WSS-401 bimetal thermometer working conditions Thermometer type workplace Temperature °C Relative humidity% ordinary Covering place -25 to +55 5 to 100% Outdoor places -40 to +85 5 to 100% -40 to +55 <85 In order to ensure the correct development of the thermometer, readings, should be avoided in the vibration or pulsation occasions Vitamin B6 Food Additives,B Vitamins,Vitamin B6 Usp,Nutritional Additives Shandong Fortune Spring International Trade Co., Ltd , https://www.sdfortunespring.com
Electrical contact type
WSS-401 Bimetal Thermometer Structural Features and Working Principle
WSS-401 bimetal thermometer is an on-site measuring instrument suitable for measuring medium and low temperature, which can be used to directly measure the temperature of gas, liquid and steam. The thermometer has the characteristics of waterproof, anti-corrosion, shock-resistant, intuitive, easy to read, mercury-free, durable, etc. from the design principle and structure. The bimetal thermometer can automatically send a control signal to cut off the power supply when the working temperature exceeds a given value. Or alarm. It can replace other shape measuring instruments and widely used in petroleum, chemical, machinery, shipbuilding, power generation, textile, printing and dyeing and other industrial and scientific research departments.
WSS-401 Bimetal Thermometer Features:
No mercury, easy to read, strong and shock resistant.
The protection pipes are 1Gr18Ni9Ti stainless steel and molybdenum dititanium, which have strong pressure resistance and corrosion resistance.
Core-pull thermometers can maintain or replace the movement for a short time without stopping the machine.
Axial type, radial type, 135 type, universal type and other varieties are complete. The bimetal thermometer is suitable for various on-site installations.
Bimetal thermometer structural features and working principle:
The bimetal thermometer uses a thermal bimetallic strip wound in a spiral shape as a temperature sensing element and is mounted in a protective sleeve with one end fixed (fixed end) and the other end (free end) connected to a thin shaft. The shaft end is equipped with a pointer. When the temperature changes, the free end of the temperature sensing element rotates, so that the fine axis drives the pointer to produce angular displacement, indicating the change of temperature on the dial; the straight type table drives the pointer through the steering transmission mechanism. Since the temperature sensing element has a linear relationship with the temperature change, the position indicated by the bimetal thermometer pointer is the measured temperature value. The case materials include steel plate, cast alloy and stainless steel plate; the detection element also has a core-pull structure; the head part of the adjustable angle thermometer can be changed from angle type to straight type or from straight type by means of bellows, corner mechanism and other parts. Type to angle change at any angle.
Electrical contact bimetal thermometers add electrical contacts, adjustment devices, and outlet boxes to the structure. When the temperature changes, the relay or contactor in the control circuit is actuated when contact with or disconnection from the preset temperature-controlled contact (upper limit and lower limit), the bimetal thermometer achieves automatic temperature control or alarm The function.
Bimetal thermometers work by using the principle of different degrees of expansion when two different metals change in temperature. The main component of an industrial bimetal thermometer is a multi-layer metal sheet composed of two or more metal sheets laminated together. In order to improve the sensitivity of temperature measurement, the metal sheet is usually made into a spiral roll shape. When the temperature of the multilayer metal sheet is changed, the amount of metal expansion or contraction of each layer is not equal, so that the spiral roll is rolled up or loosened. Since one end of the spiral coil is fixed and the other end is connected to a freely rotatable pointer, when the bimetal feels a temperature change, the pointer can indicate the temperature on a circular graduated scale. The temperature range of this bimetal thermometer is 200~650°C, and the allowable error is about 1% of the two-way scale. This thermometer is similar to a rod-shaped glass liquid thermometer, but it can be used under higher mechanical strength requirements.