Household gas alarms (sensors) are a way to protect yourself from gas leakage. Gas leak detector with alarm for home: Household gas detector Household gas leak detector

Modern apartments, private houses overwhelmingly use this type of fuel as gas for cooking, space heating and providing hot water. In the event of an emergency situation, when any element of the equipment leaks, there is a high probability of an emergency.

To prevent the occurrence of fire, explosion or suffocation of people in the room, a device such as a gas leak detector is used. This device is able to protect property, health and life of people from accidents.

Purpose of the signaling device

The gas leak sensor can be produced in different variations. However, the purpose of such devices is always identical. Similar devices every year they are gaining popularity among owners of private houses and apartments.

The cost of modern signaling devices is relatively low. All devices presented in the open trade must have quality certificates. This device provides round-the-clock monitoring of the content of toxic gases and hazardous components in the air masses inside the premises.

The scope of the presented devices includes methane, propane and carbon monoxide. Installing a signaling device will help to avoid the explosion of combustible gases that have accumulated in the room due to a violation of the integrity of pipelines and equipment systems. Also presented devices can prevent suffocation of people in the house in case of accumulation of carbon monoxide when the burner is extinguished or backdraft is formed.

The gas detector can also be used as an additional warning device for the occurrence of a fire of gas origin in the early stages of their formation.

Principle of operation

gas sensor gas leak (household) has a certain principle of operation. It is based on the movement of air masses through convection. The flows pass through sensitive components that are built into the instrument.

If the concentration threshold of toxic, hazardous substances in the air has exceeded the limit set for the device, the sound signal. The equipment is disconnected from the supply gas communications. The alarm also includes forced ventilation. The alarm signal is transmitted over the network or via GSM communication channels.

After the cause of the emergency has been eliminated, the gas equipment can be restarted and operated again.

Types of indicators

There are several types of gas leak sensor. First of all, it is necessary to distinguish between household and industrial indicators. For a house, the second option is not suitable for certain reasons.

There are many models of the presented equipment. They can be conditionally divided into 3 main groups. Semiconductor devices absorb gas by the surface of a sensing element made of a special material. It is coated with metal oxide. The equipment compares the readings of the semiconductor with the limit values set in the settings.

The second group includes electrochemical devices. They use an analyzer to take measurements. The third category of signaling devices is based on the principle of air research in the infrared range. Whatever principle of measuring indicators the device uses, it compares the results obtained with the set threshold.

User and expert reviews

Modern gas leakage sensors for the home must have a number of characteristics, regardless of the design of the system. Feedback from users and experts highlights several basic functions and features that the device should have.

First of all, according to consumers and gas service workers, gas alarms should respond to changes in the level of both carbon monoxide and methane, propane. In this case, a special shut-off valve should work. A shut-off valve should be responsible for this function. It responds to an electromagnetic pulse sent by the device. If necessary, the gas supply is stopped.

Consumer Feedback on Useful Features

Also, according to user reviews, good model of the presented device, if necessary, includes a ventilation system. Also, advanced equipment can transmit an alarm signal to the owner even at a distance.

User reviews note such a useful feature as autonomous power supply. It is also important that the device performs self-diagnostics. If the device fails, the system will notify the owner. This will allow you to replace faulty equipment in a timely manner.

Shutoff valve

The gas leak sensor, the reviews of which were discussed above, will not be functional without a shutoff system. After all, if a leak occurs, action must be taken as soon as possible. Otherwise, savings when buying a signaling device will turn into serious problems in the future.

Shut-off devices come in different diameters, types and principles of organization of work.

The first group includes normally open (impulse) cutoffs. Enters the coil electricity, this causes the mechanism to move. Such cut-offs are installed more often at enterprises. However, in private homes, their use is also possible. Especially if there are power outages in the house.

The normally closed type of cutter responds to voltage drops. At this moment, the gas consumer is cut off from communications.

Ventilation

Installing gas leakage sensors involves connecting the system to ventilation. In the event of an emergency, the hood will quickly eliminate the accumulated gases from the room. The connection diagram of the signaling device in this case will not require much cost. After all, the hoods connected to common system ventilation, is in almost every home.

It is necessary to solder the wire from the relay contacts to the switch button in parallel. Also in this case, you can use the cap clamps. They are fixed on the wire, creating a good contact.

But in such a situation, if there is not enough experience, it is better to contact a professional electrician. He will do such a good job. In the matter of arranging a gas alarm independent connection could be very costly in the future.

