Home Article Outdoor temperature sensor for gas boiler

Outdoor temperature sensor for gas boiler

Naturally, the sensor should be placed within the heater’s zone of influence. Therefore, they are also distinguished by the method of placement:

  • Surface mounted. installed with a tight contact directly on the heated surface;
  • Immersed. placed inside the coolant;
  • indoor. the temperature in the room is controlled;
  • Outdoor. measures the condition of the outside environment outside the house. Have a waterproof case.

Outdoor temperature sensors for the boiler.543 products

From 3,492 ₽ Outdoor air sensor, IP44, NTC 15 kO. Buy online
From 690 ₽ Room temperature sensor DS18S20 Buy
From 595 ₽ 9 reviews ZONT DS18B20 Outdoor Thermo Sensor Coolant / Outdoor ZONT Buy
From 2 136 ₽ 2 reviews Outdoor temperature sensor (Baxi) art. KHG71406211. Buy
From 2 460 ₽ 6 reviews Radio sensor outdoor ZONT ML-711, 868 MHz Buy
From 4 460 ₽ Thermostat for boiler SALUS Controls 091FL Buy
From 590 ₽ Temperature sensor for boiler Wolf FGG-K-24
From 1 629 ₽ Baxi Outdoor temperature sensor for Baxi boilers Buy
From 3,190 ₽ Stout Wireless outdoor temperature sensor C-8. Buy from
From 3 688 ₽ Thermostats and sensors Thermo Outdoor temperature sensor. Buy from
From 595 ₽ ZONT DS18B20 outdoor/heat sensor. Buy online
From 617 ₽ Submersible temperature sensor NTC (8434820) for Boiler and Heat Pump. Buy
From 692 ₽ Outdoor temperature sensor for Navien Ace boiler
From 266 ₽ Ds18b20 digital temperature sensor (in metallic. Buy
From 690 ₽ ZONT ML-771 temperature sensor for heater
From 1,900 ₽ Outdoor temperature sensor S010075 for Pro boilers. Buy online
From 3,400 ₽ Outdoor temperature sensor Vaillant VRC 693
From 630 ₽ Zont DS18S20 wired temperature sensor with mounting bracket. Buy online
From 1,350 ₽ Outdoor temperature sensor with connector Buy
From 115 ₽ Tim RTC03 cable temperature sensor
From 1,600 ₽ Thermo regulator Protherm Exabasic Buy
From 400 ₽ Water resistant temperature sensor with cable 5 meters(D. Buy
From 3,492 ₽ Outdoor air sensor, IP44, NTC 15kO. Buy
from 2 339 ₽ BUDERUS boiler temperature sensor FK 1/4 (Logamat. Buy from
From 400 ₽ Thermal sensor with cable 5 m (DS18B20) Buy
from 1 290 ₽ Thermostat ErgoLite TP-03.1 V (with temp. sensor). Buy online from
From 2 380 ₽ PROTHERM Outdoor temperature sensor for PROTHERM t. Buy
From 1,260 ₽ Thermo temperature sensor 700 outdoor / coolant set 2. Buy online
From 695 ₽ EVAN temperature sensor EVAN GSM-Climate (112025. Buy online
from 655 ₽ Room temperature sensor DS18S20
From 1,325 ₽ 10 kOhm boiler temperature sensor, for Fe boilers. Buy online
From 15,563 ₽ Thermostats and sensors Thermo Sensor temperature and in. Buy
From 380 ₽ Sensor (thermostat) KSD 301. 105C (10A) 1051806 Buy
From 320 ₽ Temperature sensor Starline G ZQ29 (45cm) Buy
From 6 397 ₽ Thermo regulator Protherm Exacontrol 7
From 5 570 ₽ Temperature sensor with GSM module, remote yes. Buy online
From 690 ₽ Temperature sensor ZONT DS18S20 room wired. Buy from
From 562 ₽ Temperature sensor TST02-2.0 (-20 to 80) 2m 6.8 k. Buy
From 10,168 ₽ VIESSMANN Outdoor temperature sensor NTC 5K for K. Buy from
From 1,984 ₽ Temperature sensor Baxi KHG71406211
From 1 271 ₽ Room active temperature and humidity sensor. Buy online
From 2 526 ₽ Outdoor temperature sensor QAC22 Siemens Buy
From 1,350 ₽ Airone Temperature Sensor Airone TJK 330 Buy
From 979 ₽ Baxi DHW temperature sensor for LUNA3. Buy online
From 3 337 ₽ Thermostats and sensors Thermo Temperature sensor ETF. Buy
From 550 ₽ Temperature sensor JXW-54 (NTC 10 kOhm at 25°C, dia. Buy online
From 3 069 ₽ Outdoor temperature sensor Vaillant VRC 693
From 1,193 ₽ Temperature sensor (Honeywell), 39810220 7861235 T. Buy online
from 8 980 ₽ Control unit EVAN ZONT-H1V Buy
From 4 159 ₽ Thermostat Protherm Exacontrol Buy
From 590 ₽ Sonoff DS18B2 waterproof temperature sensor. Buy online

