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S4A021 Automatic Door Wireless Mini Infrared Sensor

Wireless Active Infrared Technology: Operates on a 433.92MHz frequency with up to 10m wireless transmit distance, eliminating complex wiring.
Independent Battery Powering: Sensor operates on a standard 6F22 9V battery for long-lasting, wire-free deployment.
Adjustable Detection Angle (0° to 25°): Allows fine-tuning of the detection field (far or near) up to a maximum mounting height of 2.6m.
Versatile Output Signal: Provides selectable NO/NC (Normally Open / Normally Closed) relay signal outputs for flexible system integration.
Universal Receiver Power Input: Receiver operates on standard AC/DC 12–24V power supplies for quick setup with automatic door operators.
  • Brand:

    S4A
  • Item NO.:

    S4A021
  • Specifications
  • Wiring Diagram
  • Package

S4A021 Automatic Door Wireless Mini Infrared Sensor


The S4A021 is a high-performance wireless active infrared sensor set designed for automatic door systems. Powered by a standard 6F22 9V battery and operating on a 433.92MHz transmission frequency with up to 10m wireless range, it offers clean, cable-free installation without complex wiring. Featuring an adjustable detection angle (0°–25°), selectable NO/NC relay output, and universal 12-24V AC/DC receiver power input, it provides reliable and responsive door activation for commercial and residential entrances.


Parameter Specification
Model S4A021
Sensor Type Wireless Mini Infrared Sensor
Technology Active Infrared Scanning
Battery Specification (Sensor) 6F22 9V
Transmission Frequency 433.92MHz (Optional) / 315MHz
Wireless Transmit Distance 10m (Up to 15m)
Mounting Height Max 2.6m
Adjustable Angle Far or near 0° ~ 25°
Relay Output NO / NC (Normally Open / Normally Closed)
Power Input (Receiver) AC/DC 12~24V (Support 12V~36V)
Scanning Area 100 x 80 mm
Maximum Sensing Distance 1000 mm
Standby Current <80 μA
Dynamic Current 13 mA / 80 mA
Contact Rating / Capacity 20A DC 14V
Outer Covering Material ABS Plastic
Dimensions (L*W*H) 63 x 57 x 52 mm / 123 x 50 x 32 mm
Available Colors Black
Application Scope Hotels, Buildings, Offices, Malls, Hospitals, Warehouses, Corridors

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If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.

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