The higher temperature Isotech Blackbody Fixed Point Cells consist of high purity metals within a graphite body. Graphite reacts with air to form Carbon Dioxide. The rate of the reaction is temperature dependant. The effect is small at low temperatures but increases at higher temperatures. For Indium and Tin cells the effect is small and for Indium, Tin and Zinc cells in general no attention needs to be made. Yet for Aluminium, Silver and Copper Cells the oxygen must be excluded or the cells would be quickly damaged. The Model 984 Gas Flow System connects between an inert gas supply, such as Argon or Nitrogen and the Cell in its apparatus. The Model 984 has a regulator and a flow meter optimised to easily set the flow to 0.2 L/min and features an audible alarm should the gas flow be interrupted....

The Gemini R 550 Portable Blackbody Calibration Source allows for calibration of noncontact infrared thermometers over the temperature range 30°C to 550°C. It is suitable for use as a primary radiation source for infrared thermometers. Laboratory performance and low uncertainty calibrations are ensured by the combination by high emissivity and excellent temperature uniformity. The digital temperature controller allows the block temperature to bet set to any value from 30°C to 550°C. Traceability of the radiance temperature is established by a separate, built-in temperature indicator and included platinum resistance thermometer. A three point traceable calibration certificate is included. UKAS calibration of the resistance thermometer is available, as is radiometric calibration. Uniformity of the block is ensured by using distributed heating technology. For the smallest of uncertainties the Gemini R may be used with Isotech ITS-90 Fixed Point Cells, Gallium 29.7646°C, Indium 156.5985°C, Tin 231.928°C and Zinc 419.527°C. The cells are provided with a certificate of metal purity....

When the high accuracy of the Gemini R is not necessary this product offers a cost effective solution for the calibration and testing of infrared thermometers. The Greybody Model 975 gives fast accurate results with a larger sensing area. A temperature sensor sits just under the target surface and controls the temperature of the source. A custom designed surface sensor is used to set the controller calibration and a traceable certificate is supplied with each source....

The Hyperion R Portable Blackbody Calibration Source allows for calibration of non-contact infrared thermometers over the temperature range -20°C to 125°C. One application is the calibration of non-contact medical thermometers. With the sudden step increase in the demand to check and calibrate medical thermometers we have supplied many units for both portable and laboratory testing relating to the coronavirus outbreak. It is suitable for use as a primary radiation source for infrared thermometers from sub zero to 125°C. Laboratory performance and low uncertainty calibrations are ensured by the combination by high emissivity and excellent temperature uniformity. The digital temperature controller allows the block temperature to be set to any value from -20°C to 125°C. Traceability of the radiance temperature is established by a separate, built-in temperature indicator and included platinum resistance thermometer. A three point traceable calibration certificate is included. UKAS calibration of the resistance thermometer is available, as is radiometric calibration. Uniformity of the block is ensured by using distributed thermoelectric heat pumps with the benefit of solid state, vibration free cooling. The Hyperion R can be used with the Gallium Fixed Point Cell, Model Number 982-05-01. Melt plateau times of five hours are easily obtainable. The cells are provided with Certificate of Metal Analysis, 6N pure – 99.9999%....

The Medusa R Blackbody Calibration Source allows for calibration of noncontact infrared thermometers over the temperature range 30°C to 550°C. It is suitable for use as a radiation source for infrared thermometers. The cavity is 45 x 285mm deep and suitable for use with the larger Isotech fixed point cells. Laboratory performance and low uncertainty calibrations are ensured by the combination by high emissivity and excellent temperature uniformity. The digital temperature controller allows the block temperature to bet set to any value from 30°C to 550°C. Uniformity of the large block is ensured by using distributed heating technology. For the smallest of uncertainties the Medusa R may be used with Isotech ITS-90 Fixed Point Cells, Gallium 29.7646°C, Indium 156.5985°C, Tin 231.928°C and Zinc 419.527°C. The cells are provided with a certificate of metal purity....

The Oberon R uses a Sodium heat Pipe to ensure an exceptionally low temperature gradient along the furnace core. It is ideal for the realization of Aluminium, Silver or Copper ITS-90 Fixed Points. It may be used as a blackbody source over the range 450°C to 1090°C. The furnace heater is of the non-inductive bird-cage design insulated by twin bore alumina tubes. The heat pipe is designed so that the inner wall is not subject to thermal expansion stresses from the outer wall before the heat pipe reaches conduction temperature. The working fluid is permanently and safely sealed within the plasma-arc welded enclosure....

