Panasonic EX-21A-PN Through-Beam Photoelectric Sensor

USD 104.16

Ultra-compact through-beam photoelectric sensor with 1m sensing range, PNP output, Light-ON mode, Red LED, and IP67 rating. Operates on 12-24VDC.

SKU Pananonic-EX-21A-PN Category
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Panasonic EX-21A-PN Through-Beam Photoelectric Sensor

Model Identifier EX-21A-PN
Official Part Number EX-21A-PN
GTIN Standard NA

Technical Overview

Ultra-compact through-beam photoelectric sensor with 1m sensing range, PNP output, Light-ON mode, Red LED, and IP67 rating. Operates on 12-24VDC.

Key Features

  • Ultra-compact design with 4.5mm thickness, 18mm height, and 16mm width.
  • Through-beam sensing method for reliable detection.
  • 1 meter (39.4 inch) sensing distance.
  • Fast response time of 0.5 ms.
  • PNP open collector output configuration.
  • Light-ON operation mode.
  • Red LED light source for easy alignment.
  • IP67 ingress protection for harsh industrial environments.
  • Equipped with a 2-meter connection cable.
  • Wide operating temperature range of -25°C to 55°C.
  • Detects objects as small as Ø2.6mm.
  • Made with polyethylene terephthalate enclosure and polyalylate lens.

Operates on 12-24 VDC with a low current consumption of 10 mA or less, featuring a PNP output and Light-ON operation mode via a 2-meter connection cable.

Technical Specification Matrix

ParameterValue
Sensing MethodThrough-Beam
Sensing Distance1 m
Supply Voltage12 to 24 VDC (Min 10.8 V, Max 26.4 V)
Current Consumption10 mA or less
Response Time0.5 ms
Output ConfigurationPNP Open Collector
Operation ModeLight-ON
Light SourceRed LED
Ingress ProtectionIP67
Operating Temperature Range-25°C to 55°C
Connection MethodCable (2 m length)
Minimum Detectable ObjectØ2.6 mm
Construction MaterialPolyethylene Terephthalate enclosure, Polyalylate lens
Physical Weight (kg)0.02
Dimensions L x W x H (cm)1.6 x 0.45 x 1.8

Industrial Applications

1. Precision Part Counting on Conveyors

This sensor can be used in automated assembly lines or packaging systems to accurately count small components as they pass on a conveyor belt. Its ultra-compact size allows for integration into tight spaces, and the 1-meter through-beam detection ensures reliable counting without interference from ambient light.

Problem Solved

Accurate and reliable counting of small or irregularly shaped parts in high-speed production environments, preventing over- or under-packaging.

Through-Beam1m Sensing RangeØ2.6mm Min Detectable Object0.5ms Response TimeUltra-compactIP67

2. Small Object Presence Detection in Robotic Grippers

Integrated within the tooling of robotic grippers, the EX-21A-PN can confirm the presence or absence of small objects before or after a pick-and-place operation. Its miniature dimensions (4.5mm thickness) are critical for fitting into confined robotic end-effectors, while the PNP output provides direct compatibility with PLC inputs.

Problem Solved

Ensuring proper gripping and transfer of miniature components by robots, preventing errors caused by missing or misaligned parts, thereby improving automation reliability.

Ultra-compact4.5mm ThicknessPNP Output12-24VDC0.5ms Response Time

3. End-of-Travel Sensing for Miniature Actuators

The EX-21A-PN can serve as a precise end-of-travel sensor for miniature linear actuators or slides in compact machinery. Its robust IP67 rating ensures durability in environments where dust or splashes might occur, and the fast response time guarantees accurate positional feedback even during rapid movements.

Problem Solved

Providing reliable and precise positional feedback for compact automation mechanisms, crucial for preventing overtravel and ensuring accurate machine sequencing.

End-of-Travel SensorUltra-compactIP670.5ms Response Time12-24VDCPNP Output
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