| Applications | Electrical industry Mechanical engineering & Plant construction Metal industry Semiconductor industry |
| Operating temperature range | 0 to 50 °C |
| Detector type | VOx Uncooled Infrared FPA |
| Interfaces | Analog video, digital video, RS232, UART |
Heat detectors
Heat detectors, also called heat alarms, capture the heat generated by a fire. If the limit temperature monitored by the sensor is exceeded, the alarm is triggered (maximum value detector). Thermal difference detectors respond to a rapid temperature increase relative to the room temperature in a defined period of time; the temperature increase per unit time. Automatic heat detectors can emit audible or visual alarms. Another application is, e.g., the evaluation of the alarm signal via an evaluation unit to trigger a sprinkler. Heat differential detectors can also be as thermal maximum detectors because each heat differential detector also has a maximum value setting.
Heat detectors are used, e.g., in rooms in which smoke detectors would trigger false alarms due to air containing smoke or dust. Heat detectors are less suited for the protection of persons. Smoke development can endanger persons even before thermal radiation is detected by a heat detector.
Linear heat detectors
The sensor cables of linear heat detectors consist of copper wires. The sensor cable is connected to an evaluation unit. Each of these copper wires is surrounded by a material with a negative temperature coefficient (NTC). If the temperature around the sensor cable increases, the resistance decreases and the evaluation unit evaluates the signal accordingly.
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Heat detectors are used, e.g., in rooms in which smoke detectors would trigger false alarms due to air containing smoke or dust. Heat detectors are less suited for the protection of persons. Smoke development can endanger persons even before thermal radiation is detected by a heat detector.
Linear heat detectors
The sensor cables of linear heat detectors consist of copper wires. The sensor cable is connected to an evaluation unit. Each of these copper wires is surrounded by a material with a negative temperature coefficient (NTC). If the temperature around the sensor cable increases, the resistance decreases and the evaluation unit evaluates the signal accordingly.
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| Operating temperature range | 0 to 50 °C |
| Detector type | VOx Uncooled Infrared FPA |
| Customized versions | Expansion component |
Heat differential detectors can also be used as heat maximum value detectors, since each heat differential detector also has a maximum value setting.
Heat detectors are used, for example, in rooms where smoke detectors would trigger false alarms due to smoky or dusty air. Heat detectors are less suitable for personal protection. The development of smoke gas can lead to a personal hazard even before heat radiation is detected by the heat detector.
Line heat detectors
The sensor lines of the line heat detectors consist of copper lines. The sensor line is connected to an evaluation unit. Each of these copper wires is surrounded by a negative temperature coefficient (NTC) material. If the temperature around the sensor line increases, the resistance decreases and the evaluation unit evaluates the signal accordingly.
Heat detectors are used, for example, in rooms where smoke detectors would trigger false alarms due to smoky or dusty air. Heat detectors are less suitable for personal protection. The development of smoke gas can lead to a personal hazard even before heat radiation is detected by the heat detector.
Line heat detectors
The sensor lines of the line heat detectors consist of copper lines. The sensor line is connected to an evaluation unit. Each of these copper wires is surrounded by a negative temperature coefficient (NTC) material. If the temperature around the sensor line increases, the resistance decreases and the evaluation unit evaluates the signal accordingly.
What is a heat detector and how does it work?
A heat detector is an electronic device designed to detect fire or heat. In contrast to a smoke detector, which detects smoke particles, a heat detector reacts to changes in temperature.
A heat detector consists of a temperature sensor that is set to a specific temperature threshold. If the ambient temperature exceeds the set threshold, an alarm is triggered. This alarm can take the form of a loud signal or a notification to a security system.
The functionality of a heat detector is based on the principle of passive infrared technology (PIR). The temperature sensor continuously measures the temperature in its surroundings. If a rapid rise in temperature is detected, for example due to a fire, the alarm is triggered.
Heat detectors are often used in areas where smoke detectors may be unreliable due to dust, vapors or high humidity, such as in kitchens, garages or storage rooms. They can also be used as a supplement to smoke detectors to improve safety in a building.
A heat detector consists of a temperature sensor that is set to a specific temperature threshold. If the ambient temperature exceeds the set threshold, an alarm is triggered. This alarm can take the form of a loud signal or a notification to a security system.
The functionality of a heat detector is based on the principle of passive infrared technology (PIR). The temperature sensor continuously measures the temperature in its surroundings. If a rapid rise in temperature is detected, for example due to a fire, the alarm is triggered.
Heat detectors are often used in areas where smoke detectors may be unreliable due to dust, vapors or high humidity, such as in kitchens, garages or storage rooms. They can also be used as a supplement to smoke detectors to improve safety in a building.
When should you install a heat detector?
It is recommended to install a heat detector in rooms or areas where a conventional smoke detector is not suitable. These include kitchens, bathrooms, garages and workshops, for example. In these rooms, smoke alarms can be triggered by steam, dust or other particles that do not necessarily indicate an actual fire. A heat detector, on the other hand, detects increases in room temperature that could indicate a fire. A heat detector should therefore be installed in addition to smoke detectors to ensure comprehensive fire protection. It is also advisable to install heat detectors in rooms where there are electrical devices that can cause overheating, such as server rooms or workshops with electrical machines.
What are the advantages of a heat detector compared to a smoke detector?
A heat detector has several advantages over a smoke detector:
1. Early detection of fires: A heat detector reacts to a rapid increase in room temperature, which can indicate a fire. This enables an early alarm and can help to detect fires at an early stage before smoke develops.
2. Fewer false alarms: Heat detectors are less prone to false alarms as they do not react to smoke particles. This can be particularly advantageous in rooms with steam, dust or cooking fumes.
