Linear Heat Sensing Cables (LHS cables)

Linear Heat Detection Cable consists of a twisted pair of extremely low resistance tri metallic conductors, coated in advanced temperature-sensitive thermal polymers which are chemically engineered to break down at particular fixed temperatures allowing the twisted conductors to make contact and initiate an alarm at the control panel. This linear cable can detect a fire anywhere along its entire length.

The proper temperature model must be chosen to provide the fastest alarm response to a potential fire condition without creating false alarm conditions as it's a co-axial cable that exerts a defined change in electrical resistance of internal polymer when subjected to changes in surface temperatures. Fault indication of open and short circuit conditions on the sensor cable can be provided by system monitoring through an associated electronic interface unit.

Specification

• Construction: Dual Insulated, twisted pair tri-metallic cores
• Insulation: 1.1 Kv tested Advance Thermal Polymers
• Overall Armouring (Optional): Stainless steel wire braiding
• Wire Overall Diameter: 3.60 mm (Approx)
• Minimum Bending Radius: 50 mm > 0 Deg C,  100 mm < 0 Deg C
• Ambient Temperature: -68 °C to 78 °C version, -88 °C to 105 °C version
• Maximum Rated Voltage: 30 Vac /42 Vdc
• Resistance: 100 Ohm/Km
• Maximum Zone Length: 3000 mtr
• Capacitance: 88-150 pF/mtr
• Inductance: 540-1050 H/mtr
• Outer Color: Red for 68 °C,  Yellow for 78 °C,  Light Green for 88 °C, Dark Green for 105 °C
• Available: 200 / 300 / 500 Mtr Lengt