Heidelberg Sensor M2.110.1391

The supplied part number is M2.110.1391. The exact code is sold online simply as “Heidelberg M2.110.1391 Sensor” without a fuller technical description, and it is grouped inside an SM52 GTO52 accessories section by one seller. That gives some market evidence for the code, but not enough to confirm the sensor type from that source alone.

During research, I found a stronger and more detailed Heidelberg-style match for the very similar code G2.110.1391/ and its suffix variant G2.110.1391/01. In SM 52 parts-list references, G2.110.1391/ is described as “Machine guard circuit MAGN REED PROX MSS” and G2.110.1391/01 as “Sensor MAGN REED PROX MSS.” Heidelberg eShop search results also surface G2.110.1391/ with the same machine-guard-circuit wording. That makes magnetic reed proximity sensor / machine guard circuit sensor the best-supported technical terminology found in the available sources, but for the G2 code, not conclusively for M2.110.1391.

Because the web evidence is split between an exact M2 listing with no technical detail and stronger G2 documentation with detailed function, the safest catalog approach is to name the item Heidelberg Sensor M2.110.1391 and clearly state that the function appears related to a magnetic reed proximity / machine guard circuit sensor family, pending technical verification of the prefix and installed sample.

Part Number Variations

Supplied number: M2.110.1391
Closest documented related numbers found: G2.110.1391/ and G2.110.1391/01
Documented function of related numbers: machine guard circuit / magnetic reed proximity sensor MSS
I did not find reliable proof that M2.110.1391 and G2.110.1391/ are interchangeable, so they should not be merged commercially without checking the machine parts book, label photo, or original sample.

Documented Compatibility

The only direct compatibility clue for the exact supplied code is its placement in an SM52 GTO52 accessories catalog page. The stronger technical references for the related G2.110.1391/ and G2.110.1391/01 point specifically to SM 52. Since I did not find authoritative documentation tying the exact M2.110.1391 code to a confirmed Heidelberg model list, the safest wording is: compatibility requires technical verification.

Technical Specifications

Product name: Heidelberg Sensor
Part number: M2.110.1391
Best-supported related sensor family found: magnetic reed proximity sensor MSS
Related Heidelberg-style references found: G2.110.1391/, G2.110.1391/01
Documented related machine reference: SM 52
Exact M2 code evidence level: aftermarket seller listing only; no full official function found in the sources reviewed.