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Absolute Single-Turn Optical Encoders

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An absolute optical rotary encoder provides a unique binary word for each position. Single-turn encoders are ideal for motion control applications where the position-sensing device moves at a slow rate under one rotation or is inactive for long periods of time.

Absolute encoders excel in situations where the position information is needed only periodically (not continuously) or in instances where a power outage requires a machine to be able to reorient itself without having to "re-zero" any of its settings. In these instances once the encoder has power again, the controller knows the position as soon as it reads the data lines from the encoder.

shaftedShafted Body Style

58mm, 2.5" Body Diameters

CHM5 optical absolute encoder

Model CHM5 Absolute Shaft Encoder

58mm shafted encoder offers IP65 or IP67 environmental protection, high resolution and a variety of output options.

  • Shaft Size: 6 to 10mm (0.24” to 0.39”)
  • Resolution (Max): 16 bits
  • Mechanical Speed RPM (Max): 9,000
  • Standard Operating Temperature °C: -20°C to +90°C
  • Extreme Environments: Wet, Dirty/Dusty, Extended Temperature
Encoders for wet environmentsEncoders for dirty and dusty environmentsEncoders for extended temperature environmentsView Data Sheet Biss output (PDF -188KB)
CAM output (PDF -116KB)
CANopen output (PDF -120KB)
Parallel output (PDF -259KB)
SSI output (PDF -144KB)
H25 optical absolute encoder

Model H25® / H25X Absolute Shaft Encoder

2.5" shafted absolute rotary encoder featuring EMI shielding, 40-lb ABEC 7 bearings, with gray code, natural binary, binary coded decimal, or excess gray code output.

  • Shaft Size: 0.375" to 0.50" (9.53mm to 12.7mm)
  • Resolution (Max): 15 bits
  • Mechanical Speed RPM (Max): 12,000
  • Standard Operating Temperature °C: 0°C to +70°C
  • Extreme Environments: Wet, Dirty/Dusty, Extended temp, High Shaft Load, Corrosive/Washdown, High Shock/Vibration
Encoders for wet environmentsEncoders for dirty and dusty environmentsEncoders for extended temperature environmentsEncoders and sensors for high shaft load environmentsEncoder products for corrosive or washdown environmentsEncoder products high shock and vibration environmentsView Data Sheet Model H25® 12 to 13 bits (PDF -694KB)
Model H25X 14 to 15 bits (PDF -544KB)

90mm, 3.8" Body Diameters

Absolute encoder chm9 from BEI

Model CHM9 Absolute Shaft Encoder

90mm shafted encoder especially designed for heavy duty applications. Available with Biss, Parallel and SSI outputs.

  • Shaft Size: 11mm to 14mm
  • Resolution (Max): 10,000
  • Mechanical Speed RPM (Max): 6,000
  • Standard Operating Temperature : -20°C to +80°C
  • Extreme Environments: Dirty/Dusty, Extended Temperature, High Shaft Load, Corrosive/Washdown, High Shock/Vibration
Encoders for dirty and dusty environmentsEncoders for extended temperature environmentsEncoders and sensors for high shaft load environmentsEncoder products for corrosive or washdown environmentsEncoder products high shock and vibration environmentsView Data Sheet Biss output (PDF -209KB)
Parallel output (PDF -231KB)
SSI output (PDF -231KB)
H38 absolute encoder for explosion proof rotary motion control solutions

Model H38 Absolute Explosion Proof Encoder

3.8" shafted explosion-proof encoder features double bearing seals and cast aluminum housing with hard anodized and dichromate sealed finish.

  • Shaft Size: 0.375" (9.53mm)
  • Resolution (Max): 13 bits
  • Mechanical Speed RPM (Max): 10,000
  • Standard Operating Temperature: 0°C to +70°C
  • Available Certifications: Explosion Proof, Intrinsic-Safety
  • Extreme Environments: Wet, Dirty/Dusty, Extended temp, Corrosive/Washdown, Hazardous Area, High Shock/Vibration
Encoders for wet environmentsEncoders for dirty and dusty environmentsEncoders for extended temperature environmentsEncoders for corrosive or washdown environmentsEncoders for hazardous areasEncoder products high shock and vibration environmentsView Data Sheet

4.0" and 116mm Body Diameters

H40 absolute shock-proof encoder

Model H40 Absolute Shock Proof Encoder

4.0" shafted shock-proof encoder offers the precision of an optical encoder with an internal structure that is totally isolated from severe shock and shaft loading conditions.

  • Shaft Size: 0.625" (15.88mm)
  • Resolution (Max): 72,000
  • Mechanical Speed RPM (Max): 13 bits
  • Standard Operating Temperature: 0°C to+70°C
  • Available Certifications: : Explosion Proof, Intrinsic-Safety
  • Extreme Environments: Wet, Dirty/Dusty, Extended temp, High Shaft Load, Hazardous Area, High Shock/Vibration
Encoders for wet environmentsEncoders for dirty and dusty environmentsEncoders for extended temperature environmentsEncoders and sensors for high shaft load environmentsEncoders for hazardous areasEncoder products high shock and vibration environmentsView Data Sheet
CAMX flame-proof encoder

Model CAMX / CEMX Absolute Flame Proof Encoder

116mm shaft encoder is flame proof and specially designed for heavy-duty hazardous area environments. Available with stainless steel housing as Model CEMX.

