Inductive Sensor M5, NPN NO, Flush - DW-AS-621-M5

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100.00 Grams


Contrinex proximity sensor M5, NPN NO - DW-AS-621-M5

Embeddable (flush), M8 3-pin, 1.5 mm Sensing distance

The Contrinex proximity sensor DW-AS-621-M5 features outstanding noise protection and stable sensing performance due to its specialized sensor IC developed by Contrinex. This sensor comes in a round cylindrical shape, sensing distance of 1.5mm, sensing side diameter and housing size of M5, and shield (flush) installation. The standard cylindrical inductive sensor can be used in diverse applications requiring non-contact detection of metallic objects.

As a quick report, this inductive proximity sensor provides:

  • 5 mm sensing side diameter
  • NPN Normally Open control output
  • 1.5 mm sensing distance
  • Embeddable (flush) installation
  • Long life cycle and simple operations
  • protections against short-circuits, induced overvoltages, and power supply reversal built-in
  • IP67 ingress protection structure according to IEC standards
  • Red LED status indicator


This Contrinex proximity sensor's case and nut parts are made of Stainless-steel V2A and its sensing side is made of POM.

The DW-AS-621-M5 features IP67 ingress protection.

The LED on its body acts as the process indicator.


The Contrinex M5 flush proximity sensor DW-AS-621-M5 features a potted connector S8 connection. It is a 3-pin M8 electrical connection.

Sensing specifications

This inductive sensor's sensing side diameter is 5 mm. This sensor's maximum distance to detect its standard sensing target, which is a 5x5x1 mm piece of iron, is 1.5 mm. This so-called sensing distance differs from one sensing target to another, based on their material, size, etc. You could find out the sensing distance in Contrinex proximity sensors with a correction factor, mentioned in their datasheet.

This M5 flush proximity sensor also features 0.03 mm repeat accuracy.

Control output

The DW-AS-621-M5 features NPN Normally Open control output. NPN stands for Negative-Positive-Negative transistors.


The ambient temperature range that the DW-AS-621-M5 M5 flush proximity sensor works properly in is -25 … 70°C.

Industries / applications:

  • Tool selection automated production lines
  • Robotic position-sensing
  • Control of micro-mechanisms

Series Information

Miniature Proximity sensors

When you’re selecting a sensor for position sensing, the size of the sensor is an important issue to consider. Miniature series of inductive sensors from Contrinex meets this constraint without compromising on functionality. These sensors are the smallest inductive sensors on the market.

Sensors from this range use either conventional Classics, or advanced Extra Distance or Full Inox technology. An IO-Link interface is also available for communication in PNP NO versions. Available in plain and threaded sizes from Ø 3 to M5 and as a 5 mm square-section type, Contrinex miniature proximity sensors are ideal for applications where space is limited.

Miniature Sensors Main features

  • Smallest self-contained miniature proximity sensors on the market
  • Sensing range up to 2.5mm

About Contrinex proximity sensor

Contrinex is a leading manufacturer of sensors for factory automation. The Swiss company has a unique and innovative range of products whose features far surpass those of standard sensors. This company represents 14 proximity sensor series:

  • Basic
  • Miniature
  • Extreme
  • Analog output
  • 2-wire
  • Extra Pressure up to 200 bar
  • High Pressure up to 1000 bar peak
  • Extra Temperature up to 120°C
  • High Temperature up to 230°C
  • Weld-immune
  • Chip-immune
  • Double-Sheet
  • Maritime
  • Washdown

Contrinex products are mainly used in:

  • Automotive industry
  • Filling machines
  • Food/Beverage industry
  • Green Energy and Environment
  • Logistics
  • Machine Tools
  • Mobile equipment
  • Packaging industry
  • Robotics
  • Special purpose machines
  • Textile Industry


You may be interested to see the Contrinex M5 flush proximity sensor's catalog. If so, please click to view the DW-AS-621-M5 datasheet.
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Warranty Information

One Year Warranty.
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Additional Information

Operating distance Sn:
1.5 mm
Housing size [mm]:
Normally open (NO)
Standard output
M8 3-pin
Supply voltage:
10...30 VDC
Switching frequency max. [Hz]:
Housing material:
Stainless-steel V2A
Enclosure rating (IP):
IP 67
Operating pressure [bar]:
≤ 1 bar
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