Electronic thermometer with a remote sensor: selection of the optimal model and correct operation

A careful study of typical household needs will help ensure that frequent temperature measurements are necessary. Relevant data is useful not only for choosing the right clothing, taking into account real weather conditions. In the bathhouse of a private house, a suitable measuring device will come in handy to maintain optimal conditions. By choosing the right electronic thermometer with an external sensor, these and other tasks can be solved quickly and accurately. After studying this article, you can make an informed decision without mistakes.

You can get positive aesthetic emotions when looking at frosty patterns, however, it will not work to read the readings of a classic thermometer behind such an obstacle.

What practical tasks will an electronic thermometer with an external sensor help solve?

Above, a typical situation was mentioned when natural weather conditions in domestic latitudes prevent the prompt receipt of important information. The cheapness of alcohol thermometers is the only advantage. The list of shortcomings should be noted:

Such "cons" are not difficult to find in modern models

The products listed in this section are united by one feature - they are in working condition directly in the measurement area.All components are exposed to strong external influences, which provokes rapid wear and tear.

An electronic thermometer for measuring air temperature is equipped with a separate sensor

There is a possibility of separate installation of functional units. The compact measuring probe is easier to protect against harsh environmental conditions. The "delicate" electronic part is installed in a heated room.

These fundamental differences are also useful for temperature control in aquarium and pool, hot sauna and freezer. A thermometer with an external probe is ideal for on-line checking of parameters in a warehouse, office, or production area. It can be connected to a modern control system of the "smart home" category to optimize heating, ventilation and cooling modes. With the appropriate additional equipment, it is not difficult to organize remote data acquisition using standard Internet technologies.

Design and operation of the measuring device

How the thermocouple works

With the help of this figure, we will understand how the temperature sensor works. Products of this type are created from iron and constantan, chromel and aluminum, and two other different metals ("A" and "B"). It is desirable to maintain a constant temperature in the "T2" area. When it changes on the "T1" section, an electromotive force is generated in the conductors according to the physical Seebeck effect. The generated voltage can be measured with a sensitive voltmeter "V".

Typical electronic thermometer with a remote sensor, assembled

The following components are marked in the photo:

Technical characteristics and rules of operation of a digital thermometer with a remote sensor

In the simplest version, the indoor unit has limited protection against adverse external influences

This part is intended to be used in a heated room. Therefore, manufacturers offer an appropriate temperature range, humidity level... The probe in the corresponding design is used in different conditions. They measure the readings in liquids, bulk substances. Electronic thermometers with a remote sensor are used to control the temperature of the walls of the pipes of the heating system, bulk materials. Below are the limiting parameters that are typical for equipment in this category.

In addition to LCD, LED indication is installed in a digital thermometer with a sensor

This option slightly increases the power consumption, but does not need a separate backlight. Below are the functionalities of some production models:

Varieties of electronic thermometers with a remote sensor

Manufacturers offer a wide range of products in this category. To meet the growing needs of modern users, they release models with advanced functionality at a reasonable cost.

Modern wireless thermometer with external outside temperature sensor

Here the probe is installed in a separate housing together with a battery and an integrated transmitter. It can be installed in the desired location without drilling window frames and walls for cable routing. The required data is sent online to the receiver of the main unit. Further, the standard algorithm is used to process / display information. In standard models, the sensor range is from 30 to 100 meters, which is quite enough for solving most everyday tasks. To study the topic in detail, the following is information on various modifications of equipment, taking into account the most common applications.

Outdoor window electronic thermometers with external sensor

Typical models

First, batteries are inserted into a special compartment, the lid is closed

Next, a hole of the required diameter is drilled in the window frame. An electronic thermometer probe with a remote sensor is inserted into it. With the help of a sealant, gaps are eliminated.

The electronic unit is installed in a place convenient for the user

The main advantage of the simplest outdoor electronic thermometers is their minimal cost. It should also be noted the advantages of compact dimensions, ease of installation operations, rather high measurement accuracy compared to classical counterparts.

Features of electronic thermometers with additional functions

Modern models

Improvements in manufacturing and sales processes have significantly reduced the cost of electronics. Nowadays, a well-equipped outdoor thermometer with a remote sensor can be bought inexpensively. The following are the benefits potential of such a technique. The use of wireless communications speeds up and simplifies installation, ensures the safety of building structures and decorative finishing of premises.

One main unit connects from 3 to 10 indoor and outdoor sensors. This allows you to control the air temperature in several rooms. In particular, this equipment is combined with a boiler control. With the correct settings, it will be possible to optimize the operation of the heating system, which quickly compensates for the costs of the corresponding modernization.

In addition to temperature, specialized sensorsthat allow you to control the level of humidity in the room and outdoors. Of course, this version is a special electronics unit for processing such additional data.

