Polyimide Substrate Radiation-Resistant Encoder for Space

VLS-80

The Netzer VLS-80 Absolute Rotary Encoder delivers up to 23-bit resolution with 0.006 Degree accuracy, housed in an ultra-thin (<10 mm), lightweight (<34g) form. Using advanced capacitive sensing technology, it ensures contactless, contamination-free operation—perfect for satellite mechanisms, space optics, and ultra-clean environments. Its hollow, low-inertia structure allows easy integration into weight-sensitive and vacuum-rated applications where ultimate precision is required.

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Features

COTS space-tested for uncompromised dependability in aerospace applications
Versatile hollow shaft with a wide inner diameter for flexible mounting
Industry-leading precision under 0.006 degrees
Wear-free performance ensured by contactless operation
Ultra-lightweight build to minimize system inertia
High reliability with extended mean time between failures

Unique Values

Space tested
High precision
Durability
Light weigth

OD

80 mm
ID

35 mm
Height

6.6 mm
Weight

21 gr
Resolution

17-23 bit
Accuracy

±0.006˚

Technical Data

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General

Angular resolution 17-23 bit
Nominal position accuracy ±0.006°
Repeatability 0.6 mdeg / 2.5 Arcsec
Maximum operational speed 2,000 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 ±0.1 mm
Rotor inertia 9,100 gr · mm²
Total weight 21 gr
Outer Ø /Inner Ø / Height 80 / 35 / 6.6 mm
Material (stator / rotor) Polyimide
Nominal air gap (stator, rotor) 0.6 mm

Electrical

Supply voltage 5V ±5%
Current consumption ~90 mA
Interconnection Cable (standard 250mm)
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 range -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 Parylene conformal coating: improved low outgassing, reduces Tin Whiskers risk.
Low out-gassing TML < 1%, CVCM < 0.1%
Radiation tested for TID = 30KRAD. SEE 1E11 p/cm²/s protons @200MeV

radiation resistant encoders using absolute rotary encoder technology

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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