In the field of motion control and industrial automation, incremental encoders are essential for delivering precise feedback and stable performance. The M6C-4S1XH51-W003 Avtron M6C incremental encoder stands out for its ability to operate reliably in harsh conditions, making it an excellent choice for industries such as oil & gas, heavy machinery, and winch systems. Its combination of durability and accuracy ensures that businesses can maintain efficient workflows without unexpected downtime.
High-Quality Replacement Solutions
We supply M6C-4S1XH51-W003 encoder replacement solutions that are produced using specialized non-standard processes, while ensuring 1:1 compatibility with the original encoder specifications. This means our replacements can be installed seamlessly without any modifications, acting as a perfect substitute for the prototype unit.


Main Features and Benefits
- Fully matched parameters for direct interchangeability
- Rugged design suitable for demanding industrial applications
- Helps overcome sourcing delays and procurement challenges
- Real product images available for customer verification
- Cost-efficient alternative with no compromise in performance
Why Our Encoder Replacements Make Sense
Sourcing genuine Avtron encoders can sometimes be expensive or involve long lead times. By choosing our M6C-4S1XH51-W003 incremental encoder replacement, you get the same precision, stability, and reliability—while benefiting from quicker availability and lower costs. This ensures your equipment continues to run smoothly, reducing downtime and keeping production efficient.
Introduction
Avtron M6C explosion protected ATEX and IECEx rated severe mill duty rotary encoders are designed for direct mounting on motor or load shafts, from 1" to 1 1/8" [25-30mm].
The M6C is an updated model which directly replaces the M6 encoder, and M6C adds IECEx certification. No barrier or isolator is required-mount M6C directly in any ATEX or IECEx Zone 1 application.
Why take a chance with weak optical encoders on your drilling rig? The M6C features Avtron Encoders' rugged magnetic sensor and solid metal rotor technology. Our shatterproof, moisture proof systems ensure your application has maximum uptime. The hollow shaft (tethered) models offer direct mounting on 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.
M6C also includes a complete wiring protection system--it can survive all types of wiring errors and drive signals down the longest cables.
For more information on keeping your rotary encoders working in oil and gas applications, visit our oil and gas blog.
We believe explosion protected encoders should also be ready to withstand the rough drilling environment. Try the M6C today!
Parameters
Operating Power: Volts: 5-24 VDC; Current: 120mA, no load
Output Format: A, /A, B, /B; Optional Marker Z, /Z
Frequency Range: 0 to 250 kHz @ 6 V & 1 meter cable
PPR: 240-1200
Speed: 5000 RPM Max. Std.
Temperature: 80°C to -40°C (-40°C optional, -20°C standard)
Chemical: Polyurethane enamel paint protects against salt spray, mild acids, and bases
Enclosure Rating: IP66
Explosion Protection:
ATEX 0539 II 2 G Ex d e IIB T4 Gb
(Tamb = -40/-20°C to +80°C)
IECEx Ex d e IIB T4 Gb
(Tamb = -40/-20°C to +80°C)
Weight: 18 lbs. / 8kg.