Atex Photocell

The MFZOvitor Special Reflex Photocell 24V is an explosion-proof reflective photoelectric sensor designed for safe operation in hazardous environments. Built with intrinsically safe “Ex ia” protection, it ensures that electrical energy levels remain low enough to prevent ignition, even under fault conditions.

This reflective light barrier system consists of a transmitter/receiver unit and reflector, allowing reliable detection of objects or interruptions without requiring a separate receiver unit. The front-mounted configuration simplifies installation and alignment in industrial door applications.

Key Features

• 24 V AC/DC operation (industry standard)
• Retro-reflective design (single-sided wiring)
• Infrared safety beam (invisible detection field)
• Automatic stop/reverse function when beam is broken
• Compact housing with alignment LEDs
• Weather-resistant for outdoor use
• Compatible with most gate/door controllers

Technical Specifications

(Consolidated from Marantec-type units + verified equivalents)

How It Works

• The photocell emits a polarized infrared beam
• The beam reflects off a mirror/reflector
• The receiver (same unit) monitors the returned signal
• If the beam is interrupted → system triggers safety stop/reverse

This is different from dual-beam systems, which require wiring on both sides.

Typical Applications

• Automated garage doors
• Industrial roller shutter doors
• Sliding & swing gates
• Access control barriers

In systems like Marantec, these are used to:

• Prevent closing on vehicles or people
• Meet safety compliance requirements

Safety Function

• Creates an invisible safety curtain across the opening
• If interrupted:
  • Door stops immediately
  • Or reverses (depending on controller logic)

This is considered a primary safety device, but often used alongside:

• Safety edges
• Loop detectors

Reflex vs Standard Photocells

The sensor is commonly used in ATEX-certified door systems to provide safety monitoring, obstruction detection, and automated control functions. It integrates seamlessly with explosion-proof control panels and operators from MFZOvitor / Marantec.