DS-25 | ABSOLUTE ROTARY ENCODER Hollow Shaft | Polymer Encapsulated


  • Lightweight miniature absolute rotary encoder
  • Hollow floating shaft
  • No bearing or other contacts
  • High precision
  • High tolerance to temperature extremes, shock,
    EMI, RFI and magnetic fields
  • Digital interfaces for absolute position
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25 mm
6 mm
7 mm
10 gr
17-19 bit
The DS-25 miniature absolute rotary encoder is an advanced engineering feat in a compact package. This encoder is incredibly light and small, with a hollow floating shaft and a non-contact design that ensures reliable and long-lasting performance. With a resolution of 17-19 bits and exceptional accuracy (±0.010°), it is perfect for high-precision applications. Its robust construction with Ultem™ polymer and TRVX-50 materials, along with its ability to tolerate extreme temperatures, shock, EMI, RFI, and magnetic fields, makes it reliable and suitable for operation in diverse environments. The DS-25 offers versatile connectivity options with SSi/BiSS-C communication, a differential RS-422 serial output, and a #30 shielded cable interconnection. It's also compliant with EMC standards (IEC 6100-6-2, IEC 6100-6-4), and can operate effectively within a temperature range of -40°C to +85°C, making it an ideal choice for challenging industrial settings.

* Segmentally enhanced accuracy is available upon request. Contact Netzer for more information.

Technical Data

Ordering Code

  • Technical Drawing

  • General

    Angular resolution
    17-19 bit
    Nominal position accuracy
    Nominal position extended accuracy (EA)
    2.7 mdeg / 9.9 Arcsec
    Maximum operational speed
    4,000 rpm
    Measurement range
    Single turn absolute position
    Build In Test BIT
    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
    11 gr · mm²
    Total weight
    10 gr
    Outer Ø /Inner Ø / Height
    25 / 6 / 7 mm
    Material (stator / rotor)
    Ultem™ polymer / TRVX-50
  • Electrical

    Supply voltage
    5V ±5%
    Current consumption
    ~90 mA
    #30 shielded cable
    SSi / BiSS - C
    Output code
    Serial output
    Differential RS-422
    Clock frequency
    0.1- 5.0 MHz
    Position update rate
    35 kHz (Optional - up to 375 KHz)
  • Environmental

    IEC 6100-6-2, IEC 6100-6-4
    Operating temperature
    -40°C to +85°C
    Storage temperature
    -50°C to +85°C
    Relative humidity
    98% Non condensing
    Shock endurance / functional
    100 g for 11 ms / 40g 11ms (per MIL-STD-810G)
    Vibration functional
    20 g 10 – 2000 Hz (per MIL-STD-810G)
    IP 40
OC DS-25 Miniature Absolute Rotary Encoders
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