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Siren Signals and Alarm Systems for Gas Detection Systems

With fixed gas or fire detectors related to gas detection controllers In addition , ATEX sirens , combinations of light and sound , illuminated signs (illuminated screens), CO2 detection light column And waterproof flares a wide one like sound and/or light control systems We offer a range of . These required safety devices are intended to warn people in the area in question, signal a particular risk or action to be taken, and alert security services.

Sirens (audio alarm devices)

Sirens, It has a wide sound spectrum, mostly set between 105 and 130 decibels. Therefore, they are very suitable for giving warnings in very noisy environments. These devices, for example AFNOR NFS32001 tone It is equipped with a large number of standard tones including .

Signal (visual alarm devices)

Constant lights, strobe lights (flashing lights) and rotating flares There are many types of visual alarm devices (VADs), including and all are designed to improve the safety of workers in hazardous gas environments. We also provide light signal towers available in many colors (red, orange, clear, green or yellow) depending on applications. Visual alarm devices that can be installed in many different areas may need different colors for different messages.

Security light backlit panels

These security lighting fixtures are equipped with a buzzer and feature customizable or standard text. Often mounted above doors or entryways, these security signal lights are designed to warn people from entering hazardous areas or prohibit access.

Audio visual combinations

Combined siren flare base, It combines a flare and a siren to create an audible and visual alarm. Such devices are mainly used to effectively warn about a fixed gas detector alert and trigger emergency evacuation of the site. Because combination security devices can meet the multiple alarm requirements of security regulations with just one device It is the most widely used system.

All our siren signal and alarm systems comply with the 94/9/CE directive and ATEX (explosive atmosphere) rules and are available in different voltages from 12 VDC to 240 VAC.

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Gas Detection Controller

One or more permanently connected to the fixed gas detector gas detection unit , is the most important element of a fixed gas detection installation. It provides continuous and permanent monitoring and produces actions in case of gas detection: signals, automatic controls or remote transmission of alarms. this device explosive, poisonous or suffocating gases It provides continuous monitoring 24 hours a day, 7 days a week for hazards associated with its presence.

Fixed gas detectors, It continuously measures gas concentrations in ambient air. These concentrations are then processed by to gas detection unit is converted into an electrical signal to be sent. In the presence of gas, the gas detection unit produces predefined actions such as sound and/or light signals, interlocks or alarm reports (remote transmission).

gas detection controller

For example, in gas boiler rooms, the presence of gas will be controlled by cutting off the gas safety solenoid valve. In the tertiary sector, in the presence of concentrations of toxic or suffocating gases, forced mechanical ventilation will be controlled by the facility. For other facilities, the gas detection unit will control an action at the TGBT (e.g. battery charging room ) to immediately stop the process.

There are two types of controllers: single channel controllers And multi channel controllers . The only difference is the number of gas sensors that can be connected. A single-channel detection unit can be connected to only a single sensor or a maximum of two sensors. Multi-channel detection units can be connected to a variety of fixed gas detectors, from 2 to several dozen.

Gas detection installation

Gas detection units In addition to the supply of connected fixed gas detectors, we also offer complete management of the file, from functional analysis, on-site installation, commissioning (configuration and calibration of gas detectors) and user training.

We work with the biggest brands in the field – such as Dräger, Honeywell Analytics, Oldham and MSA – which is a guarantee of quality and compliance with current standards.

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Optical Flame Detectors

Optical flame detector, reacts to radiations emitted from any type of flame. A flame detector sensor is designed to quickly (a few tens of milliseconds) alert any fire output via analog (4-20 mA), digital (RS485 communication, Modbus or Hart) or simple dry contacts (relay) . Most, ATEX areas It is suitable for installation and is SIL2 certified.

Infrared flame detector principle

The optical flame detector consists of ultraviolet (UV) and infrared (IR) sensors. The most efficient flame detectors usually have several sensors (UV, UV/IR, IR3 or IR4). Like a fixed gas detector, an optical flame detector is usually a gas control It works in conjunction with the unit.

Most of our optical flame detectors SIL2 It is approved. They provide a high level of performance and reduce mean times between failures ( MTBF ) for more than 17 years .

Related fields of activity

Optical flame detection system, refineries , gas pipelines And pump stations , storage warehouses (solvents, alcohols, dyes), offshore platforms , printing facilities and also all ATEX It is well suited for highly hazardous industrial areas such as classified areas (explosive atmosphere).

These fire-exit monitoring units are specifically designed for hydrocarbon – flammable gas – (fuel, gasoline, jet fuel), methane (CH4). It is very effective in detecting LPG, hydrogen, polypropylene fires and, for example, paper fires in printing facilities.

