Avtron AV20 Encoders

Avtron AV20 Encoders

Setting a New Standard

  • Shaft Sizes include 1/4", 3/8", and 10mm
  • Simple Installation
  • Unbreakable Optical Disk
  • Up to 3600 PPR
  • Wide-Gap Technology: Up to 8X larger gap between sensor and rotor
  • Direct Replacement for Model H20 and Others without Rewiring
  • Industry Standard Face or Flange Mounting
  • IP65/Nema 4 Rating: Dust and Liquid Tight
  • Superior Bearings and Seals
  • -40°C to +100°C Operation
  • 2 Year No-Hassle Warranty
Outline Drawing
AV20 encoders look like industry standard incremental quadrature rotary encoder units, and fit the same mounting patterns on all machines. That's where the similarity ends. Our AV20 encoders can withstand conditions that make other encoders fail. The solid aluminum housing and stainless steel shaft offer increased durability in tough environments.
Avtron AV20 encoders have superior shaft seals and bearings that stay sealed to keep contaminants out, through temperature cycling and liquid sprays. Our encoder seals are protected by mechanical barriers to prevent flexing or failure. Avtron’s superior bearings permit much larger side and axial loads for pulley and belt applications, and feature synthetic lubricants for even longer life in all applications.
Many competitive optical encoder designs risk sensor damage from any vibration or shock: sensors ride less than four thousandths of an inch from the thin, often flexible, optical disk spinning at full motor speeds. Some designs even use thin glass disks in “industrial” products! Avtron uses only unbreakable disks and a sensor to disk gap over 8X larger than the competition.
Our optical AV20 encoders are setting a new standard for quality, durability, and performance. Select an Avtron AV20 today!
Operating Power: Volts: 5 - 28 VDC; Current: 50mA, no load
Output Format: A Quad B with marker (A,A–, B,B – , Z,Z – ) available
Frequency Range: 0 to 125 KHz
PPR: 1 - 3600 Standard (for other PPR needs consult factory)
Speed: 6000 RPM Max., (for higher speeds, consult factory)
  • Axial Load: 100 lbs [45 kg] max.
  • Radial Load: 100 lbs [45 kg] max.
Temperature: -40° to 100°C
Environment: Nema 4/IP65 (when provided with shaft seals)
Vibration: 5-2000 Hz
Shock: 50G, 11mS duration
Weight: 0.575 lbs [260 g]
  • All-digital design, no trim pots or adjustments for longer life
  • Advanced sensor technology
  • Superior bearings with synthetic lubricant for longer life
  • No extra charge for signal complements and marker pulse
  • More than 2X the axial and side load capability of the competition
  • Superior line drivers withstand short circuits and reverse voltage wiring errors
Industry General Food & Beverage Pulp & Paper Wood Products Wind Power Crane & Hoist Metals Mining Marine Oil & Gas

Light Mill Duty

AV20, AV25, AV32, AV6A, AV6M, HS25A, HS35A, HS6A, HS6M, K661,

Mill Duty

AV32, HS35M, K661, M185, M3, M3(small), RAHS35M

Heavy Mill Duty

AV115, AV125, AV45, AV5, AV56, AV56S, AV67, AV85, AV850, AV850Test, AVSK, Carlen Replacement, HS45, K661, M4, M4(small), XR115, XR12, XR125, XR45, XR4F, XR5, XR56, XR85, XR850, XR97, XRB1, XRB2

Severe Mill Duty

AV12, AV30, AV485, AV5, AV685, Carlen Replacement, HS40, K661, M484, M6, M6C, M7, XR12, XR485, XR5, XR685, XR97, XRB1, XRB2,
Avtron's AV20 encoders directly replace a broad range of encoders, including, but not limited to:

BEI H20, XH20
Dynapar H20, H21, H22, H23
Encoder Products Corporation (EPC) 702
Northstar:  HD20. HD2.0

And many other 2" encoder models.
For direct model replacements, try our cross reference page
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In This Section

  • A Quad B

    A Quad B refers to the set of output quadrature signals from an incremental quadrature encoder to indicate speed and direction, including complements: A, A NOT, B, B NOT (, , , ). Most Avtron encoders offer A Quad B output at no extra cost.  For more information on quadrature- Wikipedia: http://en.wikipedia.org/wiki/Quadrature_phase

  • Encoder

    A device which indicates position and speed via a set of digital outputs. Incremental encoders output quadrature (A Quad B) signals, and may add a marker pulse once per revolution.  Absolute encoders typically indicate position via a digital message, a set of parallel outputs, or analog values.

  • Face or Flange Mount

    A machined surface (NEMA 56C, NEMA FC) on the non-drive end of the motor is used to mount bearingless or pancake encoders such as Avtron AV56 THIN-LINE II™ encoders. Solid shaft, coupled tachometers also flange mounted using flange adapters, also called flowerpots.

  • Incremental Encoder

    An encoder that produces pulses in proportion to distance moved or rotated. Incremental encoders can also have a marker pulse Z, Z NOT (, ) once per revolution to provide a position reference. Avtron produces a full range of incremental rotary encoders.

  • IR LED

    Infra-Red Light Emitting Diode is the light source for an optical encoder.

  • Light Mill Duty

    Light Mill Duty encoders are designed for industrial applications but must be protected from contamination, temperature cycling, and physical force, including shock, vibration, and bearing loads. Examples include AV20, AV25, HS25A, and HS35A models.

  • Marker Pulse

    The Marker Pulse occurs once per revolution. The purpose of the marker pulse is to provide a repeatable home position location for positioning applications. The marker pulse is often abbreviated as "ØZ" or "Z" in the USA and "C" or "N" in Europe.

  • MS Connector

    The most used encoder connector style in North America. Available in 6, 7, and 10 pin versions, with 10 pins being the most common. Avtron offers pin-for-pin exact replacements for competitors’ models using MS connectors. MS connectors are extremely reliable but require soldering. Many users prefer industrial EPIC ® style connectors instead. EPIC® is a registered trademark of the Lapp Group.

  • Optical Encoder

    An Optical Encoder typically uses a light source shining through, or reflecting off, an optical disk with lines or slots that interrupt the beam of light to an optical sensor. Electronics count the interruptions of the beam and generate the encoder’s output pulses.

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