Installing the signaling device

Modern gas leakage sensors (household) may have a simple or complex structure. Whatever type of device would not be chosen by the consumer, the installation cannot be done independently. It is also not worth resorting to the help of inexperienced craftsmen. After all, the safety of people living in an apartment or house depends on the correct connection of such devices.

The installation of the presented equipment can only be carried out by professional master who has a license for the right to perform such work. This is the only way to be sure of the well-functioning operation of the unit in accordance with the characteristics of the gas equipment installed in the room.

An ordinary user will not be able to take into account all the nuances of the heating or household appliances. Even the average user will not be able to choose the right place for installing the signaling device without knowledge of the relevant SNiP. Therefore, such work is entrusted exclusively to a specialist.

A few installation rules

To understand the seriousness of the presented installation, it is necessary to general development read a few rules from official documents. They state that a gas leak detector with an alarm for the house must be located in close proximity to heating or household equipment. At the same time, the list of equipment that is included in this list includes, in addition to the boiler, a column, a stove and a counter. From all these devices, the signaling device should be located no further than 4 m.

The device must be at least 1 m away from sources of open fire. It is strictly forbidden to mount the detector above the stove. Also, the presented equipment cannot be installed in places where fat, ash and dirt accumulate. In such conditions, the device will quickly become unusable.

The signaling device should not be located close to windows, ventilation systems. Otherwise, if a leak occurs, it will not be able to catch the increased concentration of gas in the room.

These are the basic rules. There are many more nuances in choosing a location for the sensor. Therefore, it is almost impossible to determine it on your own.

Rules for determining the position of the sensor

In addition to the features that a gas leak sensor with an alarm has, it is necessary to take into account the properties of those flammable substances that it detects.

The detector should not be placed higher than 1.8 m from the floor in the room. But even lower than 0.3 m, it also cannot be installed. This is due to the lighter weight of the carbon monoxide mixture compared to air.

Heavy gas (methane) settles in the floor area. To determine the high concentration of methane, the detector must be located no more than 0.5 m from the ceiling.

If the detector's sensor is designed as a combination sensor, it detects the presence of methane and carbon monoxide in the room. It must be installed at a level of 0.3-0.5 m from the ceiling.

The natural gas leak sensor is very easy to attach to the wall. There are corresponding holes in the case. However, before the master installs the device, the owners must move the detector to a warm room. If the device long time stored in a cold room, his testimony will be untrue. Before installation, the device must be warmed up at room temperature.

After installation, the owners can clean the device from dust and dirt with a dry cloth. It is forbidden to perform other actions with the signaling device. It is strongly not recommended to independently check the health of the system. It is impossible to bring burning matches, lighters, paper to the signaling device. Otherwise, the sensitive elements of the equipment fail. This could turn into a tragedy in the future.

Before using the gas detector, carefully read the manufacturer's instructions. Compliance with all its rules is mandatory.

Using a device such as a gas leak sensor, you can protect yourself and your home from accidents associated with fuel leakage from the system.

Almost every day there are explosions and various degrees of fires that occur when gas enters the room. To avoid such situations, it is necessary to use a gas leak sensor. It serves to establish its content in the air. At critical indicators, the device notifies the surrounding personnel of a serious leak. gas can have in its configuration various shut-off valves that serve to shut off the flow of fuel. Most simple models determine the concentration of a particular gas. And if the allowable limit exceeds the norm, it signals this. Externally, this is a compact mobile equipment that can be installed anywhere. Typically used for security living conditions. But other models used in industrial premises are also widespread on the market.

What are leak sensors?

They are of two kinds. Wired and wireless. Looking at their name, we can say that they differ from each other in the source of power. The first type is connected to a household power supply, with a voltage of 200 V.

The second type works with the help of special batteries. The latter are located in the sensor itself.

Also, the gas leak sensor is classified according to the method for determining the concentration of fuel entering the environment. So there are the following types. Semiconductor, infrared and catalytic.

The first type operates with the help of semiconductors, the principle of which is to absorb gas oxide heated to a certain temperature. Devices of the following type resemble explosive lamps in their design.

Its work is carried out on the basis of gas combustion, while decomposing it into two components: water and devices of the latter type determine the concentration of fuel, due to the absorption of a medium that is within the infrared spectrum.

Features of leakage sensors

As mentioned earlier, all sensors are divided into two types - wired and wireless. Now let's take a closer look at their features. The wired gas leak detector functions from a conventional consumer electrical network, with a voltage of 220 V.

