Linear Sensor Wire

Linear Sensor Wire uses linear thermal detection technology to identify fire conditions in the areas where it is installed. The system operates by fastening the thermal wire directly onto surfaces that require fire protection. When a fire occurs, detection is achieved through physical temperature response along the cable.

Fire detection typically occurs within 10 to 40 seconds, depending on fire magnitude, fire class, and ignition location. When the ambient temperature reaches 180°C, the wire structure begins to deteriorate: the outer layer melts, the internal conductors come into contact, and a fire alarm signal is transmitted to the control unit.

This operating principle ensures reliable detection in environments where traditional point detectors or optical systems may be insufficient.

Linear Heat Sensor Wires (LHSW) are designed to detect temperature changes along a continuous line, making them ideal for fire detection in extended or high-risk areas.

The sensor relies on a change in electrical resistance that occurs when conductive elements approach their melting point. This physical response enables early fire detection and supports safer intervention, particularly in large industrial facilities and critical infrastructure.

Linear Sensor Wires are commonly used as:

• A standalone fire detection solution

• A complementary system alongside flame or smoke detectors

Linear Sensor Wire can be used in a wide range of applications, including:

• Fire detection systems in buildings and facilities

• Industrial environments (pipelines, electrical panels, machinery)

• Fire prevention systems for overheating detection

• Cooling system temperature monitoring

• Security systems requiring thermal anomaly detection

They are particularly effective in high-risk areas where early warning and continuous coverage are critical.

Linear heat sensors are designed to detect temperature changes along fixed lines over extended distances. Common types include:

Thermistor Linear Sensors
Use metal oxides to measure resistance changes caused by temperature variation.

Platinum RTD Linear Sensors
Utilize platinum wires for high accuracy and stable temperature measurement.

Fiber Optic Linear Sensors
Measure temperature using optical fiber technology, suitable for specialized applications.

Bimetallic Linear Sensors
Use thermally sensitive metal elements that deform with temperature change and trigger an electrical signal.

The selection depends on environmental conditions, accuracy needs, and system design requirements.

• Continuous temperature detection along the entire cable length

• Detection over long distances

• Fixed-line installation capability

• High sensitivity and stable performance

• Fast response to abnormal heat rise

• Wide operating temperature range

• Durable construction for harsh environments

• Simple installation and maintenance-free operation

Linear Sensor Wire systems are evaluated according to recognized fire detection and safety standards, including:

• EN 54-5 – Fire detection and alarm systems (EU)

• FM Approval Standard – Global fire protection certification

• UL 521 – Heat detector performance testing (USA)

• BS 5839 – Fire alarm system standards (UK)

These standards ensure the sensor’s reliability, sensitivity, and environmental durability.

A Linear Sensor Wire continuously monitors temperature along a fixed path. When the temperature exceeds predefined alarm levels, it activates the fire alarm system and provides early warning before the fire escalates.

Its main functions include:

• Detecting abnormal temperature rise

• Providing early fire warning

• Supporting rapid intervention

• Protecting infrastructure and equipment

Linear Sensor Wires are widely used as an effective alternative or complement to traditional fire detection systems.