10 Best Portable Gas Detectors: Best Deals Reviewed & Tips for Choosing

Best portable speakers (stereo)

If your requirements for sound are higher, then one channel is definitely not enough. Of course, full-scale acoustics will suit the music lover much better, but it cannot boast of being compact. But devices from the following category can also be taken with you. Yes, they are slightly larger than mono speakers. But on the other hand, any of the considered models is able to “rock” a cheerful company.

1. Ginzzu GM-986B

Cool portable speaker with flash drive and radio. The total power of the speakers in this model is 10 watts. The range of frequencies reproduced by them - from 100 Hz to 20 kHz. The device comes with 3.5 mm male/male and USB-MicroUSB cables, strap and documentation.The GM-986B's built-in battery capacity is 1500 mAh, which is enough for 5 hours of continuous music playback. The front panel of the speaker contains all the ports, including USB Type-A and an SD card slot, as well as controls.

Advantages:

• support for memory cards;
• convenient management;
• small sizes;
• battery charge indication;
• high volume.

Flaws:

• lacks a handle for easy transportation;
• inexpressive bottoms.

2. SVEN PS-485

The next portable Bluetooth speaker in the rating is the model from SVEN. This manufacturer is very popular in the computer acoustics market, as its products have a good balance of price and sound quality. The same can be said about the PS-485. This model is one of the most popular portable stereo speakers according to customer reviews. It is equipped with two 14 W speakers, has a multi-colored backlight that can work in several modes, a display and a control panel that allows you to adjust any sound settings. An ideal combination of price and quality, the SVEN speaker will also please karaoke lovers, since it has a microphone jack with an "echo" function.

Advantages:

• the presence of an equalizer;
• reading USB drives;
• microSD card slot;
• built-in LED display;
• convenient management;
• clear sound;
• the presence of illumination.

Flaws:

• quality of materials;
• volume reserve.

3. JBL Flip 4

In second place in the review of portable speakers with stereo sound is the Flip 4 from the American company JBL. This model is great for both smartphones and tablets. Flip 4 will appeal to music lovers and moviegoers who want to get rid of the flat sound.In addition, the device can work 12 hours in a row!

Taking into account the declared autonomy, the column charges quite quickly - 3.5 hours. Other features of the Flip 4 include IPX7 water and dust resistance. The device also has a good microphone for talking on the phone. As for the speakers, they are represented by a pair of 8 W emitters with a frequency range of 70-20,000 Hz.

Advantages:

• full moisture protection of the case;
• compact dimensions;
• great design;
• long battery life;
• perfect sound.

Flaws:

no charger included.

4. Harman/Kardon Go + Play Mini

An expensive and incredibly powerful portable speaker from the Harman/Kardon brand. Immediately warn that the prefix Mini in the title does not mean compactness. Just in this case, you will get a kind of reduced analogue of the standard Go + Play model. The dimensions and weight of the reviewed column are very impressive - 418 mm in length and almost 3.5 kilograms. Obviously, such a large device could not do without a durable handle that allows you to take it with you to nature or a party.

Go + Play Mini can work both from the built-in battery, which lasts up to 8 hours, and from the mains. All connectors are located at the back under the plug. Among other things, the manufacturer added a USB-A port to the column, but it is only intended for charging mobile devices. This is convenient if your phone starts to sit down in nature. The device is controlled by three buttons. The power of the device is as much as 100 watts. However, even at maximum volume, the Go + Play Mini sounds very nice and clear.

Advantages:

• metal handle;
• does not crackle at high volume;
• can work from the socket;
• high build quality and materials;
• ability to charge smartphones;
• huge power of 100 watts;
• great build and elegant design.

Flaws:

• no protection against dust and moisture;
• autonomy is good, but not for 15 thousand.

Tips for Choosing a Portable Projector

When choosing a portable projector, consider the following factors:

Purpose. Having decided on the main purpose of using the projector, you will significantly reduce the list of suitable options. For example, if you travel a lot and need a projector for business presentations, then the weight of the device will be the decisive factor in your choice.

Price. The price of portable projectors varies greatly.

It is important to understand that it is impossible to choose a quality projector at a low price. When choosing, consider the ratio of price and quality of work

Number of I/O devices. Think ahead about how many input and output devices you might need during your presentations. If you also plan to use an additional monitor in addition to the main screen, choose a projector with a second VGA input and output.

Place of use. It is worth considering the features of the place where the projector will be used. If you will be working most of the time outdoors, choose a projector with high brightness so that the sun's rays do not darken the picture.