Most people believe that this species is unsafe. With a high gas content in environment any short circuit will lead to an explosion. But this idea is considered wrong. The device is assembled using special technologies. Therefore, the occurrence of an explosion due to a short circuit does not threaten. Gas leakage sensors for a wired type house have low cost and also quite easy to handle. Them negative side is a large consumption of electricity, which is required for the functioning of various sensors.

The wireless gas leak detector works with a battery built directly into the housing. Thanks to him, you can install devices anywhere. They also consume a fair amount of electricity. Therefore, they are not used in industrial areas. In addition, the cost of devices is quite high.

gas with valve

Currently, devices with a valve or other shut-off valves are used. Their design includes a sensitive element. With a high gas content in the room, it transmits a signal to the electrical circuit, and it closes. Then the valve closes, and the flow of fuel into the room stops. As a rule, the device is installed in front of any gas equipment, for example, a filter, a burner, a column, etc. The installation of such elements must be carried out by a special master. He installs stop valves into the pipe and check its performance. The valve has long term operation and does not require an electrical connection. To return the valve to its original position, you must turn it manually. Thanks to automatism, the household gas leak detector with a valve has become the most popular.

Characteristics of the device with alarm

Wireless communication elements are installed in current devices, thanks to which signaling parts can be used. If the amount of gas has passed normal performance, then the sensitive element is triggered. Then the signal goes to the owner on a regular phone.

Therefore, the owner can independently decide to eliminate this problem. The gas leak sensor with alarm has a special device. It can be used for the security system of other elements. For example, they are important element cozy home.

How Sensors Work

They are divided into three types: semiconductor, catalytic and infrared. Elements work differently, so you need to understand each type.

catalytic. The principle of operation of this type is the splitting of gas into elements such as water and carbon dioxide during combustion. A small amount of air great content fuel flows through the sensor. There is a combustion process. In this case, the resistance in the coil changes. Also in the device there is another coil, which serves to determine the rise in temperature. The greater the gas content in the room, the higher the resistance will be. To ensure that the coil is not subjected to any influences, thermal balls are placed at its ends. The latter are covered with a layer of glass. Such a device serves as a compensator. Information about the content of gas particles in the air comes in a matter of milliseconds.
semiconductor sensors. Their principle of operation is similar to that used in a catalytic device. A silicon wafer serves as a sensitive element. Metal oxide is applied to its surface. This method is also applied to the production of computer parts. In the case of contact with such a surface of gas particles, a change in resistance occurs, which corresponds to the concentration harmful substances in the surrounding air. Such devices are widely used in everyday life. They cannot be used for industrial purposes, as the concentration of some fuels is quite difficult to determine. One of negative qualities is a slow response, and long time recovery requiring personnel supervision.
infrared. They are used for industrial purposes to determine the gas content in the room. When compared with the catalytic type, significant advantages stand out. These include fast turn-on times and low power consumption. The principle of operation is to analyze gas particles using light. The light waves are located in the infrared range. So, in the analysis, two waves are used: the reference and the studied. Two media pass through a certain light source and return back. Further, the device analyzes the corresponding signals and shows the amount of fuel in the room.

Installation of gas leakage sensors

Their location depends on the type of gas produced. For example, if its mass is greater than air, then the devices are installed in the lower parts of the wall. If used, the location is reversed, i.e. the element is mounted under the ceiling.

When installing equipment, you must adhere to some rules:

do not install sensors near various gas appliances;
it is impossible to install them on gas appliances;
installation takes place in a room where air does not penetrate;
can not be installed near windows and doors;
do not install devices in rooms with a high content of ammonia.

Service

When buying a household gas leak sensor, it is already configured. Therefore, during installation, it is not necessary to make any preparatory work. After installing it, you should watch it for a while.

In addition, it is necessary to clean the surrounding areas of the device from dust and other contaminants. In this case, you should not overdo it so as not to disable the sensitive element.

Another important point- performance check. To do this, apply gas to the sensor. You can do this with a regular lighter. After the sensor has been triggered, you need to pay attention to It must be loud enough to be heard by the whole service staff. After the weathering of the gas, the device recovers itself. If the devices are equipped with shut-off valves, then the performance is checked manually.

Price

The price of the sensor depends on the concentration of which type of gas you need to determine.

The type of equipment also affects this indicator. Wireless devices cost much more than wired devices. The price for them is in the range from eight hundred rubles to four thousand.

Heating with fuel-burning units is convenient, economical and efficient. Leakage of combustible gas or combustion products is undesirable during the use of the boiler.

