Omron E3S-R36 Retroreflective Optical Sensor - Equivalent & Substitute Parts

Part Overview

The Omron E3S-R36 is a retroreflective, polarized optical sensor designed for detection applications requiring adjustable sensing distances from 100mm to 1m. The sensor features PNP output with selectable Dark-ON/Light-ON operation, operates across a 10V to 30V supply range, and is housed in a cable-connected configuration with IP67 ingress protection.

The E3S-R36 carries an Obsolete product status. Identifying equivalent substitute parts is necessary to maintain system functionality and ensure continued availability for replacement or new installations where this sensor specification remains applicable.

Substiute Parts

E3S-R36

Omron Automation and SafetyIn Stock: 878E3S-R36 Datasheet

Current PartRFQ

E3Z-B87

Omron Automation and SafetyIn Stock: 839E3Z-B87 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the E3S-R36 are identified based on the following critical parameters that determine functional compatibility:

• Sensing Method: Retroreflective operation (polarized or standard retroreflective)
• Output Configuration: PNP with Dark-ON/Light-ON selectable capability
• Response Time: 1ms performance standard
• Ingress Protection: IEC IP67 rating
• Operating Temperature Range: -25°C ~ 55°C
• Light Source: Red wavelength (680nm ~ 700nm range)
• Voltage Supply Compatibility: Overlap within 10V ~ 30V or 12V ~ 24V ranges

The E3Z-B87 qualifies as a substitute based on matching retroreflective sensing method, PNP output with selectable Dark-ON/Light-ON operation, 1ms response time, IP67 protection, compatible temperature range, red light source, and overlapping voltage supply specifications (12V ~ 24V falls within the E3S-R36's 10V ~ 30V range).

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The E3S-R36 is classified as Obsolete. The E3Z-B87 carries Active product status, ensuring ongoing manufacturer support, availability, and compliance updates.

Compliance & Certifications: The E3Z-B87 is RoHS Compliant, providing environmental regulatory alignment. Both parts share identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications, confirming trade compliance equivalence.

Functional Alignment: The E3Z-B87 maintains core functional parameters—retroreflective sensing, PNP output with selectable Dark-ON/Light-ON operation, 1ms response time, and IP67 protection—making it suitable for applications where the E3S-R36 was previously deployed.

Application-Specific Factors: Selection between these parts depends on:

• Whether the fixed 2m sensing distance of the E3Z-B87 accommodates the application (versus the adjustable 100mm ~ 1m range of the E3S-R36)
• Whether connector-based connection (E3Z-B87) is compatible with existing wiring infrastructure (E3S-R36 uses cable connection)
• Whether the absence of polarization filtering in the E3Z-B87 is acceptable for the target environment

Frequently Asked Questions (FAQ)

Q: Can the E3Z-B87 directly replace the E3S-R36 in existing installations?

A: Functional replacement is possible if the application tolerates the E3Z-B87's fixed 2m sensing distance and connector-based connection method. The E3S-R36's adjustable range and cable connection may be required for specific mounting or distance configurations. Verify mechanical fit and electrical connection compatibility before substitution.

Q: What is the difference between polarized and standard retroreflective sensing?

A: The E3S-R36 includes polarization filtering to reduce false triggers from specular reflections. The E3Z-B87 uses standard retroreflective sensing without polarization. In environments with high ambient reflectivity or specular surfaces, the E3S-R36's polarization feature may provide superior noise immunity.

Q: Are the voltage supply ranges compatible?

A: Yes. The E3Z-B87 operates within 12V ~ 24V, which is a subset of the E3S-R36's 10V ~ 30V range. Systems designed for 12V or 24V operation will function with either part. Systems requiring 10V or 30V operation require the E3S-R36.

Q: What is the significance of the different adjustment types?

A: The E3S-R36 features a two-turn endless adjuster for fine-tuned distance calibration across its 100mm ~ 1m range. The E3Z-B87 uses a single-turn adjuster and operates at a fixed 2m distance. The E3S-R36 is preferred where precise, adjustable sensing distance is critical.

Q: Does the difference in light source wavelength (700nm vs. 680nm) affect compatibility?

A: Both wavelengths fall within the red spectrum and are compatible with standard retroreflective reflectors. The 20nm difference is negligible for typical optical sensor applications and does not impact functional substitution.

Q: Why is the E3Z-B87 listed as Active while the E3S-R36 is Obsolete?

A: Product lifecycle classifications reflect manufacturer support status. Active products receive ongoing technical support, availability guarantees, and compliance updates. Obsolete products may have limited or no availability. The E3Z-B87's Active status ensures long-term supply chain reliability.