 60068-2-27:2009
Vibration endurance 20g @ 10 to 2000 Hz sweep per IEC 60068-2-6
Protection IP 40

No Bearing Encoders using absolute rotary encoder technology

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OD
- 25 mm (ID - 2.2 mm)
- 35 mm (ID - 11 mm)
- 60 mm (ID - 25 mm)
- 80 mm (ID - 35 mm)
- 100 mm (ID - 48 mm)
- 140 mm (ID - 90 mm)
- 170 mm (ID - 110 mm)
- 247 mm (ID - 171 mm)
Communication
- BiSS
- SSi
Resolution
- 17 bit
- 18 bit
- 19 bit
- 20 bit
- 21 bit
- 22 bit
- 23 bit
BIT
- Disabled
- Enabled
Shaft-turn Counter
- 2,048
- 4,096
- 8,192
- 16,384
- 32,768
- None
Interconnection
- Horizontal Connector
- Vertical Connector
Rotor Type
- Hollow Shaft Encoder
- End Shaft - Single Screw- VL35
- End Shaft - Single Screw VL25
- Shaft with Insert
Extended Accuracy
- Enabled
- Disabled