For outdoor presentations, high resolution and contrast are also important, which improves image quality. The projector can make a lot of noise during operation, so choose ‘silent’ models for indoor presentations

Projection Distance and Zoom. For presentations in different locations, it is often necessary to change the distance from the projector to the screen, as well as adjust the image size and position of the projector. For small spaces choose a short throw projector, for large halls choose a long throw projector.

Reliability. Find out in advance the life of the projector lamp and other components, as well as the cost of replacing them.

Compatibility. Think about what devices will connect to the projector

For business presentations, a USB port is important, as it allows you to directly open a presentation from a flash drive

Aspects of application and other parameters

In order to find out which jigsaw is better to buy for work, you will have to determine the amount of future work, the type of material, and of course financial possibilities. Often there is a situation in which the question: “Which company to choose a jigsaw?” placed at the forefront. However, the use of a professional tool for the home is not always justified, even with its high functionality. In addition, any jigsaws, even the most reliable ones, can fail, and repairing tools from well-known manufacturing companies often entails high costs. In addition, a large engine power is not always useful when working with a small amount of material being processed.

Only after taking into account all the options in terms of reliability, price and applicability, it is possible to proceed to the choice of a specific model of jigsaw.

What the device shows

A blood gas analyzer is used to assess the patient's health status. Such a diagnostic measure allows the doctor to timely identify certain pathologies that are associated with impaired activity of the urinary, cardiovascular, and respiratory systems.

How does a blood gas analyzer work? What is this device for? A blood test is the most popular diagnostic method that allows you to determine a variety of pathological conditions within the human body. In addition to urea, protein, bilirubin, they also determine the content of gases in the blood

It is important for a doctor to know the quantitative content of carbon dioxide and oxygen, since the ability of the body to breathe normally depends on these gases.

The blood gas analyzer in the intensive care unit is an important link. The study is carried out in a hospital

The results allow the doctor to make an accurate diagnosis, analyze the effectiveness of therapy.

What are they?

The portable speaker attracted the attention of buyers with its convenience and functionality. Musical gadgets that do not require an electrical connection to operate come in a wide variety of shapes, sizes and colors.

And also the technique differs in functionality and technical characteristics.

To date, experts distinguish 3 main types of devices of this type.

Wireless speaker (or a set of several speakers). This is the most widely used type of gadget. It is needed to play music in MP3 format from a connected device (smartphone, computer, tablet, etc.). Some models have additional features, such as a radio, and are complemented by a display. The column can be used as a standalone device or as a speaker system for a PC.

There are several main types.

Battery. The most common and practical type of food. Battery powered speakers boast excellent performance. They can be used whenever and wherever.The duration of the equipment depends on its capacity. Periodically, you need to recharge the battery from the mains through the USB port.

Batteries. Gadgets that run on batteries are convenient to use if there is no way to recharge the battery. As a rule, several batteries are needed for operation. Depending on the model, different types of batteries are selected. When the charge is used up, you need to change the battery or recharge it.

Powered by connected equipment. The speaker can use the power of the device with which it is synchronized. This is a convenient option to use, but this will quickly drain the charge of the player, smartphone or tablet.

Gas analyzer device

Despite the many design variations of the device, there is a set of basic components that are present in each model. First of all, this is a housing that contains all the working elements of the gas analyzer. The fact is that such devices require a high degree of protection, so serious requirements should be imposed on the outer shell. Almost every device requires power supply - accordingly, the battery can also be considered as an indispensable part of the device. Next, it is worth moving on to a more responsible component. This is a primary transducer, that is, a gas analyzer sensor or sensing element that provides direct data for measurement.

It must be said that there are several types of such sensors, including thermal catalytic, infrared and electrochemical. The task of this element is to convert the desired component of the gas composition into an electrical signal.After that, the measuring and indicating device comes into operation, which processes this signal and demonstrates its indicators in the form of an indication or display on the display. Now it is worth considering the types of existing gas analyzers.

Criteria for choosing a portable printer

When buying a mobile printing device, you should focus on the following:

• Format - determines the quality of the printed information. Requirements for obtaining a high-quality image: from 1,200 DPI, illustrations - from 600 DPI, text content - from 300 DPI;
• Performance - the ability of the device to print a specific number of pages with color or black and white content per minute. Usually, the latter are printed faster;
• Memory capacity and the ability to display information from portable data storage devices (flash media, micro SD of various formats);
• Chip. The more productive it is, the faster color pictures are printed in large format;
• Interface - sets the ability to connect via Wi-Fi or Bluetooth. Allows you to function not only with a laptop or PC, but also with phones, smart devices and tablet PCs;
• Format. Often there are mobile devices on the market that can output the maximum print format, which is 10x15 cm (A6). Not so long ago, portable printers designed for printing A4 documents began to be in demand;
• Print settings set auxiliary page parameters: duplex, no margins, etc.;
• Operating system support. Compatibility of the system with the interface of a smartphone, laptop, tablet PC and other drive from which the file is printed.

