Bimetal thermometer for industrial applications models a52. A bimetallic strip is also used in a recording thermometer. Bimetal dial thermometers are simple in construction, yet rugged. Instead of being a mixture of two or more metals, like alloys, bimetallic objects consist of layers of different metals.
The model a50 bimetal thermometer is used mainly in heating, airconditioning, ventilation and refrigeration technology and is suitable for a scale range up to 200 c. Temperature and pressure measurement and precision temperature instruments for industrial applications. Provision should be made for extreme temperature conditions. How to calibrate a bimetallic stemmed thermometer using. This heater melts any frost before it can accumulate and evaporates the moisture away. For more information and resources on food safety, visit. Download tbm bimetal thermometer siamrtd book pdf free download link or read online here in pdf. Bimetal thermometers are ideal for local, eyelevel temperature readings in most process applications. Can be used for intermittent service from 800 to f, or 425 to 500c. The liquidinglass thermometer is a contacttype thermometer which measures temperature from changes in the volume of a liquid. These thermometers are rugged and preferred by the process, offshore, power, pharmaceutical and chemical industries.
The free end of the strip is connected to the pointer. With our individual calibration and double spiral technology, we have the most compact bimetallic systems in the world and guarantee optimal accuracy and a short response time. The bimetal thermometer employs a bimetal strip in the form of helix it works on the principle of thermal expansion two metals having different coefficient of expansions are joined to form a bimetal. Ei series bimetal thermometers ei dimensions dual scale ranges available for all standard f ranges 3. Bc450r, bc550r, gt300r, gt400r, and gt500r manufactured and sold by us to be free from defects in material and workmanship under normal use and service. The two metal strips are joined together by brazing, welding or reveting so that the relative motion between them is arrested. Series bt bimetal thermometer 2, 3 or 5 dial, dual scale, 1% fs accuracy, external reset the series bt bimetal thermometersoffer accurate, reliable service even in the toughest environments. Teltrus worldclass philosophy encompasses both the latest stateoftheart equipment and manufacturing processes and a customercentric staff and culture.
Xs1 silicone free 1 special or longer length available, consult factory 2 dual scale avilable with 3. Heat engines are not the most efficient ones, and with the use of bimetallic strips the efficiency of the heat engines is even lower as there is no chamber to contain the heat. Thermometers industrial thermometers bimetal thermometers vapor thermometers drum thermometers digital thermometers. This datasheet can specify thermometers with a single or double helix bimetal temperature sensor and electrical alarm contacts. These corrosion resistant units are constructed from stainless steel and are hermetically sealed to prevent crystal fogging. All metals change in dimension, that is expand or contract when there is a change in temperature. The bimetal thermometers are mounted into the respective application with screwin thermowells.
Materials of construction component material stem 304 ss case, bezel, staff rod, bellows, bracket, screws 304 ss adjustment screw 303 ss oring silicone dial, pointer aluminum bimetal element varies with temperature range dampening silicone free inert gel lens gasket neoprene dial. This warranty shall be null and void if the thermometer is exposed or. This series has a hermetic seal and an external adjustment in the rear of the case. Each coil is silicone dampened for improved vibration resistance. Buy products related to bimetal thermometer products and see what customers say about bimetal thermometer products on free delivery possible on eligible purchases. The bimetallic thermometer uses the bimetallic strip which converts the temperature into the mechanical displacement. The history of temperature measurement, glass tube thermometers, bimetal thermometers, thermistors, resistance temperature detector, temperature conversion worksheet. Bimetal dial thermometer general instruments consortium.
Bimetallic thermometer instrumentation and control. An ideal choice for accurate temperature measurement. Ei bimetal thermometer ashcroft pdf catalogs technical. Series bt bimetal thermometer is accurate and reliable even. The rate at which this expansion or contraction takes place depend on the temperature coefficient of expansion of the metal and this temperature. Bimetal thermometers use two strips of different metals to convert temperature into mechanical displacement. Ei series bimetal thermometers ashcroft pdf catalogs. The bimetallic strip is in the form of a cantilever beam. Palmer design, quality, and craftsmanship make the palmer all star bimetal thermometer an industry standard for rugged reliability and accuracy.