Outdoor temperature sensors for boiler category for Moscow contains 543 products, which are sold in 54 stores at ranging from 80 to 30100

Temperature sensors for boilers

Boiler, widely used today for autonomous heating, refers to the equipment of high risk due to the special properties of the fuel used natural gas. Therefore, its safety is the responsibility of the automation system, which monitors the boiler and ensures the operation mode set by the consumer. To perform its functions accurately, the automation system needs to know what temperature the coolant has at any given time. To be able to obtain this information, the design of all gas boilers include temperature sensors.

Where to install

The DT is installed as close as possible to the controlled parameter. Thus, in double-circuit boilers they are placed on the return before the boiler inlet, at the outlet of the boiler in the supply pipe, at the outlet of the unit in the DHW circuit.

The DT for monitoring the flue gas return temperature is installed at the boiler outlet before the mouth of the chimney. Wireless DT for a boiler unit are placed directly on the controller or on the gas shut-off valve. Wired. connected in the version marked by the manufacturer of the equipment.

Principle of operation of sensors

Thermostats, as well as programmers, in essence, operate on the same principle. You set the temperature threshold below which the boiler switches on heating. The difference between the devices only in their triggering threshold, which depends directly on the quality of. The Chinese counterparts of famous devices tend to have a longer response time than the European original.

In the norm is considered a threshold of one degree. For example, if you set the temperature maintenance at 20 degrees, then the normal threshold, when the temperature drops below 19. the boiler will work. And when it rises above 21, it will turn off.

Chinese analogs have a spread of up to two or more degrees, which accordingly affects the quality of the burner. At the same time, more expensive and high-quality models from European manufacturers can have an error of only 0.2 degrees for example.

Classification of types of temperature sensors

The choice of sensor depends on the environment in which you want to control the temperature: inside the boiler, in the room or in the heating system. On the right choice depends on the efficiency and safety of heating equipment.

Temperature sensor for the heating boiler is classified according to the following criteria:

Types of sensors according to the method of determining the temperature

According to the method of determining the temperature there are sensors:

  • Dilatometric, which are bimetallic plates or spirals, based on the thermal expansion of metals or other types of solids.
  • Resistive, having a strong dependence on the temperature in a particular measured range, which appears as a sharp change in electrical resistance.
  • Thermoelectric, which are thermocouples (alloys of two dissimilar conductors, such as chromel-alumel), in which at certain temperature ranges begins to induce a thermo-electric emf.
  • Manometric, which principle of operation is based on the change in pressure of gas or liquid in a closed volume.

Dilatometric sensors are made of materials with a high coefficient of thermal expansion, which respond to minimal temperature fluctuations. The principle of their operation is based on closing or opening of electric contacts. To increase their sensitivity and the quality of contact in the designs use magnets.

Resistive thermal sensors are made of special alloys of conductors or semiconductors. Structurally, they consist of a coil with wound thin copper, platinum or nickel wire and a ceramic housing or semiconductor plates placed in a plastic or glass housing.

