Economy bimetal models dial size connections peb 212 12 npt brass thermowell peb140 4 peb2 212 b rass wet lfo 34te peb142 4 case zinc plated steel ring 304 stainless steel stem brass, 9mm diameter. Lets talk about how a bimetal thermometer works and how theyre set up. Process industrial bimetal thermometer with steel case. An expansion temperature gauge consists of a temperature sensor, a capillary and a bourdon tube. Bimetal dial thermometer general instruments consortium.
The required manual reading of the liquidinglass thermometer often induces errors far. The strip consists of two strips of different metals which expand at different rates as they are heated. Product drawing mounting 1 dial size parameters a b c 100 100 110 21 d. The correction is for the temperature of the gauge, not the temperature of the measured medium. Bimetallic devices take advantage of the expansion of metals when they are he. If a thermostatic bimetal element is initially straight or has an initial uniform curvature, the resulting curvature for uniform temperature change is uniform. The maximum length recommended for bimetallic temperature gauge should be taken as 700 mm. Back connect thermometers are ideal for local, eyelevel temperature readings in most process applications. Since my grandfather harry germanow started making household products in 1916 to todays temperature and pressure instruments, serving industrial, commercial, and oem markets, our tradition has been to.
There is a long history of superior quality in engineering, manufacturing and customer service of these products. This emphasizes key information for efficient, fault free operation. Bimetal temperature gauges are available with a scale range of 70. Bimetal dial thermometers are simple in construction, but rugged. Consult ashcrofts ei bimetal thermometer brochure on directindustry. Bimetal element varies with temperature range dampening media silicone free inert gel lens gasket neoprene dial ranges 500f 260c and under. As a temperature measuring device, the bimetallic element, similar in design to that of the actuator. Bimetal plus b i m e t a l t h e r m o m e t e r s all dimensions are nominal. They are used in almost every area of manufacturing, but are especially suited for laboratories, food processing, concrete, asphalt and oem equipment. Ei bimetal thermometer ashcroft pdf catalogs technical.
The great success of the bimetal thermometer is due to its outstanding. The hermeticallysealed case offers protection from weather and dust and is guaranteed against fogging up. This condition shows up as a failure of the thermometer to read accurately below 32f or 0c. The curvature of the bimetal changes in response to temperature variations, and this. Bimetal dial thermometers are simple in construction, yet rugged. An antiparallax feature allows for errorfree reading. Liquidfilled gauges preventmoistur condensation build up. An extremely responsive temperature sensing helix which has been carefully sized and tested, heat treated and aged to relieve inherent stresses and ensure continued accuracy. Now were going to talk about winters tbm series, which is the bimetal thermometer. A bimetallic strip is made up of metal a and b, having different thermal expansion coefficient.
Noshok guarantees all products to be free from defects in material and workmanship, to remain. Digital temperature gauge with rtd and thermocouple input. The range of bimetallic temperature gauges from hma instrumentation are designed for accurate temperature measurement, featuring a reliable, robust design for industrial purposes. Bimetal thermometers operating below freezing must have a perfectly tight case to prevent entrance of moisture which eventually will condense and freeze inside the stem. Product drawing mounting 1 dial size parameters a b c 100 100 110 21 d 689. The bimetal thermometer was designed to be a less accurate, but more rugged measuring device than the glass thermometer. Bimetal thermometers are available with a wide range of options, and can offer accurate visual temperature readings from 70600c. Bimetal thermometers are a simple and cost effective way to achieve a visual indication of temperature in a process. The sensor signal, proportional to the deflection, is converted to an electrical output signal via an amplifier us patent no. Temperature variations cause the bimetal strip to unwind or wind tighter, which in turn rotates the pointer. Epdm dial ranges over 500f 260c lens glass, polycarbonate, or safety glass wetted components listed in italics. Adjustable angle bimetal thermometer reotemp instruments. Pressure transmitters level sensors data loggers strain.
The bimetal system is helically wound and heat treated for long term stability. Noshok type 150 bimetal thermometers are high quality, costeffective, and designed for general purpose testing applications or where a weatherresistant, tamperproof case is required. Ei series bimetal thermometers features 1% full span accuracy asme b40. The highquality thermometer has been designed especially for the requirements of the process industry. Guaranteed to be accurate to within 1% of full scale grade a per asme b40. A bimetallic strip is used to convert a temperature change into mechanical displacement. Trend bimetal thermometers are ideal for most rugged industrial temperature measurement applications. Economy bimetal models dial size connections peb 212 12 npt brass thermowell peb140 4 peb2 212 b rass wet lfo 34te peb142 4 case zinc plated steel. Whether its a thermometer or a thermocouple, different kinds of sensors.
