A bimetallic thermometer is a special device, the elements of which are assembled in a steel case with a chrome plated coating and a brass thermal bulb. There is a sensitive part inside, namely a spring or a plate. There is also a dial with an arrow, which is located under the glass, a kinematic mechanism. Standard devices are capable of showing temperatures in a wide range from - 70 to +600 degrees.
All devices are divided into 2 groups, including axial and radial. The former have a parallel axis to the bulb, and the latter are located at an angle of 90 degrees. The article will help you choose the best bimetallic thermometer in 2020, which is presented in stores.
Content
TOP rating of the best
The review contains the best options for today. For each there is a small description of characteristics, features, as well as pros and cons. The rating is based on consumer and expert opinions.
TB8
This model has a design that allows you to use the device even in the most severe and extreme conditions. Thanks to circular welding using a welded rod with tungsten spraying in the inert gas area of the bulb and body, it turns out to achieve maximum reinforcement of the product.
The fit is made very accurately and carefully, which eliminates various leaks when filling the thermometer with liquid, and also prevents damage due to vibration force. Accuracy class for the model is 1. As the basis for the case, a stainless steel is used, which is characterized by strength and reliability.
The glass to protect the dial and the thermometer itself is made of several layers. The device is not exposed to the negative influence of moisture and dust, protection class IP65. Recommended for use in the petrochemical, chemical, gas field, and also suitable for construction or design.
pros:
- Fully meets the main parameters for hygiene and safety at work, which are prescribed by the European directive.
- The work is convenient and comfortable.
- It is possible to use the local indicator option.
- It can be installed even on the most complex equipment.
- Large temperature range.
- Affordable price around 700 rubles.
The model has no minuses.
Watts FR810
This is a surface-mounted device suitable for reading temperature indicators in a heating system. This option is characterized by a high-quality and sealed case; a plate is installed inside it, which is made of a pair of different types of steel.
During measurements of temperature indicators, deformation begins, which shows accurate data. To rotate the indicator arrow, a shaft is used, one part of the plate is mounted to it, and the second part is stationary.
pros:
- Selectable size within 3-6.5 cm for the spring or 3-7.5 cm for the copper tape.
- There is no need for compulsory certification.
- The optimal temperature range is 120 degrees.
- The accuracy class is 2.
- A small price within 400 rubles.
The cons of the product is not defined.
BT-31.211
The optimal cost model from the Russian manufacturer CJSC Rosma. The device is often used by customers due to its long operational life and simple, comfortable operation.It is recommended to use a thermometer for air conditioning, heating and ventilation systems.
In domestic conditions, it can be installed in boiler rooms, and some people buy it for moonshine still. Accuracy class 2.5, the unit is able to show the temperature of a liquid or gas, has an axial connection, has good protection against moisture and dust, which meets the IP43 standard.
For the case, high-quality steel is used that does not corrode, the sleeve itself can be stainless or brass. The temperature indicator is made of aluminum alloy with a black arrow, and the dial itself is painted with white paint and is located under a tempered glass. By the way, mineral glass is used, therefore its highest strength is achieved.
pros:
- Large area of use for a thermometer.
- The size of the case is 6.3 cm in diameter.
- The use of high quality steel that is not afraid of corrosion.
- The verification period is 2 years.
- An affordable price for many within 415 rubles.
There are no significant disadvantages for a democratic price.
Watts mtg
Angular or straight alcohol device. A black indicator with white scales is located on the case. Capillary prismatic tube with blue toluene, 6 mm in diameter. The maximum measurement is possible up to 160 degrees, the manufacturer can make a thermometer with a different temperature scale for the client.
pros:
- The maximum working pressure can be up to 16 bar, which is not possible with other devices.
- Very high data accuracy with a minimum of 2 degrees error.
- Mounting thread ½ ".
- Fitting 5 cm.
The main disadvantage is only in the price, which is equal to 1600 rubles.
BT-7
A good product with the best value for money. Produced by the Russian company CJSC Rosma. The device is made for temperature measurements in industry for installation on stationary units. The thermometer can work with gas, liquids, steam, oil, which expands its capabilities. It can also be used for heating systems, ventilation, in the food industry. The accuracy class of the device is quite high, equal to 1.5.
The manufacturer has protected the case and its main parts from moisture and dust, the degree of protection meets the IP43 standard. Axial fitting, steel body with rust protection. For the dial, aluminum is used, after smelting it is painted white. There can be a choice of stainless or brass sleeve. Tempered glass is used to protect the dial. Temperature measurements are carried out in a wide range from -40 to +450 degrees.
pros:
- Extensive scope of use of the device.
- The dimensions of the thermometer are 15 cm in diameter.
- The verification period is 2 years.
- Affordable price within 700 rubles.
The model has no minuses.
Watts F + R828
Radial bimetallic thermometer made of strong and high quality plastic, which is used to create the case. Tempered glass is used to protect the indicators. The device has a good accuracy class, which is 2 for temperature and 2.5 for pressure.
On the dial, the main hand is red for easy reading of data, and there is also an automatic ½ ”shut-off valve. The maximum possible pressure is up to 4 bar. It is recommended to use the product for household needs when there are no harsh conditions and negative influence of external factors.
pros:
- The device is 8 cm in diameter.
- The optimal temperature range is 120 degrees.
Among the shortcomings, one can single out the price of the goods, which will be within 1000 rubles.