3. Use in special environments: Heat detectors can be used in environments where smoke detectors are not suitable due to natural conditions, such as in kitchens or bathrooms.
4. Lower costs: Heat detectors are generally less expensive than smoke detectors, which can make them an attractive option, especially if a large number of detectors are required.
5. Longer service life: As heat detectors do not rely on batteries, they often have a longer service life than smoke detectors. Some models are even equipped with a hard-wired power supply.
It is important to note that heat detectors cannot detect smoke and therefore should not be considered a complete replacement for smoke detectors. Smoke detectors are still the best choice for detecting smoke particles in the air and providing early warning of a fire. The use of both heat detectors and smoke detectors can significantly improve safety in a building.
1. Early detection of fires: A heat detector reacts to a rapid increase in room temperature, which can indicate a fire. This enables an early alarm and can help to detect fires at an early stage before smoke develops.
2. Fewer false alarms: Heat detectors are less prone to false alarms as they do not react to smoke particles. This can be particularly advantageous in rooms with steam, dust or cooking fumes.
3. Use in special environments: Heat detectors can be used in environments where smoke detectors are not suitable due to natural conditions, such as in kitchens or bathrooms.
4. Lower costs: Heat detectors are generally less expensive than smoke detectors, which can make them an attractive option, especially if a large number of detectors are required.
5. Longer service life: As heat detectors do not rely on batteries, they often have a longer service life than smoke detectors. Some models are even equipped with a hard-wired power supply.
It is important to note that heat detectors cannot detect smoke and therefore should not be considered a complete replacement for smoke detectors. Smoke detectors are still the best choice for detecting smoke particles in the air and providing early warning of a fire. The use of both heat detectors and smoke detectors can significantly improve safety in a building.
Where is the best place to put a heat detector in the house?
A heat detector should be placed near potential sources of fire, such as in the kitchen, near heaters, fireplaces or electrical appliances. It is important that the detector is not placed too close to the actual heat source, as this can lead to false alarms. It is recommended to install the heat detector in the middle of the ceiling or, if this is not possible, near the ceiling on a wall. It is also advisable to install a heat detector on each floor of the house to ensure comprehensive monitoring. It is important to follow the manufacturer's installation instructions and to check the functionality of the appliance regularly.
How often should a heat detector be tested and maintained?
It is recommended that heat detectors are tested at least once a year to ensure that they are working properly. In addition, they should be maintained regularly to ensure that they are clean and free from dust or dirt. It is also advisable to check the batteries regularly and replace them if necessary. It is recommended to follow the manufacturer's instructions to ensure the best performance and reliability of the heat detector.
What types of heat detectors are there?
There are various types of heat detectors, which differ depending on the area of application and mode of operation. Here are some common types of heat detectors:
1. Thermoelectric heat detectors: These work on the basis of the Seebeck effect and use the temperature difference between two metal contacts to generate electrical energy. If the temperature changes, the voltage also changes, triggering an alarm.
2. Optical heat detectors: These use an optical sensor that reacts to changes in the infrared radiation emitted by warming objects. As soon as a certain temperature is reached, the detector triggers an alarm.
3. Ionization heat detector: These detectors use a radioactive source to generate air ions. If the temperature rises, the ionization of the air changes, which triggers the alarm. Ionization heat detectors react particularly well to fast-burning fires.
4. Solid fuel heat detector: These are preset to a specific temperature and are triggered if this temperature is exceeded. They contain a metal disk or a metal strip that expands when heated, thereby making an electrical contact to trigger the alarm.
5. Wired heat detectors: These are integrated into a monitoring system and can measure the temperature at various points in a building. They are often connected to other fire detectors and smoke detectors.
It is important to note that heat detectors are not the same as smoke detectors. Heat detectors react to changes in temperature, while smoke detectors react to smoke particles in the air. Both types of detectors are often combined to create a more comprehensive fire protection system.
1. Thermoelectric heat detectors: These work on the basis of the Seebeck effect and use the temperature difference between two metal contacts to generate electrical energy. If the temperature changes, the voltage also changes, triggering an alarm.
2. Optical heat detectors: These use an optical sensor that reacts to changes in the infrared radiation emitted by warming objects. As soon as a certain temperature is reached, the detector triggers an alarm.
3. Ionization heat detector: These detectors use a radioactive source to generate air ions. If the temperature rises, the ionization of the air changes, which triggers the alarm. Ionization heat detectors react particularly well to fast-burning fires.
4. Solid fuel heat detector: These are preset to a specific temperature and are triggered if this temperature is exceeded. They contain a metal disk or a metal strip that expands when heated, thereby making an electrical contact to trigger the alarm.
5. Wired heat detectors: These are integrated into a monitoring system and can measure the temperature at various points in a building. They are often connected to other fire detectors and smoke detectors.
It is important to note that heat detectors are not the same as smoke detectors. Heat detectors react to changes in temperature, while smoke detectors react to smoke particles in the air. Both types of detectors are often combined to create a more comprehensive fire protection system.
What is the alarm tone of a heat detector and how does it differ from a smoke detector?
The alarm sound of a heat detector is usually a continuous, loud beep. This sound signals an increased temperature in the vicinity of the detector.
A smoke detector, on the other hand, uses a pulsating, piercing alarm tone. This sound signals the presence of smoke particles in the air, indicating a possible fire.
The difference in the alarm sounds enables people to recognize the type of danger and react appropriately.
A smoke detector, on the other hand, uses a pulsating, piercing alarm tone. This sound signals the presence of smoke particles in the air, indicating a possible fire.
The difference in the alarm sounds enables people to recognize the type of danger and react appropriately.