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Digital linear heat detection 
by Protectowire

Standard Digital (PHSC)

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The Standard Digital Protectowire Heat Sensitive Cable (PHSC) Linear Heat Detector can best be described as a continuous run of spot heat detectors. It is capable of sensing heat anywhere along its length and initiates an alarm once its fixed activation temperature is reached.

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The Standard Digital (PHSC) Linear Heat Detector works in the following manner. Once the ambient temperature meets or exceeds its fixed temperature, the heat sensitive polymer weakens, which in turn allows the twisted spring steel conductors to make contact, which results in an electrical short that triggers an alarm signal.

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The Standard Digital (PHSC) Linear Heat Detector is designed to be used on a compatible fire alarm control module or panel.

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All Protectowire Linear Heat Detectors must be installed in accordance with applicable sections of NFPA 72 or as required by the local AHJ.

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Unique advantages of Protectowire Linear Heat Detectors include:

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  • Detects heat at any point along its length

  • Low maintenance

  • Outer jackets resist corrosion, chemicals, moisture, and extreme temperatures

  • Can be installed close to hazards to provide rapid response

  • Long service life

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  • What is the primary difference between Protectowire PHSC and PLR Digital Linear Heat Detectors?

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Protectowire PHSC series is manufactured using spring steel conductors, while the PLR series is manufactured with low resistance tri-metallic conductors that are engineered to enable longer detector zone lengths on other manufacturers' control equipment. The amount of Protectowire (PHSC or PLR series) that can be installed on another manufacturers' control equipment is directly determined by the maximum loop resistance of the equipment’s initiating device circuit. Protectowire’s PHSC digital linear heat detectors have an approximate resistance of 0.185 Ohms per foot (0.607 Ohm per Meter). Protectowire’s PLR digital linear heat detectors have an approximate resistance of 0.058 Ohms per foot (0.191 Ohm per Meter). The PLR series detectors allow for approximately 3x longer lengths on the same initiating device circuit.

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  • Can Protectowire Linear Heat Detectors with different alarm temperature ratings be installed in the same zone?

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Yes. Protectowire offers two series of detectors capable of supporting different activation temperatures on the same series initiating device circuit. This allows a single Protectowire Linear Heat Detector zone to protect multiple areas with different ambient temperatures. The PHSC Series can support 135°F, 155°F, 190°F, 220°F, 280°F and 356°F being spliced into the same initiating device circuit. The PLR Series can support 155°F and 190°F being spliced into the same initiating device circuit.

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TYPE EPC CONSTRUCTION (VINYL JACKET) (PHSC)

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Type EPC is designed for interior, commercial, and industrial applications. The Features of this jacket include low moisture absorption, resistance to many common chemicals, and excellent flexibility at low temperatures.

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PHSC-155-EPC          Protectowire, Type EPC (155°F / 68°C)

PHSC-155-EPC-M      Protectowire, Type EPC on Msg. Wire

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PHSC-172-EPC          Protectowire, Type EPC (172°F / 78°C)

PHSC-172-EPC-M      Protectowire, Type EPC on Msg. Wire

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PHSC-190-EPC          Protectowire, Type EPC (190°F / 88°C)

PHSC-190-EPC-M      Protectowire, Type EPC on Msg. Wire

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PHSC-220-EPC          Protectowire, Type EPC (220°F / 105°C)

PHSC-220-EPC-M      Protectowire, Type EPC on Msg. Wire

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PHSC-280-EPC          Protectowire, Type EPC (280°F / 138°C)

PHSC-280-EPC-M      Protectowire, Type EPC on Msg. Wire

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PHSC-356-EPC          Protectowire, Type EPC (356°F / 180°C)

PHSC-356-EPC-M      Protectowire, Type EPC on Msg. Wire

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TYPE XCR CONSTRUCTION (FLUOROPOLYMER JACKET) (PHSC)

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Type XCR consists of a high-performance fluoropolymer jacket and is designed for exterior environments as well as harsh interior applications. Features of this low smoke jacket include excellent chemical resistance, abrasion resistance, weather resistance, and high-temperature performance. XCR is the only detector that is FM-approved for corrosive environments.