Semiconductor resistors come in two varieties:

  • Thermistors with a non-linear temperature dependence, characterized by a decrease of resistance when heated,
  • Pistors, also having a non-linear dependence on temperature, but differing from thermistors in the increase of resistance when heated.

Thermoelectric sensors are made of two heterogeneous metals or alloys, in the contact point of which when heated induces thermo-electric emf, the value of which is proportional to the temperature difference between the two junctions. In this case, the measured value does not depend on the temperature, length and cross section of wires.

Manometric sensors allow to determine the temperature in a non-magnetic way without energy sources, which allows their use for remote measurements. However, their sensitivity is an order of magnitude worse than that of other temperature sensors, and there is also the effect of inertia.

Types of sensors by the type of interaction with the thermostat

Temperature sensors by the type of interaction with the thermostat are divided into the following types:

  • Wired, transmitting data to the controller by wire,
  • Wireless. high-tech modern devices that transmit data on a specific radio frequency.

Wired temperature sensor for the boiler

The choice of the temperature sensor should be made with the following criteria in mind:

  • range of measured temperatures, the sensor should be as sensitive as possible and respond to changes in heating with the minimum delay;
  • the technical details of the installation: immersed or mounted, whether there is enough space for mounting, etc. д.;
  • measurement conditions under which the negative influences can be minimized;
  • characteristics of the sensor: necessity of voltage supply, speed of transmitted signal, measurement inaccuracy, permissibility of operation in specific conditions;
  • the period of operation, periods of maintenance, the need for calibrations;
  • output signal value.

about the differences in the operation of boilers with outdoor temperature sensors and room thermostats

My name is Alexey Markovets. I am responsible for technical support at HOGART

In today’s article I would like to talk about the differences in the boilers with sensors of outdoor temperature and room thermostats, as well as how to behave automatics of boilers when working with such equipment.

Most homeowners have heard that it is not superfluous to complete your gas boiler room thermostat or room regulator with a temperature sensor (jumping ahead, I say. these are completely different devices and the boiler works with them differently).

Everybody knows that the room thermostat is a good addition to the heating equipment. Most professionals buy them to save gas and as a result. to save money.

Many believe that if you buy an outdoor temperature sensor in addition to the boiler and thermostat, they get the most economical heating system. So let’s look into the validity of these statements.

outdoor, temperature, sensor, boiler

Let’s start with definitions and differences:

ROOM THERMOSTAT is a device used to set the desired room temperature (if there is only one thermostat the whole system will be controlled according to its settings). When reaching the set temperature the thermostat will open contacts and the boiler burner will shut off! Please note that a normal thermostat does NOT control the operation of the boiler, it shuts down the boiler burner completely.

ROOM TEMPERATURE REGULATOR. has a built-in temperature sensor. On the regulator, as well as on the thermostat, the user sets the level of temperature he wants to maintain in the room where the regulator is located. Unlike the thermostat, the room regulator does not turn off the burner. As the temperature in the room changes, the resistance of the temperature sensor built into the regulator changes. The boiler board senses these changes and gives the command to modulate the burner (reduce the burner power) or turn it off. In “advanced” boilers, when you connect a room regulator, the automatics compares the speed of change of temperature of water in the heating circuit and the speed of change of air temperature. Matching these parameters the boiler “tries” to reduce the power so as to maintain operation at a low power by maintaining the temperature set on the regulator in the room (this is the ideal situation).

FLOOR TEMPERATURE SENSOR. like the room regulator, it is equipped with a temperature sensor, whose resistance varies depending on the outdoor temperature.

Boiler automatics reads these changes and depending on this sets the temperature of the coolant. Heat loss of the premises can be different, so in order to account for this parameter in the boiler automation “sew” a few options of operation at the same street temperature (the so-called temperature curves).

This approach allows you to configure the automation to work with each specific room.

