Teach you how to choose a temperature meter

Abstract: Teach you how to select the temperature instrument information provided by the excellent flowmeter and flowmeter manufacturers. With the improvement of the factory's new machine trial repair, more and more temperature meters need to be purchased. Now, we will systematically analyze the selection of the meters, and introduce them from the perspectives of economy, function, use, application environment, etc., to provide you with help. One is the contact temperature commonly used in industry. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is an article that teaches you how to select a temperature meter. With the improvement of the factory's new machine trial repair, more and more temperature meters need to be purchased. Now, we will systematically analyze the selection of the meters, and introduce them from the perspectives of economy, function, use, application environment, etc., to provide you with help. First, the selection principles of contact thermometers commonly used in the industry: (1) meet the requirements for temperature measurement range; (2) meet the requirements for temperature measurement accuracy; (3) meet the requirements for indication, recording and alarming and temperature control requirements; (4) to meet the requirements of the use of environmental conditions; (5) to meet the above premise to select low-cost, durable and easy maintenance of the instrument. Glass thermometers are generally used in the range of 0 to 300 °C, and are divided into ordinary and precision. Thermometer for precision measurement: Grade 0.5 or 0.25 should be selected. The linearity is good, the response is general, only for on-site display, no need to match other instruments, the live contact can be used for position control. It has the advantages of simple structure, convenient use, low price and high precision, but it is inconvenient for long-distance temperature measurement, the structure is fragile and fragile, it is not allowed to exceed the upper limit of the thermometer, and it cannot be connected with recording and control instruments. The general use range of pressure type thermometers is 0~125℃, which is divided into gas type and liquid type. The use range of gas type is -100~500℃, 1.0~1.5% accuracy. precision. The structure is simple, the price is average, and the shock resistance is good. It can measure the temperature of gas, liquid and steam in the equipment at a short distance. The scale of the meter is clear. The live contact can be used for position control. , the accuracy is not too high, avoid using the position of the first 1/3 of the scale, and cannot be connected with recording and control instruments. Bimetal thermometers are suitable for field detection industrial instruments that measure medium and low temperatures, and can be used to directly measure the temperature of gases, liquids, and steam. The linearity is good, the response is slow, and the accuracy is low. It is only used for on-site display, and cannot be connected with recording and control instruments. The live contacts can be used for position control. Compared with industrial mercury thermometers, they have the advantages of no mercury damage, easy reading, robustness and vibration resistance, and can replace industrial glass mercury thermometers. Thermocouple 1. Detection (measurement) element Thermocouple is one of the most commonly used temperature detection elements in the industry. Must be equipped with secondary instrument, its advantages are: First, the measurement accuracy is high. Because the thermocouple is in direct contact with the measured object, it is not affected by the intermediate medium. Second, the measurement range is wide. Commonly used thermocouples can be continuously measured from -50 to +1600 °C, and some special thermocouples can be measured at a minimum of -269 °C (such as gold-iron-nickel-chromium) and a maximum of +2800 °C (such as tungsten-rhenium). Third, the structure is simple and easy to use. Thermocouples are usually composed of two different metal wires, and are not limited by size and beginning, and have a protective sleeve outside, which is very convenient to use. 2. According to the temperature measurement range and accuracy, the thermocouple with the corresponding graduation number is selected. The temperature is 1300~1800℃. When the accuracy is required to be relatively high, the B-type thermocouple is generally selected; the accuracy is not high, and the atmosphere is allowed to use tungsten rhenium. Thermocouples, generally use tungsten-rhenium thermocouples above 1800 °C; use temperature at 1000~1300 °C, which requires higher accuracy and higher available S-type thermocouples and N-type thermocouples; generally use K-type thermocouples and N-type thermocouples below 1000 °C Thermocouple, E-type thermocouple is generally used below 400℃; T-type thermocouple is generally used for measurement at 250℃ and negative temperature. T-type thermocouple is stable and accurate at low temperature. 3. Selection of the atmosphere used S-type, B-type, K-type thermocouples are suitable for use in strong oxidizing and weak reducing atmospheres, J-type and T-type thermocouples are suitable for weak oxidizing and reducing atmospheres, if the air tightness is compared A good protective tube has less stringent requirements on the atmosphere. 4. Selection of type The assembled thermocouple is suitable for general occasions; the armored thermocouple is suitable for the occasions requiring vibration resistance or shock resistance, and the need to improve the response speed.

fork density meter manufacturer are required in the manufacture of almost every product and endress hauser coriolis mass flow meter mass flow meter is one of the most common machines.

Beijing Sincerity Automatic Equipment Co., Ltd’s mission is to provide high quality care and services to our members and to be profitable in the process.

When you choose to buy instead of digital fork density meter, the money you save may allow you to buy multiple other necessities, more than you had initially planned on buying.

With the help of a electromagnetic flow meter slurry mass flow meter, u shape coriolis mass flow meter becomes a reasonably easy job that you can take care of simply and swiftly.