Talentum IR2 Flame Detector (Ex d)

FAQs

What hazardous area zones is the Talentum IR2 Ex d approved for?

The detector is certified for Zone 1, 2, 21 and 22 hazardous areas. It carries ATEX certification as Category II 2 G D equipment and CENELEC/IEC approval as Ex db IIC T4 Gb (for gas) and Ex tb IIIC T135°C Db (for dust). This means it provides high-level protection suitable for areas where explosive atmospheres are likely to occur.

What is the detection range of the IR2 Ex d?

The detector offers two sensitivity settings: High sensitivity (Class 1) can detect a 0.1 m² n-heptane fire at 25 meters, while Low sensitivity (Class 3) can detect the same fire size at 12 meters. The device has been tested and approved at Class 1 performance level according to EN54-10 standards.

Can the detector operate in contaminated environments?

Yes, the IR2 Ex d is specifically designed to maintain detection capability even when the lens is contaminated by layers of oil, dust, water, vapour or ice. The detector is tolerant of fumes, vapours, dust and mist, making it particularly suitable for harsh industrial applications.

What types of flames can the detector identify?

The detector can identify almost all flame types, including visible hydrocarbon fires with 4.3 μm emissions and invisible fires such as hydrogen. It has been tested and approved for detection of both yellow flames (n-heptane) and clear flames (methylated spirit), demonstrating proven response to multiple fuel types.

How does the detector avoid false alarms?

The IR2 Ex d uses two IR sensors that respond to different infrared wavelengths (1.0 to 2.7 μm) to discriminate between genuine flames and spurious radiation sources. False alarms from flickering sunlight are avoided through a combination of optical filters and advanced signal processing techniques. The detector specifically responds to the low frequency flickering (1-15 Hz) characteristic of flames.

What output options are available?

The detector offers selectable output options as standard, including programmable relay contacts (rated at 48 Vdc, 0.75 A, 30 W for resistive loads) or 4-20 mA current loop signal. Relay operation can be configured for latching or non-latching behavior to suit different system requirements.

What power supply does the detector require?

The IR2 Ex d operates from a 14 to 30 VDC supply. Current consumption is low: 3-8 mA in quiescent mode (depending on relay configuration) and 9-28 mA during alarm conditions. The 24 Vdc supply line should be fused at 1 A.

What maintenance is required?

Regular maintenance checks should be performed at least annually, with frequency determined by environmental conditions. Maintenance includes cleaning external surfaces to prevent dust accumulation, checking flame path threads for corrosion, and verifying proper operation through built-in test functions. The detector features both automatic and manual test capabilities.

What cable glands should be used for installation?

For Zone 1, 2, 21 and 22 hazardous areas requiring IIC apparatus, Ex d barrier glands are mandatory. For Zone 2 and 22 areas requiring IIA and IIB apparatus, any Ex d gland is permitted. Cable glands must be certified and approved to meet EN 60079-14 standards, and should have IP66 rating or higher to maintain the enclosure’s IP rating.