The bimetal type temperature gauge series tetrotemp 100, are made of two cold welded metal strips with different thermal expansion coefficient. The rototherm range of heavyduty bimetallic thermometers from. The speciallydesigned head provides for 180 movement, allowing users to set the best position for maximum readability upon installation. The bimetal thermometer measures by thermal expansion. Stainless steel pressure gauges also available in different styles and pressure ranges. All sales subject to standard terms and conditions. Xs1 silicone free xyw 316 ss housing4 and stem 1 2560 lengths available. Since my grandfather harry germanow started making household products in 1916 to todays temperature and pressure instruments, serving industrial, commercial, and oem markets, our tradition has been to meet or exceed customer expectations. The resultant expansion of bimetal is proportional to temperature. Bimetal thermometer for the process industry per en 190. Bimetal thermometers generally come in 304 stainless steel cases. Otherwise known as a bimetallic dial thermometer, they operate by employing the use of two dissimilar metals that react to temperature at. Ashcroft bimetal thermometers and gas actuated thermometers provide easytoread temperature measurement on a dial indicator.
Teltru sanitary pressure gauges are engineered to meet the stringent performance and material demands within dairy, food, chemical, biotechnology and pharmaceutical environments. The measuring system itself is filled with a liquid. The transistor as a temperature sensor thermal properties. 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. The model 55 bimetal thermometer has been developed and is manufactured in accordance with the en 190 standard. Two metal strips of identical length at a given temperature having high. Types of temperature gauges for temperature measurement. 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 together to form a bimetal. Switch contacts built into mechanical temperature measuring instruments close or open. The bimetal helix is coated with a viscous silicone to minimize pointer oscillation and improve temperature transmission. Wika s unique twin temp thermometers combine the accuracy, reliability and easy to read dial of a bimetal thermometer with the precision readout and data. Bimetal thermometer model 55, highquality process version. Expansion temperature gauge an expansion temperature gauge consists of a temperature sensor, a capillary and a bourdon tube. The different expansions force the flat strip to bend one way if heated, and in the opposite direction if cooled below its initial temperature.
The resultant expansion of bimetal is proportional to temperature that is sensed. They are built to resist the most severe operating conditions created by the ambient environment and the process medium. Noshoks eight year warranty applies to our 3 and 5 300 series bimetal thermometers. Plumbing heating temperature, pressure instruments cooling. Furthermore, other than heat measurement, the bimetal temperature gauge are also vital when dealing with areas that require temperature regulations like in the storage of perishable products. Versions are available with up to ip68 ingress protection and atex versions are avialable for use in potentially epxplosive atmospheres. An antiparallax feature allows for error free reading.
Data sheet bdtb18 bimetal thermometer page 3 of 4 drawings and dimension bdtb18 d drawings dimensions ns d d1 l h s s1 63 68 63 15. The bimetallic thermometer uses the bimetallic strip which converts the temperature into the mechanical displacement. Mm minmax pointer this is a manual indicator that is moved by the temperature indicator and shows the max. These thermometers use the following two principles. Instruction manual bimetal thermometer model a ashcroft. Temperature gauges operate on the gasactuated, bimetal or expansion principle. The platinum measurement winding is placed stress free in a slot in a plastic band and. Thermometer winters bimetallic thermometer trupply llc. Bimetal thermometers all stainless steel construction ds 4. Bimetal thermometers all stainless steel construction ds. When the temperature changes, the free end of the temperature sensor. All metals change in dimension, that is expand or contract when there is a change in temperature.
For this reason it is important to avoid damage to the glass front while the. Bimetallic thermometer hereafter referred to as simply thermometer is a coiling. Especially in the chemical and petrochemical, oil and gas, and power engineering industries, the temperature measuring. Wmo recommends to measure atmospheric temperature at the height from. Bimetal thermometers all stainless steel construction ds 4, 5, 6 100125150 mm these instruments are designed for use in chemical, petrolchemical processing industries. Two metal strips of identical length at a given temperature having high and low coefficients of thermal expansion. External adjustment permits zero reset from outside the case. Bimetal thermometers are actuated by a helical bimetal while gasactuated thermometers use expanding or contracting gas in a closed bulb and capillary system. They are used for measurement of temperature in most of the industrial applications. Bimetal stainless steel thermometer with bottom or back entry and anyangle versions available. This thermometer is the most common used in, mainly, the industrial application. This highquality thermometer has been designed especially for the requirements of the process industry.
127 173 730 965 590 1501 1040 51 519 707 1267 602 636 661 376 218 1018 652 28 17 96 1247 1118 312