Avtron M7 Ultra-Low Temperature Encoders

Avtron M7 Ultra-Low Temperature Encoders

Ready for the Coldest Locations

  • Heavy, Mill Duty
  • Up to 1200 PPR -45°C to +80°C Operation
  • Immune to water, oil, dust, dirt, etc.
  • Withstands extreme shock and vibration
  • Extra heavy-duty bearings
  • Optional dual isolated outputs
  • Excellent for oil drilling and gas pipeline applications
Outline Drawing
Avtron M7 Hollow Shaft

Magnetic Hollow Shaft Mount Encoder, 1" to 1 1/8"

M7-4 and M7-5 heavy mill duty encoders are designed for direct mounting on motor or load shafts, from 1" to 1 1/8".

Forget fragile glass disk encoders! The M7 features Avtron’s rugged magnetic sensor and solid metal rotor technology. Our shatterproof, moisture proof systems ensure your application has maximum uptime.

No more tiny stub shafts on big motors or load shafts! The hollow shaft (tethered) models offer direct mounting on big shafts, from 1" to 1 1/8", without flanges, reducers, couplings, or other hardware. No rework is needed; just mount the encoder directly on the shaft, and secure the tether arm. The heavy duty bearings withstand runout and vibration that destroy lesser encoders.

If you have a rough application in a cold location, select an M7 encoder!

Operating Power: 5-24 VDC; Current 120mA per output, no load 24VDC
770mA @24VDC heater current required for operation below -40°C
Output Format: A,A–, B,B–; Optional Marker Z,Z–
Frequency Range: 0 to 100 KHz
PPR: 240-1200
Speed: 5000 RPM Max. Std., 1" to 1 1/8" shaft
Temperature: 80°C to -45°C (internal heater operation required below -40°C)
Chemical: Polyurethane enamel paint protects against salt spray, mild acids, and bases
Weight: 16 lbs./7kg.

All dimensions are in inches [millimeters].
Specifications and features are subject to change without notice.
  • Threaded rod torque arm for easy tethered mounting
  • Highly resistant to electrical and magnetic motor and brake noise
  • Second isolated output may be different PPR
  • Available armored wire gland
  • IP66 Enclosure
  • 1 Year No-Hassle Warranty
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,
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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

  • Axial Shaft Movement

    Motor shaft movement in or out, relative to the ends of the motor. Often motors that use roller or sleeve bearing construction have more axial shaft movement. Most Avtron modular encoders tolerate +/- 0.050" of axial movement maximum. Use hollow shaft encoders for high axial movement motor styles, such as MD motors. Most competitors’ modular encoders tolerate much less axial movement than Avtron products.

  • 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.

  • Hollow Shaft

    Hollow Shaft encoders mount by passing the shaft of the motor into or through the encoder. Hollow shaft encoders are easy to mount and replace but are vulnerable to damage. Also, the weight of the encoder must be considered for small motor shafts < 0.75" diameter. Avtron offers a full range of hollow shaft encoders, including: AV685, HS25A, HS35A, HS35M, M3, M4, M6, M7, XP45.

  • Wide-Gap Technology

    Avtron encoders use special optical sensors and magnetoresistive sensors, combined with proprietary circuit designs to allow the sensor to be located much farther from the magnetic rotor or optical disk. This eliminates sensor crashes and makes mounting easy and forgiving of mechanical variation.

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