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PHSC-155-XCR          Protectowire, Type XCR (155°F / 68°C) 

PHSC-155-XCR-M      Protectowire, Type XCR on Msg. Wire

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PHSC-172-XCR          Protectowire, Type XCR (172°F / 78°C) 

PHSC-172-XCR-M      Protectowire, Type XCR on Msg. Wire

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PHSC-190-XCR          Protectowire, Type XCR (190°F / 88°C) 

PHSC-190-XCR-M      Protectowire, Type XCR on Msg. Wire

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PHSC-220-XCR          Protectowire, Type XCR (220°F / 105°C) 

PHSC-220-XCR-M      Protectowire, Type XCR on Msg. Wire

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PHSC-280-XCR          Protectowire, Type XCR (280°F / 138°C) 

PHSC-280-XCR-M      Protectowire, Type XCR on Msg. Wire

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PHSC-356-XCR          Protectowire, Type XCR (356°F / 180°C) 

PHSC-356-XCR-M      Protectowire, Type XCR on Msg. Wire

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LOW SMOKE ZERO HALOGEN (PHSC)

 

Type LSZH consists of a durable low smoke zero halogen outer jacket and is designed for interior commercial and industrial applications. Features of this jacket include low moisture absorption, resistance to many common chemicals, and excellent flexibility at low temperatures. 

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PHSC-135-LSZH        Protectowire, Type LSZH (135°F / 57°C)

PHSC-135-LSZH-M    Protectowire, Type LSZH on Msg. Wire

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PHSC-155-LSZH        Protectowire, Type LSZH (155°F / 68°C)

PHSC-155-LSZH-M    Protectowire, Type LSZH on Msg. Wire

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PHSC-172-LSZH        Protectowire, Type LSZH (172°F / 77°C)

PHSC-172-LSZH-M    Protectowire, Type LSZH on Msg. Wire

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PHSC-190-LSZH        Protectowire, Type LSZH (190°F / 88°C)

PHSC-190-LSZH-M    Protectowire, Type LSZH on Msg. Wire

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PHSC-220-LSZH        Protectowire, Type LSZH (220°F / 105°C)

PHSC-220-LSZH-M    Protectowire, Type LSZH on Msg. Wire

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PHSC-280-LSZH        Protectowire, Type LSZH (280°F / 138°C)

PHSC-280-LSZH-M    Protectowire, Type LSZH on Msg. Wire

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PHSC-356-LSZH        Protectowire, Type LSZH (356°F / 180°C)

PHSC-356-LSZH-M    Protectowire, Type LSZH on Msg. Wire

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TYPE XLT CONSTRUCTION (VINYL POLYMER JACKET) (PHSC)

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Type XLT consists of a outer jacket that is specifically selected for cold storage and freezers . Features of this jacket include low moisture absorption and excellent performance in extremely low temperatures. This detector has been UL and FM tested to –60°F (–51°C).

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PHSC-135-XLT         Protectowire, Type XLT (135°F / 57°C)

PHSC-135-XLT-M     Protectowire, Type XLT on Msg. Wire

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PLR TYPE R CONSTRUCTION (THERMOPLASTIC ELASTOMER JACKET)

 

Type PLR-EPR consists of a polypropylene elastomer jacket and is designed for universal compatibility through the use of special low-resistance inner conductors. Features of this jacket include good abrasion resistance, chemical resistance, and weather resistance. 

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PLR-155R               Protectowire Universal, Type R (155°F / 68°C)

PLR-155R-M           Protectowire Universal, Type R on Msg. Wire

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PLR-172R               Protectowire Universal, Type R (172°F / 78°C)

PLR-172R-M           Protectowire Universal, Type R on Msg. Wire

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PLR-190R               Protectowire Universal, Type R (190°F / 88°C)

PLR-190R-M           Protectowire Universal, Type R on Msg. Wire

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PLR TYPE CR CONSTRUCTION (FEP JACKET-ULTRA HIGH TEMPERATURE)

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Type PLR - XCR is constructed with low resistance inner conductors, allowing for longer detector zone lengths on most types of fire alarm panels including addressable panels. Utilizing a high-performance fluoropolymer outer jacket, this detector is specifically designed for use in applications where extreme environment and product criteria must be met. The flame retardant, low smoke jacket provides excellent abrasion resistance and mechanical properties over a broad range of applications. It provides excellent chemical and permeation resistance to a wide range of acids, bases, and organic solvents, as well as simple gases. In addition, the jacket exhibits very little change in tensile properties upon outdoor exposure to sunlight and weather.

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PLR-500CR            Protectowire Universal, Type CR (500°F/260°C)

PLR-500CR-M        Protectowire Universal, Type CR on Msg. Wire

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