Different types of flame detectors

  • UV flame detector – Made with a UV-sensitive sensor. It produces an output signal based on radiation and compares it to an accurately calculated reference.
  • IR flame detector – consists of an IR sensor sensitive to CO2 released as a result of fire.
  • UV IR flame detector – consists of a UV-sensitive sensor combined with an IR sensor for the detection of hydrocarbons, hydrogen and metal flames with a high-speed response time (<150 ms). It requires the simultaneous response of both sensitive units.
  • IR3 flame detector – three pyro-electric sensors detect IR radiations associated with different emission peaks. The IR3 sensor for hydrocarbon flame monitoring is immune to sunlight.
  • IR4 flame detector – It is a combination of 4 infrared sensors to detect hydrocarbons and hydrogen flames from 5 to 65 meters away.
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Open Path Gas Detectors

Open path gas detectors It complements fixed-point gas detectors and offers several important technical advantages, such as larger monitoring zones and faster response times with a higher probability of gas leak detection. They consist of a transmitter and receiver, the most powerful of which can be spaced up to 200 meters apart. They can be found in many industrial applications, including offshore platforms, petrochemical plants, gas pipelines and large-scale storage areas.

Many fixed gas detectors replaceable open road gas detectors , is an innovative and relevant solution for hydrocarbon detection, especially over long distances. Their optical and mechanical designs provide fast response, long life, excellent stability and low maintenance and operating costs. Widely used in petrochemicals, sanitation and water or ammonia treatment hydrogen sulfide Other models for detection are also available; It is the ideal solution for large-scale storage and ammonia discharge areas.

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Fixed Gas Detectors

Fixed gas detectors are sensors for gaseous substances designed to detect and measure gas concentrations in air. explosive gases (natural gas, LPG, hydrocarbons, solvents, alcohols), poisonous gases , volatile organic compounds (VOCs), suffocating gases (lack of oxygen) or freons They measure (refrigerants). They are usually associated with a gas detection unit to manage control systems and provide daily protection of the installation 24 hours a day, seven days a week.

Most fixed gas detection systems for toxic and flammable gases require connection to a gas detection controller. 4-20 mA linear output has and ATEX compatible. A more advanced fixed gas detector may also be equipped with a digital display, alarm relays or digital communication. For each type of gas guaranteeing the accuracy and frequency of measurements a specific sensor technology (Learn more about sensor technologies).

Flammable gas detector (explosive meter)

flammable gas detector (natural gas, LPG, hydrocarbons, solvents, alcohols) constitute the largest part of gas detection. A fixed gas detector for flammable gas can be used in almost every industry: industries with SEVESO or COMAH plants, chemical, petrochemical as well as gas detection in boiler rooms in the tertiary sector such as. There are two main monitoring technologies depending on the targeted flammable gas to be detected:

  • catalytic sensor : sensor technology used for almost every flammable gas. This solution is highly efficient for monitoring natural gas, LPG, hydrocarbons, solvents and even some volatile compounds.
  • Infrared Sensor : This technology should be preferred for every sector where there is a constant residual presence of flammable gases (refineries, paint or solvent factories, distilleries…).

toxic gas detector

As the use and production of highly toxic products in industry becomes stronger, the dangers to goods (explosion risk) and people (poisoning risk) also increase. Explosions and deaths occur every day around the world, reminding us of this problem.

Monitoring toxic gases The most commonly used for sensor technology It is an electrochemical sensor . This technology, which can be found in a portable or fixed gas detector, provides a large panel of gas detection sensors. For some rare gases that require measurements expressed in ppb (parts per billion), only colorimetric paper technology will be available.

Asphyxiating gas detector (lack of oxygen)

suffocating gases, It contains many gases with the same properties: They reduce the oxygen level . In almost every case a Even if the oxygen gas detector (O2 detector) is sufficient, for example a CO2 gas detector It is recommended to use an asphyxiating gas detector when available, such as a (carbon dioxide) or a helium fixed gas detector .

  • For oxygen and some rare gases electrochemical sensor
  • For carbon dioxide (CO2) infrared absorption sensor
  • For almost any flammable gas that can replace oxygen in case of leakage catalytic sensor

VOC detector (Volatile Organic Compound)

volatile organic compounds ( VOC ) is a large family of gases and gaseous substances that can be polluting, toxic and even carcinogenic. Because they are volatile, they can easily spread into the atmosphere. Therefore, to be protected, they must be detected and measured with a fixed VOC monitor.

VOC explosive mixtures before concentrations reach an explosive level (tens of thousands of parts per million). they are very toxic . In fact, explosiveness levels are set at ten ppm. Various technologies are available for VOC detectors depending on the risk to be monitored:

  • For toxicity detection photo-ionization lamp (PID lamp) or semiconductor sensor (expressed in ppm).
  • Catalytic sensor for explosiveness detection or infrared absorption sensor (where available) expressed as %LEL.

Refrigerant gas detector (freons)

Halogenated hydrocarbons (CFCs and HCFCs), alkenes (HFOs), and almost every refrigerant are regulated under specific legislation that limits (or prohibits) their use. The use of chillers also requires a monitoring system – usually a fixed gas detector for freons . There are two main measurement technologies for Freons:

  • semiconductor sensor : The most commonly used technology for monitoring freons
  • Infrared absorption sensor : A very sensitive but very expensive technology used for some freons

Gas Detects offers many services for fixed gas detection in certain regions, such as on-site installation, installation, commissioning and calibration of gas detectors. We can also perform maintenance and periodic checks of your fixed systems. (Care and on-site calibration section go )