Back connect thermometers are ideal for local, eyelevel temperature readings in most process applications. This warranty shall be null and void if the thermometer is exposed or subjected. Trimetal and tetrametal refer to objects composed of three and four separate metals respectively. Reotemp sells through a mature distribution network that reaches all 50 states and 30 countries worldwide.
These thermometers are ideal for side and elevated installations on tops or sides of tanks or pipes. A bimetallic strip is made of two thin strips of metals which have different coefficients of expansion. They are often used in food and beverage preparation, process temperature measurement, wastewater treatment, boiler systems, and other places. These thermometers use the following two principles. The model a52, r52 bimetal thermometers are the entrylevel model among process thermometers. Reotemp is a globally recognized iso 9001 registered manufacturer of temperature and pressure instrumentation. The bimetal element directly drives pointer, eliminating gears and linkage. A bimetallic strip is made of two thin strips of metals which have different coeffcients of expansion. Some of the worksheets below are free thermometer worksheets reading a thermometer in degrees fahrenheit, temperature measurement.
A bimetallic dial thermometer, commonly known as a bimetal thermometer, is installed at the point of measurement and is usually read from that location. Bimetal thermometers are inexpensive, simple, and durable. Bimetallic thermometer article about bimetallic thermometer. The most widely used method to calibrate a thermometer.
Temperature measurement devices, bimetal thermometers. Xs1 silicone free xyw 316 ss housing4 and stem 1 25. The target markets of this thermometer are airconditioning and machine building. This product brochure provides you with a view of teltru quality as well as all the information you need to select the bimetal thermometer most appropriate for your application. The scale is calibrated to read temperature directly. Instructions for the installation and use of lenz bimetal dial thermometers general when removing the thermometer from the packing box, handle it by the case assembly or the fitting. Xs1 silicone free xyw 316ss housing4 and stem 1 25. Bimetal disc thermostats are thermally actuated switches. Temperature ranges standard fahrenheit and celsius ranges have been established to encompass all normal temperature measurement requirements. The resultant expansion of bimetal is proportional to temperature.
The deflection of the strip shows the variation of temperature. Bimetallthermometer standardausfuhrung typ a50 wika. As a physical unit, temperature cannot be measured directly, only by means of a process involving a change in temperature. These tamperproof instruments are an excellent choice when an external recalibrator or pointer adjustment are not required. Consult ashcrofts ei series bimetal thermometers brochure on. Such stripe, formed and aged, moves the pointer in the thermometer directly. External adjustment allows quick, limited span adjustments. Data sheet ei series bimetal thermometers ei series selection table case size ei series dual scale ranges stem lengths available s code length code inches r 21. Mar 22, 2020 industrial bimetal thermometer 3 face x 4 stem. The bimetallic thermometer consists of a bimetallic strip. Table of contents quality and performance features.
Bimetal refers to an object that is composed of two separate metals joined together. There is a long history of superior quality in engineering, manufacturing and customer service of these products. Use ashcroft duratemp thermometers for ranges above and below those listed above. Recommendations for checking the calibration of bimetal thermometer. Did you ever wonder why your frost free freezer is indeed frost free. Model 52 is manufactured in accordance with en 190 and already offers a stainless steel case and accuracy class 1 for nominal sizes 60 mm. Wherever possible, a miljoco bimetal thermometer should be installed in a thermowell to help protect the stem against fluid erosion, corrosion or other hazards.
Bimetal thermometer 2 rear connection general specifications miljoco 2 rear connected bimetal thermometers feature a compact design and economical price. Two metal stripes of extreme heat expansion are welded together in a special process. A bimetal thermometer can be used at an operating temperature anywhere throughout its dial range. Choose your product specifications and options below to configure your product. All books are in clear copy here, and all files are secure so dont worry about it. Feel free to use the function similar device request or contact their sales contact. Use ashcroft duratemp thermometers for ranges above and. The thermometer is simple in construction, robust and less expensive. Mercury is most commonly used as a thermometric liquid, but also several organic liquids are utilized to cover different temperature ranges toluene, ethanol, xylene, pentane, etc. Its because inside every one of these appliances is a heater. Everyangle thermowells must be used on all pressure or velocity applications, to protect the stem of thermometer from corrosion. All star 316ss bimetal thermometers are now available. Back connect bimetal thermometer reotemp instruments. They are available in a variety of mounting styles and can be mounted in vessels or pipes using pipethread mounts.
