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Omron E3FB-DP22 photoelectric sensor — front face with red LED indicator and 18mm threaded brass body

Omron E3FB-DP22 — M18 Diffuse Sensor, 300mm, PNP

SKU: E3FB-DP22

USD 22.00

Omron E3FB-DP22 is an M18 brass-bodied diffuse-reflective photoelectric sensor with 300mm sensing distance, PNP output, M12 connector, and IP67 rating for harsh industrial environments.

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Product Overview

The E3FB-DP22 is the 300mm diffuse-reflective variant in Omron's E3FB family of M18 threaded photoelectric sensors. The 'E3FB' code marks the family: F = full nickel-plated brass body (vs the E3FA plastic), B = standard cylindrical axial (vs E3RB side-view). The 'D' is diffuse-reflective, 'P' is PNP output, '2' is 300mm range, and '2' is the M12 connector. Diffuse-reflective means the sensor has both emitter and receiver in the same housing; it detects light reflected back from the target. This makes it ideal for short-range part detection on conveyors, in feeders, and at machine stations. The 300mm range is the most common spec for OEM machines — close enough for precise detection of small parts, far enough to mount the sensor away from the target zone. The brass housing matters more than it sounds. Plastic-bodied sensors (E3FA) are fine for clean panels and indoor equipment. The E3FB brass housing survives: - Coolant and cutting fluid splash in machining cells - Solvent and cleaning chemical exposure in food/pharma - Mechanical impact from dropped tools or parts - Thermal cycling from 0°C to 70°C without warping The IP67 rating means the sensor is dust-tight and survives temporary immersion. For washdown or outdoor installations, the E3FB is the right pick over the E3FA. On the wiring side, the M12 connector is the 4-pin industrial standard. PNP output sources current on the output line — connects to a PLC input configured for sinking (the standard for Omron CP1, CJ2, NX, NJ). The Light-ON/Dark-ON mode is set by the wiring of pin 2 (input): connecting pin 2 to 24V sets Light-ON (output active when target is present), connecting to 0V sets Dark-ON. The 0.5ms response is fine for most conveyor and feeder applications; for high-speed (>1 kHz) part counting, look at the E3FB-LP[] series with 0.1ms response. The M18 threaded body with two knurled nuts makes panel mounting simple: drill an 18mm hole, drop the sensor through, tighten the nuts. No bracket required for most installations. The 4-pin M12 pigtail cable (e.g., XS2F-D421-D80-F for 2m, or XS2F-D421-G80-F for 5m) plugs into the back. Common use: detecting part presence on a vibratory feeder bowl, confirming cap orientation on a bottle line, end-of-stroke detection on a pneumatic cylinder, counting parts in a small parts handling cell. The brass housing makes the E3FB the right pick for any cell with coolant, oil, or cleaning chemicals.

Key Features

  • Sensing Range: Up to 100mm
  • Output Type: PNP
  • Supply Voltage: DC12-24V
  • Response Time: 1ms
  • Light Source: Red LED
  • Protection: IP67/IP69K
  • SKU: E3FB-DP22
  • Series: E3FB
  • Voltage: 24V

Best-Fit Applications

  • Detecting part presence on a vibratory feeder bowl in electronics assembly cells
  • Confirming cap orientation on a bottle line in food and beverage packaging
  • End-of-stroke detection on pneumatic cylinders in pick-and-place machines
  • Counting parts in a small parts handling cell with 300mm stand-off distance

Buying Checklist

  • Nickel-plated brass housing survives coolant, solvent, and impact that destroys plastic sensors
  • M18 threaded body with knurled nuts — simple panel mounting without brackets
  • PNP output matches modern Omron PLCs with sinking inputs
  • IP67 rating handles washdown and outdoor installations
  • Light-ON/Dark-ON mode set by simple wire connection, no programming or teach button

Technical Specifications

Model E3FB-DP22
Series E3FB
Type Diffuse Photoelectric Sensor
Sensing Range Up to 100mm
Output Type PNP
Supply Voltage DC12-24V
Response Time 1ms
Light Source Red LED
Operating Temperature -25 to +55°C

FAQ for E3FB-DP22

What's the difference between E3FA and E3FB?
E3FA is plastic (ABS) housing; E3FB is nickel-plated brass housing. Same optics, same electronics, same M18 thread. The E3FB is the right pick for harsh environments (coolant splash, solvent exposure, food-grade washdown); E3FA is the value pick for clean panels and indoor OEM machinery. Price difference is small (~$10-15 per unit).
What's the difference between E3FB-DP22 and E3FB-DP12?
E3FB-DP22 is 300mm sensing distance with M12 connector; E3FB-DP12 is 100mm sensing distance with M12 connector. Choose the 100mm version when the target is small (screw head, small component) and you need precise detection close-up. Choose the 300mm version for general-purpose part detection at typical machine distances.
How do I set Light-ON vs Dark-ON on the E3FB-DP22?
Pin 2 of the M12 connector controls the mode. Connect pin 2 (blue wire on standard XS2F cable) to 24V for Light-ON (output active when target is present, beam unbroken). Connect pin 2 to 0V for Dark-ON (output active when target is absent, beam broken). For most applications, Light-ON is the intuitive choice — output ON when you can see the part.
Can I use E3FB-DP22 with a PNP-input PLC?
Yes — the E3FB-DP22 has PNP output, which sources current on the output line. It connects directly to any PLC input that accepts PNP/sourcing signals. Most modern PLCs (Omron CP1, CJ2, NX, NJ) accept PNP by default. For older PLCs that only accept NPN, use the E3FB-DN22 (NPN output, same 300mm range).

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