1. Overall Description:

️· The text details two series of photoelectric sensors: E3JM and E3JK. They are designed for various sensing applications.
️· They come in three main types:
- Through-beam (or opposed mode): The emitter and receiver are separate, and the beam must pass through an object to be detected. (Longest sensing range).
- Retroreflective: The emitter and receiver are in the same unit, and a reflector bounces the beam back to the receiver. (Medium sensing range)
- Diffuse (or proximity): The receiver detects light reflected *off* the object itself. (Shortest sensing range, most susceptible to background interference)

2. Key Specifications (Common to both E3JM & E3JK - unless otherwise noted):

️· Power Supply: Not specified, but assumed to be standard industrial voltages.
️· Output Types:
- Relay Output: SPDT, 250 VAC, 3A (cosφ=1) max., 5 VDC, 10 mA min.
- DC SSR Output: 48 VDC, 100 mA max. (residual voltage: 2 V max)
️· Control: Light-ON/Dark-ON selectable.
️· Life Expectancy (Relay Output): 50,000,000 operations (18,000 cycles/hour)
️· Electrical Life (Relay Output): 100,000 operations (1,800 cycles/hour)
️· Response Time:
- Relay output: 30 ms operate/reset (E3JM)
- DC SSR output: 5 ms operate/reset
️· Ambient Illumination Resistance: Incandescent lamp: 3,000 lx max.
️· Ambient Temperature Range: -25°C to 55°C (operating), -30°C to 70°C (storage)
️· Ambient Humidity Range: 45% to 85% (operating), 35% to 95% (storage), no condensation
️· Vibration Resistance: 10-55 Hz, 1.5mm double amplitude (destruction and malfunction specs given).
️· Shock Resistance: 500 m/s² (destruction), 100 m/s² (malfunction)
️· Degree of Protection: IEC 60529: IP66 (dust-tight, protected against powerful water jets)
️· Material:
- Case: ABS
- Lens: Methacrylic resin
- Cover: Polycarbonate
- Mounting Bracket: Iron

3. Model-Specific Details & Differences:

️· E3JM:
- Includes a timer function (ON-delay/OFF-delay/One-shot delay switch selectable) with adjustable delay time (0.1 to 10 seconds). *Timer function cannot be disabled.*
️· E3JK:
* Does not have the timer function.
- Diffuse sensors (Retroreflective mode) have a one-turn adjuster for sensitivity adjustment.

4. Accessories (Included):

️· Mounting Bracket (with screw)
️· Nuts
️· Terminal Protection Cover
️· Cable connection nuts (excluding -US models)
️· Instruction manual
️· Reflector (E39-R1 – *only* for retroreflective sensors).

5. Sizing and Weights (approximate)

️· E3JM packed weight: 270g
️· E3JK packed weight: 160g

Important Notes from the Text:

️· "-US Models" refers to models specifically designed for the US market, likely having different cable connection nuts.
️· The information provided is a summary and may not cover every possible model variation within the E3JM and E3JK series. Refer to the full Omron datasheet for complete specifications.