Temperature measurement devices, bimetal thermometers and. Temperature measurement devices 1 thermometers thermowells temperature measurement devices bimetal thermometers and thermowells accurate to 1 % of full scale in accordance with asme b40. Especially in the chemical and petrochemical, oil and gas, power engineering and shipbuilding industries, the temperature measuring instrument manufactured from. Read online tbm bimetal thermometer siamrtd book pdf free download link book now. Bimetal thermometer process version per en 190 model. Do not bend the stem this will cause misalignment of the internal parts, resulting in permanent damage. A liquidinglass thermometer consists of a capillary glass tube with a bulb at one end filled with a thermometric liquid, vacuumed and sealed. This breaks or completes the electrical circuit that has been applied to the thermostat. They can be recalibrated with a turn of the calibration screw on the back of the dial. Configure product now request a quote back connect bimetal thermometer reotemps bimetal thermometers are reliable and accurate temperature sensors requiring no electricity or wiring. The working of the bimetallic strip depends on the thermal expansion property of the metal. Click once on the download button to download the data sheet in excel format. The different metals, often steel and copper or steel and brass, are joined together throughout their length and will expand at different rates as they are heated. Usually, mercury or some kind of alcohol is used for the liquid.
Bimetal thermowells series 3 and 5 gauge accessories. Each ashcroft industrial bimetal thermometer is backed by a limited five year warranty. The series bt bimetal thermometersoffer accurate, reliable service even in the toughest environments. The thermal expansion is the tendency of metal in which the volume of metal changes with the variation in temperature. Industrial bimetal thermometer 3 face x 4 stem, 0250 w. Stem length standard features on the shown bimetal thermometers. The thermometer gives the less accurate result while measuring the low temperature. Typically, bimetal thermometers are used in industrial applications in which ease of viewing temperature is preferred. How to calibrate a bimetallic stemmed thermometer using the icepoint method thermometers should be calibrated regularly to make sure the readings are correct. This site is like a library, you could find million book here by using. There are three basic types of thermostat switch actions. All stainless steel construction, hermetically sealed asme b40. An increase in temperature will result in the deflection of the free end of the strip as shown i diagram. Bimetallic thermometer an overview sciencedirect topics.
Designed for deepwater drilling, offshore riggs and other rugged outdoor applications. Bimetal thermometer datasheet free specification sheet templates for excel and pdf. The most commonly used principles in the wika production are highlighted below. When the bimetal disc is exposed to its predetermined calibration temperature, it snaps and either opens or closes a set of contacts. Sep 24, 2010 the bimetallic thermometer consists of a bimetallic strip. Breguets thermometer consists of a trimetallic helix in order to have a more accurate result. Pressure gauges commercial gauges industrial gauges specialty gauges gauge accessories. From our beginnings, making household thermometers up to our latest products serving the industrial, commercial, food service, and oem marketswe have always put the customer first. Our thermometers are idea for local, eyelevel temperature readings in most process applications.
On the one hand, this protects the instrument, on the other hand, the measuring. All sales subject to standard terms and conditions. Lead free lead free pressure gauges lead free thermometers ul certified water quality. The model tg54 bimetal thermometer has been developed. As purely mechanical devices, they display only the current temperature on their dial. E marshall instruments offers 3 heavy duty, industrial bimetallic thermometers. Instructions for the installation and use of lenz bimetal. As the temperature rises, the liquid expands, moving up the tube. Temperature range ei dimensions dial connection size location 2. Teltru manufacturing company sanitary bimetal thermometers this heavy duty thermometer meets 3a sanitary standard 7407 requirements for sensors and sensor fittings and connectors used in milk and milk products. Ei series bimetal thermometers features 1% full span accuracy asme b40. The bimetal thermometer is a temperature gauge whose principle of measuring is based on the different expansion of metals. Bimetal thermometers are economical and offer fair accuracy.
Winters instruments tbm bimetal thermometer 1 25mm dial, fixed centre back temperature range 5 stem length code. The thermometer meets the high requirements of the process industries. Never install the thermometer directly into a pressurized application. Reotemps bimetallic bimetal thermometers are reliable and accurate temperature sensors requiring no electricity or wiring. External adjustment permits zero reset from outside the case.
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