AP Sensing

AP Sensing's fiber optic Linear Heat Detection (LHD) uses one single, passive fiber optic sensor cable to detect changes in temperature along an important piece of infrastructure. The result is a continuous temperature profile along the entire length of the sensor cable, providing gapless monitoring and complete asset coverage. Unlike conventional fire detection systems, fiber optic LHD detects and locates hotspots and fires quickly and precisely, tracking fire size and spread direction regardless of air currents.  LHD enables early identification of rate of heat rise and therefore detects heat abnormalities earlier than other technologies.

This technology is used in a wide range of applications including:

• Traffic and metro tunnels
• Car parks
• Conveyor belts
• Cable trays
• Solar Farms
• Battery storage
• Chemical plants
• Coal storage facilities

Our system has a very low false alarm rate, with the industry’s most complete set of certifications (VdS EN 54-22, UL521, ULC S530, FM 3210, ATEX II(1) GD M2, KFI, CCC, SIL2). It can withstand temperatures up to 750 °C without losing monitoring capabilities and is well suited for hazardous environments, offering maximum reliability under severe conditions including explosive environments (ATEX/IECEx-certified), dusty and corrosive atmospheres, high humidity and extreme temperature changes, and electromagnetic interference (EMI).