A household gas detector (or sensor) is a device that monitors the quality of the ambient air in the boiler room. When a dangerous concentration of harmful substances in the air accumulates, the signaling device is triggered: it turns on the sound and light signaling, turn off the gas supply and stop the combustion of fuel in the boiler.

Installing such a sensor will protect the owners from the accumulation of gas in the room and help to eliminate the leak in time.

The signaling device can send a signal to mobile phone(in the presence of GSM module and connecting it to the subscriber's number).

Gas detectors are installed in rooms where accumulation of harmful substances is possible. Conventional gas analyzers are capable of detecting accumulations of carbon monoxide, propane and natural gas(methane).

Carbon monoxide (CO) is a substance released during the combustion of fuels and can be deadly when released in an enclosed area.

Methane (CH4) is the main element of natural gas, which is supplied through the central gas pipeline. When it accumulates, an explosion and fire can occur (even from the smallest spark).

Propane (C3H8) is the main element of a liquefied propane-butane mixture, which is heavier than air, so even when open window possible accumulation of gas in the lower part of the room.

Design and principle of operation of gas detectors

The operation of gas detectors is based on various sensors: thermomechanical, optical or electromechanical. All gas analyzers consist of certain elements:

The sensor is a sensitive element that senses and calculates the gas concentration in the ambient air.
The measuring and indicating module is a system that perceives the signal of the primary converter and compares it with the set value.
The power supply is a system for providing electrical power to the device.
Instrument body.

Functionality of gas detectors:

Light and sound alarm.
Shut off the gas supply with a solenoid valve.
Turn on the exhaust device.
Signaling to a fire or control panel.

If you are planning to build a bath, do not forget about.

Another way to heat a bath is a warm floor, more about it in.

Types of gas detectors

The main difference between gas analyzers is the type of gas captured. The most common household alarms are gas analyzers for:

carbon monoxide;
methane;
propane.

Combined gas analyzers capable of capturing several types of gas at once.

Household signaling fans

One of the types of localization of the accumulation of harmful substances in the boiler room is the installation exhaust fan, which turns on at the signal of the gas analyzer and performs forced ventilation.

Shut-off valves

The electromagnetic shut-off valve is used to instantly stop the flow of gas at the signal of the gas analyzer. There are various valves:

By pipeline diameter.
Electrical.
with acceptable pressure.
Differing in design.

There are 2 types of construction: normally open and normally closed.

They have the following differences:

The normally open valve is cocked manually, and during operation it is not energized. In the event of a gas analyzer triggering, an electrical impulse is applied to close the valve. The valve is marked - "NA";
The normally-closed solenoid valve is also manually reset, but for this it is necessary to ensure the supply of electricity. During operation, it is constantly energized, and at the signal of the gas analyzer, the voltage disappears and the valve closes.

For domestic purposes, it is best to use normally open valves, since the absence of voltage will not affect their operation.

Cost of solenoid shut-off valve: type N.A., 220 V, Pmax: 500 mbar:

Nominal diameter	Cost, rub.
Madas Day 15	1490
Madas Day 20	1515
Gross Dn 20	1360
Madas Day 25	1950
Gross Dn 25	1470

Operation of gas detectors

It is better to mount gas analyzers to a vertical plane where gas leakage can occur (near a boiler, furnace, gas meter, gas column).

Do not place the gas analyzer in the following places:

Close to gas burners(1m).
In places of heavy pollution (dust, grease, ashes).
Near ventilation ducts.
Where paint, solvent and combustible materials are stored.

When installing the sensor, consider physical properties gas and its density:

Methane - not lower than 0.5 m from the floor.
Carbon monoxide - at a height of 1.8 m from the floor, but not higher than 0.3 m to the ceiling.
Propane not higher than 0.5 m from the floor.
Combined sensor for methane and carbon monoxide - in the range of 0.5-0.3 m to the ceiling.

To ensure smooth operation solenoid valves you need to install rechargeable batteries with an automatic switchover system.

The passport of the gas analyzer describes all the functions and requirements for operation, and their observance will allow to achieve reliable operation of the equipment.

Gas analyzer installation

Installation of the device does not require much effort, it can be mounted on dowels or screws. The passport of the device contains a diagram for connecting the electrical power to the device and connecting it to the rest of the equipment.

Installation of solenoid valves on the gas pipeline must be carried out only by a qualified specialist.

