The bimetallic thermometer structure characteristics and working principle

Bimetallic thermometer is a kind of field detection instrument suitable for the measurement of low temperature, and can be used to directly measure the temperature of the gas, liquid and steam. The thermometer from the design principle and the structure has the waterproof, corrosion resistance, vibration resistance, intuitive, easy reading, no mercury pollution, durable and other characteristics, bimetallic thermometer can work in the temperature exceeds a given value, automatic signal control to cut off the power supply or the police. Can replace other form of thermometer table, widely used in petroleum, chemical industry, machinery, ships, electricity, textile, printing and dyeing and other industrial and scientific research departments. Bimetallic thermometer features: no mercury pollution, easy reading, strong shock resistance. Protection is 1 gr18ni9ti stainless steel and molybdenum titanium tubes, pressure and corrosion ability. Core-pulling thermometer can not stop short time machine maintenance or replacement. Axial, radial and 135 DHS type, universal type variety complete, bimetallic thermometer adapted to the various installation needs. Bimetallic thermometer classification: WSS series bimetallic thermometer WSSX electric contact bimetallic thermometer thermometer WTJ series bimetallic thermometer BT series cases bimetallic thermometer structure characteristics and working principle: bimetallic thermometer is made of round shape into threaded heat dual metallic piece as temperature sensing element, and put it in a protective sleeve, one end fixed ( Fixed end) And the other end, The free end) Connection on a thin shaft, shaft end is equipped with a pointer. When the temperature changes, temperature sensing element of the free end immediately rotation, thus fine axis pointer to produce angular displacement, indicates that the change in temperature on the dial; Straight table by steering transmission mechanism to drive a pointer. Due to the temperature sensing element has a linear relation with temperature changes, so the location of the bimetallic thermometer pointer indicated is measured temperature value. Watchcase material with steel, cast alloy, stainless steel plate; Detecting element also have core-pulling structure; Adjustable Angle the header part of the thermometer with the aid of the corrugated pipe, Angle of body parts, such as you can from the Angle to the straight or from the straight to the Angle at any Angle. Electric contact bimetallic thermometer is added electric contact group on the structure, adjusting device and the outlet box etc. When the temperature changes, when with the preset control steady contact ( Upper limit and lower limit) Contact or disconnected, the control circuit of relay or contactor, bimetallic thermometer so as to realize the function of automatic temperature control or alarm. Bimetallic thermometer is the use of two different metal working in the principle of expansion degree of different temperature changes. Bimetallic thermometer is mainly used in industry of element is one with two or more pieces of metal laminate composed of multilayer metal together. To improve the temperature measuring sensitivity, is usually made of metal spiral coil shape. When multi-layer metal temperature change, the layers of metal expansion or contraction, makes the spiral coil rolled up or let go. As a result of the spiral coil end fixed and the other end connected to a free rotating pointer, therefore, when the bimetallic strip feel the temperature change, Pointers can be on a circular dividing scale to indicate the temperature. The bimetallic thermometer meter measuring temperature range is 200 ~ 650 ℃, permissible error are two process about 1% of the scale. The thermometer and the rod of glass liquid thermometer USES similar, but can be used under the condition of higher mechanical strength.