P.T.S Digital Linear Heat Detector

A linear heat detector is a fire detection system that detects any temperature change that can occur due to a fire. It is an advanced fire protection system that operates along the length of a sensor cable and detects heat, instead of smoke.

Unlike point detectors that monitor a specific area, linear heat detectors cover a larger area along their length. This makes them suitable for applications where early detection of a fire or overheating condition is required over an extended distance.

The MS 1000 Digital Linear Heat Detector operates on an early intelligent switch-type detection system and is connected to an alarm to protect the covered area. When the temperature rises above a certain specified point, a heat-sensitive material will fuse, causing a short circuit that will trigger the alarm instantly.

Features of Linear Heat Detector

A linear heat detector is made out of a linear heat cable, an adaptor unit, and a termination unit. The linear cables are designed to trigger a response when a specific temperature is reached. It is made out of a temperature-sensitive material that can detect any changes in temperature along its entire length.

When the signal triggered by the temperature-sensitive material reaches the adaptor unit, the electrical signal gets converted into an alarm signal in the fire alarm panel. The detector has continuous sensitivity and cannot be influenced by external factors.

Types of Linear Heat Detector Cables

The linear heat detector cables come in three main types as illustrated below.

Conventional type : This type of linear heat detector cable is normally used in a wide range of environmental conditions with strong stability.

CR/OD Type : This cable not only has good UV and weather resistance but also has high performance of acid-resistance, alkali-resistance, and salt spray-resistance. Thus, it can be used outdoors even under poor weather conditions.

EP Type : This is an explosion-proof type cable and is used in harsh EMI (Electromagnetic Interference) and explosive hazardous environments.

Features of Linear Heat Detector Cables

Industrial safe design
Can detect heat at any point throughout its length
Electrical interface with low power consumption design
Real-time monitoring
Works with 24 VDC supply or without it
Fast response time
No alarm temperature compensation is required
Compatible with any type of fire alarm system
Supports multiple temperatures – 68⁰C, 88⁰C, 105⁰C, 138⁰C, 180⁰C

Advantages of Linear Heat Detector System

Extended Coverage : Linear heat detectors can monitor large or elongated areas along their length, providing continuous and comprehensive coverage. This makes them ideal for applications such as conveyor belts, cable trays, tunnels, and other extended hazards.
Early Detection : Due to their design and placement, linear heat detectors can provide early detection of overheating conditions or potential fire scenarios. This early warning can be crucial for initiating timely response actions and minimising the risk of fire spread or damage.
Versatility : Linear heat detectors come in various types, including fixed temperature, rate-of-rise, and analogue models. This offers flexibility to meet specific application requirements and environmental conditions.
Robustness : Linear heat detectors are typically more robust and resistant to environmental factors such as dust, moisture, and contaminants compared to smoke detectors. This makes them suitable for harsh or challenging environments where traditional detectors may be prone to false alarms or malfunction.
Seamless integration : Modern linear heat detector systems can be seamlessly integrated into fire alarm systems, building management systems, and other monitoring platforms. This integration enables centralised monitoring, alarming, and control functionalities which enhances the effectiveness of the entire system.

What temperature does a linear heat detector activate?

The heat detector system comes with an alarm preset of temperatures – 68⁰C, 88⁰C, 105⁰C, 138⁰C, and 180⁰C. Thus, the linear heat detector will activate at these temperatures. However, it’s important to note that the maximum ambient temperature should be less than the parameters listed above.

Moreover, we should not only consider the air temperature but also the temperature of the protected device. Otherwise, the detector will generate a false alarm.

To choose the detector temperature according to the ambient temperature, you can refer to the table below.

Alarm temperature	68°C	88°C	105°C	138°C	180°C
Ambient Temperature(Max)	45°C	60°C	75°C	93°C	121°C

Where it can be used?

Electric Power Industry : Application: Cable trough, cable trench, transformer, control cabinet, cooling tower, photovoltaic system
NUCLEAR POWER : Application: Cable trough, cable trench, transformer, control cabinet, cooling tower
COAL INDUSTRY: Application: coal conveyer belt, power supply cable
PETROCHEMICAL ENGINEERING : Application: floating roof tank, arch tank, ball tank, cable groove, cable bridge
OFFSHORE PLATFORM : Application: Cable bridge, transformer, electrical equipment
FERROUS METALLURGY : Application: Cable tray, cable trench, transformer, electrical equipment, belt conveyor
HIGHWAY TUNNEL : Application: tunnel roof, cable tunnel, electrical equipment
RAIL TRAFFIC : Application: Cable tray, transformer and distribution equipment
UTILITY TUNNEL : Application: Cable bridge, electrical equipment
WAREHOUSE LOGISTICS : Application: elevated warehouse, cold storage, self storage warehouse
GENERAL INDUSTRIAL : Application: Cable tray, conveyor belt, transformer, distribution cabinet and electrical equipment, lubricating oil equipment, hydraulic equipment
COMMERCIAL BUILDING : Application: Cable tray, cable shaft, transformer, electrical equipment, switch cabinet.

Specifications

Approvals

Linear Heat Cable

A linear heat cable, also known as a heat sensing cable or linear heat detector, is a specialised type of linear heat detection device used for fire detection and protection in various applications. Unlike traditional point-type detectors that cover a specific area, a linear heat cable provides continuous and extended coverage along its length, making it suitable for monitoring elongated hazards or areas.