Products for USB Sensing and Control
Products for USB Sensing and Control

Autonics PR12-4DN Inductive Proximity Sensor - 4mm

ID: 3526_0

This inductive sensor can detect metallic objects within 4mm and behaves like a switch that connects to a digital input.


Proximity sensors are the most common and affordable solution for no-touch object detection. The most commonly-used proximity sensor is the inductive type, which generates an electromagnetic field to sense metal objects passing close to its face. This is usually the easiest sensing technology to apply in applications where the metal object to be detected is within an inch or two of the sensor face.

Note that the standard detecting distance is based on a standard shape approaching the sensor in a standard way. The real detecting distance will vary depending on the shape, thickness and type of metal being detected and will in general be between 70 to 80% of the standard distance.

Comes packaged with

  • Mounting Hardware Kit

Product Specifications

Sensor Properties
Detecting Distance Max 4 mm
Setting Distance Max 2.8 mm
Sensor Type Proximity (Inductive)
Sensor Output Switch Type Normally Open
Detection Hysteresis Max 10 %
Sensor Response Time Max 2.5 ms
Electrical Properties
Supply Voltage Min 12 V DC
Supply Voltage Max 24 V DC
Current Consumption Max 10 mA
Protection Circuitry Reverse Polarity, Surge, Overload and Short-Circuit
Physical Properties
Cable Length 2 m
Material ABS Resin / Metal
Operating Indicator Red LED
IP Rating IP67
Operating Temperature Min -25 °C
Operating Temperature Max 70 °C
Operating Humidity Min 35 %RH
Operating Humidity Max 95 %RH
Customs Information
Canadian HS Export Code 8536.50.00
American HTS Import Code 8536.50.90.65
Country of Origin CN (China)
This sensor connects to any device with a Digital Input.

This is how you connect the 3526 to a Phidget board that does not have 12V power such as the 1018, 1012, 1202, and 1203 using our 12VDC Power Supply:

  • Connect the +12 wire from the Power Supply (that's the one with the white line) to the 3526 Brown wire.
  • Connect the 3526 Black wire to a Digital Input on the 1018.
  • Connect the Power supply Ground Wire and the 3526 Blue wire to the Digital Input Ground connector on the 1018.

Note: When the 3526 is connected to a 1012, it will behave as a Normally Closed (NC) sensor instead of Normally Open (NO).

The 3526 can also be used with the 1144 - 12V Sensor Adapter if you want to connect to a device with an analog input without worrying about providing a 12V power supply.

For boards that have power input, if the supplied power is within 12-24VDC, the +V line can be connected to the terminal block, powering the sensor from the Phidget. The 1019, 1073, and 1063 all accept external power.