Now a bit about the boilers themselves (we will talk about gas boilers, as the most common).

boilers with an open combustion chamber. structurally they are the most “ancient” representatives of the family of gas boilers. In principle, from their more modern counterparts, they differ in that the amount of gas sucked into the combustion chamber is determined by the rarefaction in it (of course the diameter of the nozzles also matters, but this parameter is constant). Simply speaking, the gas is sucked in as much as it is obtained. And the quality of gas-air mixture in this case is not controlled in any way. As a consequence. the gas consumption of such boilers is rather high (compared to, for example, boilers with closed combustion chamber or condensing boilers). Air for combustion, in this case, is taken from the room where the boiler is located.

CLOSED CHAMBER BOILERS. among other things, interesting because the level of rarefaction in them does not depend on external factors, but is determined by the work of the fan, which is usually at the outlet of the chamber (although it can be at the inlet). By stable air suction, such boilers provide a relatively stable quality of gas-air mixture, which means that their efficiency will be a couple of percent higher than counterparts with an open chamber, and the gas consumption is slightly lower.

Nuance: most of such boilers, receiving a signal from the room temperature regulator try to reduce power. they go in modulation mode. The amount of gas entering the combustion chamber decreases, but the amount of air often remains the same. Thus, the quality of the gas-air mixture drops slightly. However, in absolute terms, such boilers are still more economical than similar boilers, but with an open combustion chamber.

CONDENSATION COILS. nowadays they are the most advanced part of the gas heating equipment. Both in terms of internal structural elements (heat exchanger, gas fittings, etc.) and in terms of internal design of the boiler.), as well as by the level of their automatics.

How do they differ from their listed counterparts for the better??

outdoor, temperature, sensor, boiler

The most important thing. by virtue of the design features in such boilers, the excess air ratio is always maintained at an optimum level throughout their operation in any mode (at maximum, average, minimum or any other output). (for natural gas this is a value of 1.05. 1.1)

That is, during modulation (decrease in the amount of gas supplied to the combustion chamber), the amount of supplied air also decreases. Thus, the quality of the gas-air mixture is maintained at an optimal level.

Installed Smart House Sonoff TH with Temperature Sensor for Gas Boiler BAXI


To burn 1 m3 of methane you need 10 m3 of air. Then the excess air ratio is the ratio of actually supplied air quantity to the required. So the closer to 1, the better. For methane (recall), the optimum value of this parameter is 1.05. 1.1.

Now about the equipment and sensors.

1). By connecting the sensor of street temperature to the boiler, we save gas due to the fact that the boiler can reduce the temperature of the coolant, given the temperature changes in the street, including daily variations in temperature.

2). By connecting a mechanical room thermostat together with an outdoor temperature sensor, you save some more. The air in the room cools down quite slowly. As long as the air temperature in the room where the thermostat is located is higher than the set temperature, the boiler will shut down the burner and wait for the thermostat’s “permission” to start it. Maximum saving is achieved by installing an outdoor temperature sensor together with a programmable room thermostat (programmable by day of the week and by hours).

This option allows you to set a lower air temperature when you are not home and heat the room when you come home. You can do the same using thermostats with internet access, but this requires your occasional participation with internet access (or GSM. although this option is becoming a thing of the past). Most families have a fairly steady rhythm of life: parents go to work in the morning, children go to school or college (just when you can lower the indoor temperature). This way you can set the program once and never have to ask again.

3). Connecting the sensor street temperature with a room regulator we get the maximum opportunity for gas savings. Due to the outdoor sensor the boiler will reduce the temperature of the heating medium. Room regulator with built-in temperature sensor will allow the boiler to modulate, reducing power, but without turning off the burner (or reduce the number of shutdowns to a minimum).

With such a set of equipment, the boiler will tend to maintain the set temperature in the room, keeping its output at the lowest possible mode. This mode is optimal in terms of gas savings, as well as in terms of extending the life of the equipment. The highest efficiency of this scheme will show when using the condensing boiler.

Temperature sensors for gas boilers. air and water, indoor and outdoor

Ensuring comfortable living conditions in a modern country house is unthinkable without a reliable and safe in operation autonomous heating system. The most important element of the equipment of such systems is an individual heating boiler, capable of maintaining a comfortable climate in the premises. The most widespread are gas boilers, since natural gas is still the cheapest fuel in Russian conditions.



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