The cartridge resources, the number of colors, and also the power of the battery should also be considered important. All these parameters make it possible to choose a printer that is extremely pleasing to the needs of the buyer. Do not forget that you need to accurately indicate the method and scope of use of a mobile printer. For example, in some cases you need a capacitive battery, A4 size and the smallest requirements in order to print b/w text.

1 RIDGID CD-100 micro 36163

This detector instantly detects the presence of combustible gases in the air - methane, butane, propane and many others. The high sensitivity of the device ensures very fast leak detection even in cases where the concentration of undesirable substance in the air is minimal. Thanks to this, it will become an indispensable assistant in the gasification of the house, the installation of heating equipment and the detection of leaks in its further maintenance. Compared to most professional gas analyzers, this model is relatively inexpensive, so it can be called one of the best in terms of price and quality.

And now for other benefits. Comfort and reliability are given to it by a strong, ergonomic design. It is possible to adjust the sensitivity if you need to detect a very small leak. Thanks to the flexible probe, you can get into even the most inaccessible areas, and the presence of a three-mode alarm system greatly simplifies the work. What makes it the best is a large list of detected gases, automatic calibration and extreme ease of operation, which even an inexperienced user will understand.

Attention! The above information is not a buying guide. For any advice, you should contact the experts!

Recommendations for choosing a gas analyzer

A large number of both domestic and imported devices are presented on the market of individual gas analyzers. Almost all of them have permits, including the Certificate and Declaration of the Customs Union, but it is far from always convenient to use them as devices that ensure the safety of the operation of gas equipment, as well as solid fuel and other equipment at home or in the work area.

So, there are a number of criteria by which gas analyzers should be evaluated. Let's look at them in order.

The hazardous gas analyzer must be used before being lowered into the sewerage well. Regardless of the results of the check, further underground work must be carried out with the mandatory presence of a portable meter.

When choosing an analyzer, you should pay attention to such technical features as the presence of several alarm thresholds and the ambient temperature range for operation. Built-in special connector allows you to connect the device to a personal computer

We also recommend that you familiarize yourself with the principle of operation of the gas analyzer in more detail.

Multigas analyzers are more versatile and can detect multiple substances including combustible gas, oxygen, carbon monoxide and hydrogen sulfide. In addition, they have a battery with a higher energy capacity than single-channel devices, and the battery charge rate is very high.

There are significant advantages in devices designed to control one specific substance. Such a gas analyzer takes up little space, its operation is controlled using a single key, which significantly saves time, for example, when checking for gas leaks.The process will be accelerated by the presence of modern sensors, the response time is reduced when the sensors are located at the top and front of the device.

In an apartment or a private house, the gas analyzer should first of all be used in places with the highest probability of gas leakage - near the boiler, geyser for hot water supply, stove and meter. The maximum allowable distance to the equipment depends on the model and is approximately 4 meters

Equally important is the type of device execution - explosion-proof or general industrial, as well as the possibility of using in hard-to-reach places. As practice shows, the built-in element for forced sampling, including a sensor or pump, is more reliable.

When using the analyzer in wells or deep tanks, there is less chance of a malfunction caused by a broken remote sensor or broken cable.

The basic equipment may not include chargers, sampling elements if they are not built into the gas analyzer, sample transportation lines, auxiliary parts for reading information. It is worth checking with the supplier in advance the price for the complete set. Calculate the cost of possible repairs and maintenance. Also make sure that the supplier can order imported parts and will not send to the direct manufacturer or dealer.

A portable gas analyzer can perform several functions. Its multitasking relies on the presence of built-in parts or auxiliary accessories, including cables, probes, portable pumps. The parameters of the measuring device are presented in the operating manual

Gas analyzers can also be used in work areas.In such cases, state verification is mandatory.

Please note that for some manufacturers, confirmation of conformity is not included in the mandatory service, and they perform it only for a fee.

