Smoke detector ORS 142 SP

Hekatron ORS 142 SP – Optical Smoke Detector for Special Applications

The Hekatron ORS 142 SP (31-5000018-01-03) is an optical smoke detector specifically designed for demanding special applications. It is particularly suitable for wind turbines, technical installations and industrial monitoring systems where reliable smoke detection and detailed evaluation of detector conditions are required.

Unlike the standard ORS 142, the ORS 142 SP features a pulsed, potential-free relay output. Different pulse frequency patterns allow a connected control or monitoring system to identify and evaluate individual operating conditions. A multicolour LED additionally provides local visual status indication.

Reliable Smoke Detection and Intelligent Condition Monitoring

The ORS 142 SP operates according to the proven optical scattered-light principle, enabling early detection of both smouldering and open fires producing smoke. An automatic detector self-test and continuous monitoring of the sensing chamber support reliable operation.

Integrated contamination compensation continuously adjusts the alarm threshold over time, helping to maintain consistent smoke detection performance as the sensing chamber becomes contaminated.

Key Features

• Designed for special applications, particularly wind turbines
• Optical smoke detection using scattered-light technology
• Pulsed relay output with distinct frequency patterns for condition monitoring
• Multicolour LED indicating operating, alarm and fault conditions
• Automatic detector self-test and sensing chamber monitoring
• Intelligent contamination compensation with automatic alarm threshold adjustment
• Detection of minor and severe contamination
• Integrated temperature monitoring with overtemperature fault indication
• Extended operating temperature range from -30 °C to +60 °C
• Automatic return to normal operation when smoke levels fall below the alarm threshold
• Replacement indication after 8.2 years

Technical Specifications

• Manufacturer: Hekatron
• Model: ORS 142 SP
• Part number: 31-5000018-01-03
• Detection principle: Optical scattered-light technology
• Smoke response: Based on EN 54-7
• Operating voltage: 18–28 V DC
• Current consumption at 28 V DC: max. 27 mA (standby), 12 mA (alarm), 29 mA (fault)
• Relay output: Potential-free, pulsed
• Switching voltage: max. 30 V DC
• Switching current: max. 1 A
• Switching capacity: max. 30 W
• Protection rating: IP42
• Operating temperature: -30 °C to +60 °C (non-condensing)
• Dimensions with base: Ø 80 × 66 mm
• Weight: approx. 120 g
• Housing material: Lexan 141
• Colour: White, similar to RAL 9010

Installation and Important Notes

The detector is installed by inserting it into a compatible Hekatron Series 143 mounting base. The mounting base is not included and must be ordered separately.

Important: The ORS 142 SP is a special version with a specific relay signalling function. Compatibility with the intended control and monitoring equipment must be verified before installation. Evaluation of the pulsed relay signals requires a suitable control unit.