The E3F-20C1 is a long-range through-beam laser photoelectric proximity switch housed in a threaded M12/M18 brass-galvanized industrial enclosure. Utilizing a visible red collimated laser beam, it provides an operating detection distance of up to 20 meters. Designed to detect any opaque object breaking the beam path, it features an NPN Normally Open (NO) solid-state output, high immunity to ambient optical interference, and a wide DC operating voltage range suitable for industrial automation, assembly lines, and perimeter security.

Specifications

• Model: E3F-20C1
• Sensor Type: Through-Beam Laser Photoelectric Sensor (Transmitter and Receiver set)
• Light Source: Visible Red Laser Beam
• Operating Voltage: 6V to 36V DC
• Output Type: NPN Normally Open (NO, Sinking output)
• Maximum Output Load Current: 200mA to 300mA
• Sensing Distance: 0 to 20 meters (Adjustable via alignment)
• Target Object Type: Any opaque object
• Response Time: < 2>
• Housing Material: Galvanized Brass / Nickel-Plated Brass barrel
• Cable Length: 150 cm (Pre-wired industrial lead)
• Operating Temperature: -25°C to +55°C
• Protection Rating: IP65 / IP67 (Dust and splash resistant)

Wiring and Interface Guide

• Transmitter Unit (Laser Emitter):
  • Brown: Power Input (+6V to +36V DC)
  • Blue: Common Ground (0V / GND)
• Receiver Unit (Photo Detector):
  • Brown: Power Input (+6V to +36V DC)
  • Blue: Common Ground (0V / GND)
  • Black: NPN Normally Open Signal Output (Sinks to GND when beam is broken / object detected)

Key Features

• Visible Red Laser Alignment: The focused, visible red laser spot allows fast visual alignment over long spans up to 20 meters without specialized optical diagnostic tools.
• Pinpoint Object Detection: Narrow, collimated beam profile enables reliable sensing of tiny parts, thin edges, and precise positioning that standard diffused IR sensors miss.
• Rugged Industrial Housing: Heavy-duty threaded galvanized brass body provides mechanical strength, vibration resistance, and corrosion protection on production lines.
• Wide Voltage Range: Operates from 6V to 36V DC, ensuring compatibility with 12V vehicle electronics and standard 24V industrial PLC inputs.
• High Ambient Light Immunity: Internal optical filtering and modulation reject false triggers caused by factory fluorescent lighting, overhead LEDs, and sunlight.

Common Applications

• Conveyor Belt Counting & Bottling: Precision piece counting, bottle jam detection, and packaging verification over wide machinery spans.
• Perimeter Security & Tripwires: Invisible or visible laser barrier trip lines for entry gates, automated doors, and hazardous machine exclusion zones.
• Elevator & Crane Positioning: Overhead travel limits, carriage alignment, and height-clearance verification in warehousing.
• Automated Parking Systems: Vehicle presence verification and gate control in multi-level parking ramps.

Usage Tips

• NPN Output Interfacing: The black output wire is an open-collector NPN transistor that switches to ground (0V). When connecting to a 5V microcontroller (e.g., Arduino) or 3.3V logic (ESP32/Raspberry Pi), enable the MCU internal pull-up resistor or add an external 4.7kΩ to 10kΩ pull-up resistor between the signal line and your logic VCC rail.
• Rigid Alignment: Over distances exceeding 10 meters, minute angular shifts will throw the laser spot off the receiver aperture. Ensure both transmitter and receiver are bolted to vibration-free structural framing.
• Eye Safety: Never look directly into the laser emitter aperture or point the beam toward reflective glass surfaces where redirected beams could cause ocular hazards.