High Vacuum Encoders for Harsh Space Conditions

VLS-247

The Netzer VLS-247 Absolute Rotary Encoder delivers up to 22-bit resolution with 0.006 Degree accuracy in an ultra-thin (<10.7 mm), lightweight (<220g) package. Featuring contactless capacitive sensing, it ensures wear-free operation and long-term reliability in spaceflight, satellite mechanisms, and ultra-clean manufacturing environments. Designed to minimize mass and maximize precision, the VLS-247 sets a new benchmark for high-end motion control in aerospace and cleanroom applications.

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Features

COTS space-tested for unmatched reliability in advanced aerospace systems
Reduced inertia and optimized system integration with hollow shaft
Best-in-class repeatability for extreme accuracy
Exceptional shielding against electromagnetic and radio interference
Compact, lightweight build ideal for space-constrained applications
Designed for minimal maintenance and extended service life

Unique Values

High precision
Space tested
Immunity to Magnetic
Repeatability

OD

247 mm
ID

171 mm
Height

9 mm
Weight

220 gr
Resolution

17-22 bit
Accuracy

±0.006˚

Technical Data

Technical Drawing

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General

Angular resolution 17-22 bit
Nominal position accuracy ±0.006°
Repeatability 1.4 mdeg / 4.9 Arcsec
Maximum operational speed 4,000 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 ±0.3 mm
Rotor inertia 876,053 gr · mm²
Total weight 220 gr
Outer Ø /Inner Ø / Height 247 / 171 / 9 mm
Material (stator / rotor) FR4
Nominal air gap (stator, rotor) 1 mm

Electrical

Supply voltage 5V ± 5%
Current consumption ~90 mA
Interconnection Cable (standard 250mm)
Communication SSi / BiSS-C
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 +105°C (Optional -55°C to +125°C)
Storage temperature -55°C to +125°C
Relative humidity 98% Non condensing
Shock endurance / functional 100g 6msec saw-tooth per IEC 60068-2-27:2009 40g 11msec saw-tooth per MIL-810G
Vibration functional 7.7grms @ 20 to 2000 Hz per MIL-810G Category 24
Protection IP 40

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OD
- 25 mm (ID - 2.2 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)
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
Cable Type
- Jacket and shielded cable
- Shielded cable
- Wires only
- ESA Space Cable
Cable Length
- 250 mm Flying leads - 28AWG
- 500 mm Flying leads - 28AWG
- 750 mm Flying leads - 28AWG
- 1000 mm Flying leads - 28AWG
Rotor Type
- Hollow Shaft Encoder
- End Shaft - Single Screw VL25
- Shaft with Insert
Custom
- High Temperature