OMRON Photoelectric Switch with Built-in Sensor Amplifier (Medium Size) E3S-A E3S-A Data Sheet
Summary
These photoelectric sensors are essential industrial automation tools used for reliable object detection in various applications. The accompanying manual serves as a comprehensive guide, detailing models for diverse sensing methods—including through-beam, timer, and retro-reflective technologies—along with necessary accessories, connectors, and safety protocols. This resource is designed for engineers and technicians that require accurate hands-on selection guidelines when specifying sensors for automated manufacturing or control systems.
Page 1 Text Content
Built-in Amplifier Photoelectric Sensor (Medium Size)
CSM_E3S-A_DS_E_12_1
Be sure to read Safety Precautions on page 10.
Ordering Information
Built-in Amplifier Photoelectric Sensors Red light Infrared light Connection Model
Sensing method Appearance Sensing distance Functions
method NPN output PNP output
E3S-AT11 2M E3S-AT31 2M Emitter E3S-AT11-L Emitter E3S-AT31-L Receiver E3S-AT11-D Receiver E3S-AT31-D
Pre-wired
E3S-AT21 2M E3S-AT41 2M
Horizontal Timer Turbo
Emitter E3S-AT21-L Emitter E3S-AT41-L
External
Self Diagnosis Diagnosis
Receiver E3S-AT21-D Receiver E3S-AT41-D E3S-AT16 E3S-AT36
Connector
Emitter E3S-AT16-L Emitter E3S-AT36-L
Through-beam Receiver E3S-AT16-D Receiver E3S-AT36-D
Sensors *1 E3S-AT61 2M E3S-AT81 2M
Emitter E3S-AT61-L Emitter E3S-AT81-L Receiver E3S-AT61-D Receiver E3S-AT81-D
Pre-wired
E3S-AT71 2M E3S-AT91 2M
Vertical
Timer Turbo
Emitter E3S-AT71-L Emitter E3S-AT91-L
External
Self Diagnosis Diagnosis
Receiver E3S-AT71-D Receiver E3S-AT91-D E3S-AT66 E3S-AT86
Connector
Emitter E3S-AT66-L Emitter E3S-AT86-L
Receiver E3S-AT66-D Receiver E3S-AT86-D E3S-AR11 2M E3S-AR31 2M
Pre-wired
Timer Turbo
Horizontal E3S-AR21 2M E3S-AR41 2M External
Self Diagnosis Diagnosis
Connector
E3S-AR16 E3S-AR36
Retro-reflective (M12)
Sensors (100 mm) E3S-AR61 2M E3S-AR81 2M
Pre-wired *2
Vertical Timer Turbo
E3S-AR71 2M E3S-AR91 2M External
Self Diagnosis Diagnosis
Connector
E3S-AR66 E3S-AR86
*1. Through-beam Sensors are normally sold in sets that include both the Emitter and Receiver. Orders for individual Emitters and Receivers are accepted. *2. Values in brackets are the minimum required distance between the Sensor and Reflector.
Page Summary Contents For OMRON Photoelectric Switch with Built-in Sensor Amplifier (Medium Size) E3S-A E3S-A Data Sheet
Manual Details
| Brand | Omron |
|---|---|
| Pages | 21 |
| File Size | 4.89 MB |
| Published | June 06, 2026 |
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Frequently Asked Questions
What is the most important safety guideline I need to follow when using this equipment?
You must read the Safety Precautions on page 10, and never use the product for an application involving serious risk to life or property.
If I install a Through-beam Model, how many mounting brackets do I need?
You must order two Mounting Brackets: one specifically for the Emitter and another for the Receiver.
Are the specified performance data values guaranteed accurate for my unique setup?
No; the data is provided as a guide. Users must correlate it to actual application requirements, as performance is subject to Omron’s Warranty.
What do 'Self Diagnosis' models offer over standard sensors?
Sensors designated with Self Diagnosis provide an internal feature allowing monitoring of their operational status.