Rating of radios for hunting and fishing

3. Motorola TLKR-T92 H2O

• walkie-talkie PMR
• 2 radios included
• transmitter power 0.5 W
• range 10 km
• power Ni-MH battery
• weight 233 g
• number of channels 8
• coding CTCSS, DCS
• headset connection

If you're looking for a walkie-talkie for fishing or boating, check out the Motorola TLKR-T92. Its rugged and durable design is IPX7 waterproof and can withstand heavy rainfall or submersion in water up to 1 meter for 30 minutes. This model is equipped with an 800 mAh battery that can work without recharging for about 16 hours, has a backlit display, and voice activation with a headset (VOX), as well as without a headset (iVOX)

In addition, instead of the native battery, you can install 3 finger batteries. Other useful features include a bright flashlight with a good beam angle.

This model is equipped with an 800 mAh battery that can work without recharging for about 16 hours, has a backlit display, and voice activation with a headset (VOX), as well as without a headset (iVOX). In addition, instead of the native battery, you can install 3 finger batteries. Other useful features include a bright flashlight with a good dispersion angle.

There are also standard features for a good walkie-talkie: scanning and monitoring channels, keypad lock, talk timer and call end signal.

Pros: two walkie-talkies and a case are included at once, convenient control and menu, USB connector is compatible with most chargers.

Cons: the battery is not Li-Ion, but Ni-MH, in dense urban areas, the range is about 300 meters.

2. UNION 4

• VHF/UHF radio
• transmitter power 5 W
• range 10 km
• power Li-Ion battery
• weight 215 g
• number of channels 128
• CTCSS, DCS, DTMF encoding
• headset connection

This 2-way walkie-talkie with a detachable antenna and a large-print LCD will withstand heavy rain or being dropped into a muddy puddle thanks to IPX4 water resistance.

In the forest, it provides reliable reception and transmission at a distance of 3 kilometers, and is equipped with a Li-Ion battery with a capacity of 1500 mAh. The kit includes a charger, antenna, strap, clip and headset. And the manufacturer did not stint and added a bright flashlight to the radio.

Pros: solid case, VOX and keypad lock, FM radio.

Cons: none.

1. Baofeng BF-A58

• VHF/UHF radio
• transmitter power 5 W
• power Li-Ion battery
• weight 300 g
• number of channels 128
• coding CTCSS, DCS
• headset connection

This sturdy, well-made walkie-talkie is IP57 water and dust resistant and has a built-in flashlight. It is suitable not only for hunters and fishermen, but also for other advanced users who need good two-way radio communication up to 5 kilometers in the field. Without consequences, it will withstand adhering dirt, and rain and falling into a puddle, and even rinsing in clean water.

It comes with a charging station, headset, antenna, belt clip and charging stand, has a charge indicator and a power saving mode.

Pros: VOX and FM radio, flexible antenna, large battery capacity (1800 mAh).

Cons: heavy.

What is the best glucometer

The expert rating is designed to make it easier for the buyer to find the most accurate glucometer. This is a list of only the most popular models. Based on the work functions of each nominee, indicators of accuracy and price, recommends:

• Diacont is a budget device with affordable "consumables" that does not require coding;
• Contour TS - the best value for money, performance, stylish design;
• iCheck iCheck is a compact model with a storage pouch that requires a minimum of biomaterial;
• Accu-Chek Mobile - a glucometer with a replaceable cartridge, modern functionality, suitable even for a child;
• Omelon B-2 is a multifunctional device that measures glucose levels, pulse, blood pressure;
• FreeStyle Libre is a unique sensor and reader monitoring technology.

If you still have not decided which device to buy in order to independently monitor your health, consult your doctor. And remember that there is no one ideal model in the world, each has its own advantages and disadvantages.

The best digital radio with good signal reception Sangean H-201

• high level of protection against water;
• work in FM, SV bands;
• display;
• there is a clock;
• You can connect headphones.

The Sangean is housed in a sturdy plastic case with rubber inserts. Withstands water jets. Able to work in the FM, SV bands. Frequency information is displayed on the built-in screen. There is an informative indication of the charge level. The kit comes with a special wall mount.

There are countdown and auto-off timers. This digital handheld radio even has a dedicated alarm signal. Functionality includes a clock.The device is powered by a battery. Network operation is not provided. On the front panel below the display are all the necessary buttons. So it is very easy to manage the device. The best digital radio receiver with good signal reception in the review.

The receiver has a high-quality speaker. The device confidently receives almost all stations in the FM band. Provides good water protection. You can use the device in the bathroom. Even a direct hit by a jet of water is not afraid of him. A convenient display will allow you to fine-tune the desired frequency.

Pros:

• FM, CB bands are supported;
• there is an informative display;
• control buttons on the front panel;
• good speaker;
• water protection;
• wall mount;
• timer and clock;
• charge level indication.