Modern multifunctional equipment

In this example, sensors for temperature, humidity, atmospheric pressure, wind direction and speed are mounted on a sturdy metal post. Signals from them are sent to the indoor unit via wireless communication channels. A solar battery is installed for autonomous power supply of the external components of the kit.

This technique belongs to a special category. "Meteostations"... Unlike electronic digital thermometers, in addition to displaying actual data, it is capable of processing information. Based on data on pressure changes, a meteorological forecast is formed (from 12 hours to 7 days).Some models are capable of showing time, regular and lunar calendar. Technique with a multicolor display.

Technology with a multicolor display is capable of performing the functions of a photo frame

Let's go back to the thematic products. In the course of studying the measuring equipment of this category, it is necessary to mention an automobile thermometer with an external sensor.

The neutral appearance allows such panels to be installed without compromising the aesthetic parameters of the vehicle interior.

How to choose an electronic thermometer with a remote sensor for a bath

Features, advantages and disadvantages

When searching for suitable equipment, it is necessary to take into account high humidity and temperature, rapid parameter changes. You need accurate measurements to set up and maintain optimal conditions in the steam room. Sufficient strength of an electronic thermometer with an external sensor will come in handy so that the individual components remain intact and functional if not handled carefully. It is imperative to prevent overheating of external parts in order to ensure a good level of safety during operation.

Models of this type are equipped with several sensors, which are used to control the temperature in the steam room, rest room, and other rooms of the bath complex

Moisture sensor and other important parts

For a high-quality reproduction of a health-improving and relaxing process in a steam room, it is imperative to control several parameters simultaneously:

The metal braided cable is well protected from mechanical damage

The wooden housing of the electronic thermometer with external sensor matches the aesthetics of the classic finish. It also provides good electrical insulation.

Correct Mounting Location for Remote Sensor Thermometer

The indicator unit is mounted outside the pair compartment

The probe is fixed at the height of the main lounger, as a rule, at a height of 1.2 ÷ 1.5 m. A place is chosen at the maximum distance from the entrance and the heating device. An additional sensor can be used to monitor the temperature of the pool water.

How to make an electronic thermometer with your own hands

Electrical diagram

For independent reproduction, you can use a simple design, which is not difficult for a person with initial skills and knowledge in the field of electronics. The main component here is a dedicated DALLAS DS1820 temperature sensor. If desired, dozens of similar devices with a maximum communication cable length of up to 300 m can be connected to one bus.

When installing a digital thermometer circuit with your own hands, you need to pay attention to the polarity. Corresponding “+” markings are printed on the body. Review the sensor lead placement in the accompanying documentation.

With careful assembly, it will be possible to place all radio components in a standard RS 232 housing

To protect the temperature sensor from adverse conditions when placed outdoors, it is filled with an appropriately sized epoxy resin. Next, the standard connector is connected to the PC. DigiTemp is used for data processing. Finding a version of a program that is supported by a specific operating system (Windiows or Linux) on the Internet is not difficult.

The measurement results are displayed on the computer screen as follows

Market overview with prices, differences between different models, useful recommendations

Photo	Brand / Model	price, rub.	Specifications, features, comments
	RST / 77110	1200-3500	A specialized digital thermometer with a wireless sensor for a bath. Measurement up to + 200 ° C, backlight, signaling of threshold values, autonomous power supply.
	DC / 2	620-890	Here one sensor is built into the main body. You can control the temperature outside and at the place where the electronic unit is installed.
	Datronn / HTC-2	640-950	Built-in humidity meter is designed for indoor operation, calendar, clock. The remote probe is connected with a 2 m wire. The minimum / maximum values ​​are stored in the memory.
	Sima-Land / 567524	180-560	A simple inexpensive model with an outdoor temperature sensor. The length of the connecting wire is 90 cm.
	GAL / WS-1300	230-490	Saving measurements, wire connection (140 cm), AAA batteries.

It will be easier to buy a good electronic outdoor thermometer with a remote sensor if you study the opinion of the owners in addition to advertising and general technical data.

A high-quality electronic digital thermometer is inexpensive, so the independent creation of a similar device is advisable only as a satisfaction of the craving for creativity. However, in some situations, this is the only way to successfully solve non-ordinary problems. Share your own experience and ask questions in the comments to the article. This site can be used to publish recommendations for the operation of factory models.

A video about creating a more complex design compared to the example discussed above - a thermometer with a clock

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How to humidify the air in a room without a humidifier: original methods and secrets What is the rate of humidity in the apartment and how to achieve its optimization Do-it-yourself sauna ventilation: an algorithm for creating an effective system at no extra cost Which indoor hygrometer is better to buy: classification, description, principle of operation How to lay linoleum: everything a master needs to know