Product Description

​The Omron E3T-SL21 is an ultracompact, ultrathin photoelectric sensor with a built-in amplifier, designed for precise object detection in limited spaces. Utilizing a limited reflective sensing method, it offers a sensing distance ranging from 5 to 30 mm when detecting a 50 x 50 mm white paper target. The sensor emits red light at a wavelength of 650 nm and features a light-ON operation mode with an NPN open collector output. It operates with a supply voltage of 12 to 24 VDC ±10% and consumes a maximum current of 20 mA.

Technical Specifications

• Sensing Method: Limited Reflective​
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• Sensing Distance: 5 to 30 mm (using a 50 x 50 mm white paper target)​
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• Light Source: Red LED (650 nm)​
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• Operation Mode: Light-ON​
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• Output Configuration: NPN open collector​
• Maximum Load Voltage: 26.4 VDC​
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• Maximum Load Current: 50 mA​
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• Residual Voltage: 1 V max. (load current <10 mA); 2 V max. (load current 10 to 50 mA)​
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• Supply Voltage: 12 to 24 VDC ±10% (ripple (p-p) 10% max.)​
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• Current Consumption: 20 mA max.​
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• Response Time: Operate or reset: 1 ms max.​
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• Ambient Light Immunity: Incandescent lamp: 5,000 lx max.; Sunlight: 10,000 lx max.​
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• Operating Temperature Range: -25 to 55°C (with no freezing or condensation)​
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• Storage Temperature Range: -40 to 70°C (with no freezing or condensation)​
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• Operating Humidity Range: 35% to 85% (with no condensation)​
• Storage Humidity Range: 35% to 95% (with no condensation)​
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• Insulation Resistance: 20 MΩ min. (at 500 VDC megger)​
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• Dielectric Strength: 1,000 VAC at 50/60 Hz for 1 min​
• Vibration Resistance: Destruction: 10 to 2,000 Hz, 1.5 mm or 300 m/s² double amplitude for 0.5 hours each in X, Y, and Z directions​
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• Shock Resistance: Destruction: 1,000 m/s², three times each in X, Y, and Z directions​
• Degree of Protection: IP67​
• Mounting Method: M2 mounting​
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• Connection Method: Pre-wired model with a 2 m cable​
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• Indicators: Operation indicator (orange), Stability indicator (green)​
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• Weight: Approximately 20 g (including packaging)​
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• Accessories: Instruction manual, Mounting screws (M2 x 14), Nuts​
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• Materials:
• Case: Polybutylene terephthalate (PBT)​
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• Lens: Denatured Polyarylate​
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• Display: Denatured Polyarylate