HEKATRON ORS 142 K Optical Smoke Switch for Duct Monitoring (5000558-0201)

Detects smoke in ventilation and air conditioning ducts using the optical scattered light principle, triggering a potential-free changeover relay for alarm and fault signaling.

Overview

The HEKATRON ORS 142 K is an optical smoke switch designed for monitoring air ducts. It operates on 18–30 V DC and provides separate alarm and fault relay outputs. The multi-color LED indicates operation, alarm, and fault status. Housed in ABS plastic, it offers IP54 protection with appropriate cable glands and connects via screw terminals up to 2.5 mm².

What stands out

• Optical scattered light detection for early smoke recognition
• Two potential-free changeover contacts: alarm and fault
• Wide operating temperature range: -20 °C to +60 °C
• VdS approved (G201006) for reliable performance

Technical details

• Supply voltage: 18 V to 30 V DC
• Standby current: approx. 10 mA
• Alarm current: approx. 20 mA
• Alarm contact rating: max. 30 V DC / 1 A; max. 250 V AC / 0.5 A
• Fault contact rating: max. 30 V DC / 1 A; max. 250 V AC / 0.5 A
• Operating temperature: -20 °C to +60 °C
• Storage temperature: -25 °C to +75 °C
• Humidity: 0 to 95 % RH, non-condensing
• Protection class: IP54 (with appropriate cable glands)
• Housing material: ABS plastic
• Connection: screw terminals, max. 2.5 mm²
• Reset function: automatic or manual via external control unit
• Approvals: VdS G201006, CE

Our verdict

A robust and approved duct smoke switch for ventilation systems, offering clear status indication and reliable relay outputs.