On site display temperature transmitter

On site display temperature transmitter

Industrial bimetallic thermometer is an on-site detection instrument for measuring low and medium temperatures. It can directly measure the temperature of liquid vapor and gas media within the range of -80 ℃ to+500 ℃ in various production processes. The main component of industrial bimetallic thermometers is a multi-layer metal sheet composed of two or more metal sheets stacked together, which works based on the principle that two different metals expand differently when the temperature changes. It is composed of bimetallic sheets wound into a circular curved shape. When one end expands due to heat, it drives the pointer to rotate, and the working instrument displays the temperature value corresponding to the thermoelectric potential.

Measurement: -80 ℃ -+500 ℃ range

Based on: utilizing two different metals

Temperature value: corresponding to thermoelectric potential

Stacking: Two or more metal sheets

On site display temperature transmitterIntroduction

The main component of industrial bimetallic thermometers is a multi-layer metal sheet composed of stacked metal plates. Instruments that can automatically and continuously record temperature changes are usually used to improve temperature sensitivity

The metal sheet bimetallic thermometer is made in a spiral coil shape. When the temperature of multi-layer metal sheets changes, the expansion or contraction of each layer of metal is uneven, causing the spiral coil to roll up or loosen. Due to one end of the spiral coil being fixed and the other end being connected to a freely rotating pointer, the volume changes of the two metals are different when the temperature changes, resulting in bending. One end of it is fixed, and the other end undergoes displacement with temperature changes, with the displacement being close to a linear relationship with the temperature. The self recording system consists of a self recording clock and a self recording pen. The self recording pen is connected to an amplifying lever and is operated by a sensing element. Therefore, when the bimetallic plate senses a temperature change, the pointer can indicate the temperature on a circular dividing scale. The temperature measurement range of this instrument is 200~650 ℃, and the allowable error is about 1% of the scale's two strokes. This thermometer has a similar purpose as a rod-shaped glass liquid thermometer, but can be used under conditions that require higher mechanical strength.

principle

It works by utilizing the principle that two different metals expand differently when the temperature changes. To improve temperature sensitivity, metal sheets are usually made into a spiral coil shape. When the temperature of multi-layer metal sheets changes, the expansion or contraction of each layer of metal is uneven, causing the spiral coil to roll up or loosen. Due to one end of the spiral coil being fixed and the other end being connected to a freely rotatable pointer, when the bimetallic strip senses a temperature change, the pointer can indicate the temperature on a circular scale. The temperature measurement range of this instrument is 200~650 ℃, and the allowable error is about 1% of the scale's two strokes. This thermometer has a similar purpose to the rod-shaped glass liquid thermometer, but can be used under conditions with higher mechanical strength requirements

application

Bimetallic thermometer is a field detection instrument suitable for measuring medium and low temperatures, which can be used to directly measure the temperature of liquefied and gas. Comparison between bimetallic thermometers and similar domestic products: The instrument accuracy level reaches 1.0 level, and the upper shell of the instrument is made of anti-corrosion materials. Its temperature resistance can reach up to 200 ℃, with a minimum of -40 ℃. The flange structure and double-layer sealing rubber ring have good anti-corrosion and waterproof performance. The welding of the protective tube adopts fully automatic argon gas protective tube, with a firm weld and minimal intergranular corrosion. The scale plate is an aluminum oxide printing plate with a clear and aesthetically pleasing surface. The pointer is internally adjustable. Bimetallic thermometers are available in axial, radial, universal, and other types The length of the probe of the bimetallic thermometer can be customized according to customer needs.

Widely used in industries such as petroleum, chemical, metallurgical, textile, and food. A bimetallic thermometer is an on-site detection instrument used to measure low to medium temperatures. It can directly measure the temperature of liquid vapor and gas media within the range of -80 ℃ to+500 ℃ in various production processes. On site temperature display, intuitive, convenient, safe and reliable, with a long service life; The core pulling thermometer can be maintained or replaced for a short period of time without stopping the machine. There are complete varieties of axial, radial, 135 º, universal and other types, which are suitable for various on-site installation needs.

Main parameters

Execute standard JB/T8803-1998 GB3836-83

Scale dial nominal diameter: 60100150

Accuracy level: (1.0), 1.5

Thermal response time: ≤ 40S

Protection level: IP55

Angle adjustment error: The angle adjustment error should not exceed 1.0% of its range

Return difference: The return difference of the bimetallic thermometer should not exceed the absolute value of the basic error limit

Repeatability: The repeatability limit range of bimetallic thermometers should not exceed 1/2 of the absolute value of the basic error limit