  • Shaft Size: 12mm (0.47")
  • Resolution (Max) : 13 bits
  • Mechanical Speed RPM (Max): 6,000
  • Standard Operating Temperature: -20°C to +40°C
  • Available Certifications: Explosion Proof
  • Extreme Environments: Dirty/Dusty, Extended temperature, Corrosive Washdown, Hazardous Area. High Shock/Vibration
Encoders for dirty and dusty environmentsEncoders for extended temperature environmentsEncoder products for corrosive or washdown environmentsEncoders for hazardous areasEncoder products high shock and vibration environmentsView Data Sheet

through-shaftThrough Shaft Body Style

58mm Body Diameter

CHO5 optical absolute encoder

Model CHO5 Absolute Hollow Shaft Encoder

58mm through shaft, optical rotary encoder offers IP65 or IP67 environmental protection, high resolution and a variety of output options.

  • Bore Size: 6mm to 14mm (0.24" to 0.55")
  • Resolution (Max) : 16 bits
  • Mechanical Speed RPM (Max): 6,000
  • Standard Operating Temperature: -20°C to+85°C
  • Extreme Environments: Dirty/Dusty, Extended temp
Encoders for dirty and dusty environmentsEncoders for extended temperature environmentsView Data Sheet Biss output (PDF -214KB)
CANopen output (PDF -153KB)
Parallel output (PDF -164KB)
SSI output (PDF -171KB)

3.5", 90mm, 109mm Body Diameters

HS35 optical absolute encoder

Model HS35 Absolute Hollow Shaft Encoder

3.5" through shaft optical rotary encoder is available as a through shaft or blind shaft, and features dual bearings, IP65 environmental rating, a rugged metal housing and either gray code or natural binary output. Available with optional hazardous are certifications.

  • Bore Size: 0.50" to 1.00" (12.7mm to 25.4mm)
  • Resolution (Max): 16 bits
  • Mechanical Speed RPM (Max): 6,000
  • Standard Operating Temperature: 0°C to +70°C:
  • Available Certifications: Intrinsic-Safety, Nonincendive
  • Extreme Environments: Dirty/Dusty, Extended Temperature, Hazardous Area
Encoders for dirty and dusty environmentsEncoders for extended temperature environmentsEncoders for hazardous areasView Data Sheet
CHU9 optical absolute encoder

Model CHU9 Absolute Hollow Shaft Encoder

90mm through shaft rotary encoder especially design for heavy-duty applications, featuring IP65 environmental protection and optional stainless steel housing.

  • Bore Size: 10mm to 30mm (0.60" to 1.18")
  • Resolution (Max): 16 bits
  • Mechanical Speed RPM (Max): 3,600
  • Standard Operating Temperature : -20°C to +80°C
  • Extreme Environments: Dirty/Dusty, Corrosive/Washdown, High Shock/Vibration
Encoders for dirty and dusty environmentsEncoder products for corrosive or washdown environmentsEncoder products high shock and vibration environmentsView Data Sheet CANopen output (PDF -115KB)
Parallel output (PDF -256KB)
SSI output (PDF -254KB)
CAUX flame-proof encoder

Model CAUX / CEUX Absolute Hollow Shaft Encoder

116mm through shaft rotary encoder is flame proof and specially designed for heavy-duty hazardous area environments. Available with stainless steel housing as Model CEUX.

  • Bore Size: 16mm to 30mm (0.63" to 1.18")
  • Resolution (Max) : 14 bits
  • Mechanical Speed RPM (Max): 3,000
  • Standard Operating Temperature: -20°C to +40°C
  • Available Certifications: Flameproof
  • Extreme Environments: Dirty/Dusty, Extended temperature, Corrosive Washdown, Hazardous Area.
Encoders for dirty and dusty environmentsEncoders for extended temperature environmentsEncoder products for corrosive or washdown environmentsEncoders for hazardous areasView Data Sheet

blind-shaftBlind Shaft Body Style

3.5" Body Diameter

HS35 optical absolute encoder

Model HS35 Absolute Through Shaft Encoder

3.5" through shaft rotary encoder is available as a through shaft or blind shaft, and features dual bearings, IP65 environmental rating, a rugged metal housing and either gray code or natural binary output. Available with optional hazardous are certifications.

  • Shaft Size: 0.50" to 1.00" (12.7mm to 25.4mm)
  • Resolution (Max): 16 bits
  • Mechanical Speed RPM (Max): 6,000
  • Standard Operating Temperature: 0°C to +70°C:
  • Available Certifications: Intrinsic-Safety, Nonincendive
  • Extreme Environments: Dirty/Dusty, Extended Temperature, Hazardous Area
Encoders for dirty and dusty environmentsEncoders for extended temperature environmentsEncoders for hazardous areasView Data Sheet

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