Periodic examination

At least once a year, it is necessary to conduct a survey of the gas analyzer performance.

Domestic gas explosions in Russia do not surprise anyone. Almost every week, the media reports tragic cases related to this dangerous type of fuel. In 2015, 15 emergencies occurred in Russia, as a result of which 17 people died. In 2016, the situation worsened: in the first three months, employees of the Ministry of Emergency Situations recorded 10 similar cases.

Experts name several reasons for the disappointing trend:

System errors in Russian legislation. Negligence of officials and lack of proper control of in-house gas equipment.
Depreciation of intra-house gas communications. A device for detecting gas leaks can solve the problem, and in the long term - replacing old communications.
Violation of the rules for the operation of gas appliances.
Human factor. Boiling water hits the burner. The fire goes out. There is no household gas analyzer, and after a while the gas fills the room. The slightest spark leads to tragedy. The second scenario - the hostess turns off the gas on the stove, and it goes out.

Among other reasons - a malfunction of the gas stove, errors in the design of the smoke exhaust system. The gas enters slowly, and the person sitting in next room does not feel bad smell. But the gas leak sensor instantly signals an emergency situation and avoids trouble.

How to check for a gas leak at home?

The most common leak points are threaded connections, welded seams, stop valves.

Method number 1. soap solution

Gas leak: how to determine? You will need a sponge laundry soap and water. After creating a soapy emulsion, apply it to the site of the alleged leak. Often, leak-finding foam can pinpoint exactly where a pipe is leaking. Leakage signals are inflated air bubbles.

Method number 2. Smell

Go outside for a few minutes and then return to the kitchen. The presence of an odor indicates a leak. What does a gas leak smell like? The fuel smells like ethyl mercaptan, an additive that has a special odor.

Approach the pipe joints. If gas is leaking from the hose connections, you will hear a characteristic hissing sound. An additional symptom is yellowing of the leaves. indoor plants. With a small leak, household members may experience a headache.

If you don't know how to check gas leaks at home, don't trust internet users who recommend checking fittings with matches. Bring matches to gas pipes Absolutely forbidden. There is a known case when a pensioner, smelling a smell, lit a match “for testing”, after which she received severe burns of her hands and face.

Modern gas leak detector with alarm for home

There is an easier way to secure your home - install a gas detector. This is small device, which continuously monitors the concentration of combustible gases in the room. Its task is to inform the user about exceeding the value controlled parameter its limit value.

Home appliances respond to:

Propane.
Methane.
Carbon monoxide.

There are combined models. The task of the sensors is not to determine the degree of gas contamination of the room, but to warn of a leak in time. The equipment will give a signal much earlier than the gas concentration reaches an explosive value.

A gas leak detector with an alarm for a home can be:

Semiconductor. It is based on the interaction (diffusion) of atoms. Upon contact of the active substance (carbon or tin) with carbon monoxide alarm mechanism is triggered.
Catalytic. In electrochemical sensors, the sensitive substance is the electrolyte, and its action is based on the oxidation process. It is launched by gas molecules in contact with the electrode.
Infrared (IR). Such a household gas leak detector is considered the most reliable. The incoming air is checked for gas content by means of infrared radiation.

Devices are also divided into wired and wireless.

The gas leak alarm can also perform other functions:

send an alarm signal to the relay to start the exhaust fan;
shut off the gas supply (this will require the installation of shut-off valves - a special shut-off valve);
send an alarm signal to the control panel of the security company.

The last feature requires detailed consideration.

Household remote control gas leak detector

The main disadvantage of traditional sensors is that the owner can hear the alarm signal only if he himself is in the apartment. If there is no one in the apartment, and there is no one to take emergency measures, the concentration of gas in the kitchen will increase. This flaw is easily solved by connecting to a gsm alarm device.

How can you detect a gas leak while at work or on vacation?

Combine the sensor with the alarm system. When the analyzer is triggered, the sensor sends a signal to the owner of the apartment via gsm communication, and also informs the security headquarters about the gas content. Employees of the service company arrive at the site within a few minutes and eliminate the danger.

Advantages of the kits:

No false positives, 100% elimination of leakage.
Control of the object in 24/7 mode.
Maintenance free. It is enough to wipe the grate from dust and cobwebs.
Possibility of integration with security system, fire detectors and water leakage control devices.
Mobile phone control.

When you already know how to check gas stove for a gas leak, and how serious the consequences of a leak can be, it's time to think about installing annunciators. The cost of special sensors will pay off with your peace of mind and the health of loved ones.

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