The Optex OA-203C is the optimal choice for both safety and activation on all types of automatic doors. It combines easily adjustable settings with a slim design, providing maximum safety in a wide array of applications.

Easy Installation

The Optex OA-203C is simple to install. All the settings are mechanically adjustable with dipswitch and levers.


Safety is assured by the two rows of presence detection closest to the door. The sensor detects a person or object and holds the door open as long as they are in the threshold area, even if they stop or pause.


A very compact and slim design, available in three colors: black, silver and white.

All conditions

Snow mode and variable sensitivity adjustments make this sensor suitable for every application and even extreme weather conditions.


Optex automatic door sensors guarantee premium performance and include a 3-year full replacement warranty.


Order the OA-203C


Model OA-203C
Mounting height max. 3.0 m (9’10”)
Detection area adjustments Eliminate rows B, C, or D (dipswitch setting) Depth 4° in or out, 1° per setting Width 7° left or right, 3,5° per setting Shutters eliminate left and right sides
Detection technique Active infrared reflection
Power supply 12-30V AC/DC
Power consumption 160mA max. (at 12V AC)
Power/Operating indicator Green: Stand-by Red: Presence detection Oranje: Motion detection
Output contact “Form C”-relay 50V, 0.3A max. (resistance load)
Relay hold time Approx. 0.5s
Response time < 0.3s
Operating temperature -20ºC – +55ºC
Outer dimensions 221 x 63 x 29.9 mm (w x h x d)
Weight 200g
  • 3 m connection cable with plug
  • 2 mounting screws
  • 1 mounting template
  • area adjustment tool
Available colours Black (OA-203CBL), silver (OA-203CS) and white (OA-203CW)


Mounting Height A 2.20 2.50 2.70 3.00
Area Depth B (Presence Detection) 0.31 0.35 0.38 0.41
Area Depth C (Presence Detection) 0.75 0.85 0.92 1.02
Area Depth D (Motion Detection) 1.30 1.48 1.59 1.77
Area Width E 2.30 2.60 2.80 3.10
Distance to mounting surface F 0.18 0.20 0.22 0.25

The actual detection area may differ according to the size/material entry speed of the object and the installation environment.

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