Omron E3S-R37 Retroreflective Optical Sensor - Equivalent & Substitute Parts

Part Overview

The Omron E3S-R37 is a retroreflective optical sensor designed for detection applications requiring adjustable sensing distances between 0.394" and 1.181" (10mm to 30mm). The sensor features PNP output with selectable Dark-ON/Light-ON operation, powered by a 10V to 30V supply, and operates across -25°C to 55°C. The E3S-R37 is classified as obsolete, making identification of suitable substitute components necessary for ongoing system maintenance and new design implementations.

Substiute Parts

E3S-R37

Omron Automation and SafetyIn Stock: 718E3S-R37 Datasheet

Current PartRFQ

E3Z-B86

Omron Automation and SafetyIn Stock: 3666E3Z-B86 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute identification for the E3S-R37 is based on the following critical parameters that define functional compatibility:

• Sensing Method: Retroreflective operation must be maintained
• Output Configuration: PNP output with Dark-ON/Light-ON selectability
• Response Time: 1ms performance requirement
• Ingress Protection: IEC IP67 rating
• Operating Temperature Range: -25°C ~ 55°C
• Supply Voltage Compatibility: Overlap within 10V ~ 30V range

The E3Z-B86 qualifies as a substitute based on matching retroreflective sensing method, PNP output with selectable modes, 1ms response time, IEC IP67 protection, and compatible operating temperature range. However, the E3Z-B86 operates at a different sensing distance (500mm fixed versus 10-30mm adjustable) and uses a different light source wavelength (Red 680nm versus Infrared 880nm), requiring application-level assessment for specific use cases.

Parameter Comparison

Engineering Selection Recommendations

The E3Z-B86 is an active production substitute for the obsolete E3S-R37, sharing core functional parameters including retroreflective sensing, PNP output selectability, 1ms response time, IEC IP67 protection, and identical operating temperature range. The E3Z-B86 supply voltage range (12V ~ 24V) is fully contained within the E3S-R37 specification (10V ~ 30V), ensuring power supply compatibility in most applications.

Substitution feasibility depends on application-specific requirements regarding sensing distance and light source wavelength. The E3Z-B86 fixed 500mm sensing distance differs significantly from the E3S-R37 adjustable 10-30mm range, requiring mechanical and optical system redesign. The shift from Infrared (880nm) to Red (680nm) light source may affect reflector material compatibility and ambient light interference characteristics. The E3Z-B86 connector-based connection differs from the E3S-R37 cable connection, necessitating wiring harness modification.

Frequently Asked Questions (FAQ)

Q: Can the E3Z-B86 directly replace the E3S-R37 in existing installations?

A: Direct replacement is not possible without system modifications. While core electrical parameters match, the E3Z-B86 has a fixed 500mm sensing distance compared to the E3S-R37's adjustable 10-30mm range, and uses a connector interface instead of cable connection. Mechanical mounting and wiring changes are required.

Q: What are the key compatibility criteria for E3S-R37 substitutes?

A: Substitute sensors must maintain retroreflective sensing method, PNP output with Dark-ON/Light-ON selectability, 1ms response time, IEC IP67 ingress protection, and -25°C to 55°C operating temperature range. Supply voltage must overlap with the 10V ~ 30V specification.

Q: Does the light source wavelength difference affect substitution?

A: Yes. The E3Z-B86 uses Red (680nm) light versus the E3S-R37's Infrared (880nm). Reflector materials and ambient light conditions may respond differently to each wavelength, requiring application validation.

Q: Is the E3Z-B86 RoHS compliant?

A: Yes, the E3Z-B86 is RoHS Compliant. The E3S-R37 RoHS status is not specified in available documentation.

Q: What is the inventory status for these parts?

A: The E3S-R37 is obsolete with 665 units in stock. The E3Z-B86 is an active product with 3586 units in stock, ensuring long-term availability for new designs.