Description
The Protectowire PHSC-190-LSZH-M-500 is a fixed-temperature digital linear heat detector designed to initiate an alarm at 190°F (88°C). It provides continuous line-type heat detection with point sensitivity along the entire cable length.
This model features a Low Smoke Zero Halogen (LSZH) outer jacket suitable for commercial and industrial applications where reduced smoke and halogen emissions are required. The “-M” suffix designates a factory-installed high tensile strength 316 stainless steel messenger wire, wound around the detector at approximately one turn per foot, simplifying suspended installations where direct mounting is not practical.
Per the manufacturer’s messenger wire data sheet (Page 1), maximum detector run length between turnbuckles must not exceed 250 ft (76 m), and intermediate supports are required at 15–50 ft intervals, never exceeding 50 ft. Outdoor installations require closer support spacing due to environmental loading.
The “-500” suffix indicates a 500 ft cable length. The model is UL/cUL listed for spacing up to 50 ft and FM Approved for spacing up to 30 ft at the 190°F rating.

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