The Pegasus R is a compact furnace for calibrating radiation pyrometers. The temperature of the furnace is set on a controller, whilst an independent indicator, whose sensor fits into the cavity, indicates the actual radiance temperature. The sensor can be removed for external calibration or the complete system can be calibrated. The cavity diameter is 20mm, the depth 65mm. Emissivity is 0.995. The cavity is removable and a fixed point cell may be put in its place. The cavity inside the fixed point cell is 10mm in diameter by 65mm deep to the tip of a 120° cone. Blackbody target radiation source for use with Pegasus R. For calibration radiation thermometers in the wavelength range 0.9 to 14 micrometres. A blackbody radiation source ‘based on a design study by England’s National Physical Laboratory (NPL)’ for Isothermal Technology Ltd is housed, with suitable insulation, in the Pegasus tube furnace. The aperture is 20mm in diameter. A Pegasus blackbody source has been calibrated at NPL (Nat. Physical Laboratory) with an uncertainty of ±2°C and the calibration was found to be reproducible after a period of about 2 months. A scan across the aperture at 444°C showed that the source was uniform to better than 0.3°C. Traceability may be established with a UKAS certificate for the in-built indicator and supplied probe (935-14-40)....

When the high accuracy of the Gemini R is not necessary this product offers a cost effective solution for the calibration and testing of infrared thermometers. The QuickCal Blackbody is ideal for rapid and portable checking of infrared thermometers. It features a cylindrical cavity 25mm diameter by 115mm deep....

When we considered low temperature comparison calibration, we had to take into account Health and Safety considerations, both of the liquids used in compressors to generate low temperatures and also the liquids used in the calibration volume itself. The cost of chillers increases considerably for very low temperatures. We concluded that using chillers for very low temperatures was expensive, unsafe and unreliable. Our solution is a simple heated metal block design using a single, safe surrounding liquid, liquid nitrogen. An apparatus immersed in liquid nitrogen will cool to approximately -195°C. Our design, using a controller and heater, permits the cryostat to be set at any temperature above liquid nitrogen temperature. The Cryostat comprises an insulated machined copper equalizing block inside an 80mm diameter tube 480mm long, attached via a flange to a lid giving access for three thermometers, a vacuum port and a Lemo connector for the temperature sensor and heater. A cable runs to a controller which sets the temperature. An RS422 connector permits the calibration to be automated using one of our Software programs....

Model 17402B Gallium Apparatus is not an adaptation from general purpose equipment, but is designed specifically to realize and maintain the Gallium Cell on the melt plateau, for calibration of thermometers on the International Temperature Scale of 1990. The apparatus will permit the gallium to melt coaxially over 12 to 16 hours. It is uniquely designed to also freeze the cell from the bottom up, which eliminates the danger of damage due to the expansion of gallium during freezing. Model 17401 Gallium Cell may be used in a well controlled bath without the need for the thermal environment provided by Model 17402B Gallium Apparatus. However, because of the advantages of automatic operation, convenience and cell protection, Isotech recommend the use of the Model 17402B environment in most cases. No external connections other than power are required. A completely automatic electronic control system provides a precise means for realization and maintenance of the plateau. The Apparatus can be turned on by a timer an hour before the laboratory day begins, the plateau utilized throughout the working day and the system recycled overnight. A thermal sink is provided which forces the gallium to refreeze upwards from the bottom (gallium expands when it freezes, requiring a specific freeze orientation to avoid rupturing the cell). Confidence is a major requirement in a standard. The Isothermal Gallium Cell and Apparatus have a long (20 year) history and have been successfully used in most National and Primary Laboratories world-wide. This is one of the main reasons for choosing the Isothermal Cell and Apparatus. The Cell and Apparatus are manufactured to the strict requirements of BS 5750 and ISO 9000. Each finished unit becomes part of the Isotech UKAS working Calibration Laboratory for two weeks or more, during which use the control circuits are set and checked for optimum performance. It is released only when Isotech are entirely satisfied with its performance....

Second only to the Water Triple Point and in many ways, because of its ease of use and purity, superior to it, is the Gallium Melt Point. At 29.7646°C this is a very convenient temperature. Total Confidence Confidence is a major requirement in a standard. The Isotech Gallium Cell and Apparatus have a long history and have been successfully used in most National and Primary Laboratories world-wide. International comparisons prove the quality of the Isotech Cells and are unique in the number, and history of comprehensive evaluations. Calibration of Isotech’s Reference Cell with the Standard at NIST showed an agreement of 4μK, 0.000004°C. The Isotech Gallium Cells contain the highest purity metal, >99.99999% pure (7N) and giving a flat plateau. The cell has a day to day reproducibility of just +/-0.000025°C....

Are you fed up with cold wet hands, and hours of frustration when you produce an ice mantle in your Triple Point Cell? Change your life and try the Isotech Ice Mantle Maker. It works by using a specially designed anti-gravity heat pipe. The heat pipe exits the cell and exchanges the heat/cool in a small container filled with solid carbon dioxide or preferably liquid nitrogen. Because of the low temperature gradient along the heat pipe the ice mantle is formed close to 0°C, and so beautiful strain free mantles are formed. The Mantle Maker works equally well when you wish to increase the thickness of ice at the bottom of the cell. By keeping only a cc of alcohol in the cell the heat transfer is focused around the bottom of the cell....