Ovens, Furnaces and Heating Equipment


New Solution for Profi ling Vacuum Ovens and Furnaces


New Hotplate Stirrers Deliver Upmost Levels of Control


Stuart is expanding its already successful range of Undergrad hotplate stirrers with two innovative digital models. In order to deliver the highest levels of control and accuracy, the new models include a LED display with an exact, continuous read out of the surface temperature. Combined with the existing features of the Undergrad hotplate range, these latest additions mean researchers have even greater control over their experiments and processes.


The new Undergrad hotplate stirrers come in two materials - ceramic and ceramic coated metal. Both employ the features of the existing Undergrad range, including minimal storage and footprint, with a recess underneath that accommodates a retort stand. This reduces the time spent assembling apparatus. In addition, an independent hot light clearly shows when instrument temperature is over 50˚C, even when the unit is unplugged.


Datapaq provides the first ever temperature profiling system designed specifically for use in hot vacuum processes. Measuring accurate product temperatures in these processes has always been a challenge as the airlocks and seals prevent the use of trailing thermocouples. The Datapaq in-process profiler passes through the process chambers along with the product being measured. It uses short thermocouples to take measurements directly from the product at all stages of the process. Thus, users can check uniformity of heating at every stage of the process and optimise the process settings to improve both product quality and production yields. Up to six thermocouples are attached to the Q18 data logger which records detailed temperature profiles. The logger is protected from the heat of the furnace by a revolutionary low-height reflective-plate technology thermal barrier (type VB7400) that has been designed to ensure there is no outgassing. As a consequence of this, profiling can be conducted regularly with minimal process disruption. The system is completed by the comprehensive Insight analysis software. This easy to use software translates the temperature readings into meaningful information quickly, clearly and easily, enabling the engineers to focus on optimising the process.


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“The Stuart range has always been focused on providing reliable, precise equipment that meet requirements across a range of applications,” said


Jackie Taylor, Product Manager at Bibby Scientific. “With the introduction of two new Undergrad hotplate stirrers, we are pleased to be able to offer even more accurate heaters for users who need exceptional levels of control.”


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Precision Temperature Controller with User-Friendly Software and Data Retrieval


Model 5R7-388 RoHS Compliant controller from Oven Industries is a bi-directional control for independent thermoelectric modules or in conjunction with auxiliary or supplemental resistive heaters for both cooling and heating applications. The ‘H’ bridge configuration of the solid state MOSFET output devices allows for the bi-directional flow of current through the thermoelectric modules. Highly efficient N-channel output devices are used for this control mode.


This controller is PC programmable via an RS232 communication port for direct interface with a compatible PC. The easily accessible communications link permits a variety of operational mode configurations. Field selectable parameters or data acquisition in a half duplex mode can be performed. This controller will accept a communications cable length in accordance with RS232 interface speciations. Once the desired set parameters are established, the PC may be disconnected and Model 5R7-388 becomes a unique, stand alone controller. All parameter settings are retained in non-volatile memory.


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New System for Determining the CO2 Reactivity of Petroleum Coke in Accordance with ISO 12981-1


The low weight of aluminium is often used to reduce the energy costs of manufactured products over their lifetime. This makes the production of aluminium increasingly important for the future. ISO 12981-1 is a method to determine (by loss in mass) the reactivity of calcined petroleum coke, used in the manufacture of anodes for the production of aluminium, to carbon dioxide. Carbolite has designed a special furnace for this application.


During the heating process, the vertical single zone tube furnace heats to 1000°C in well under an hour and is maintained at this temperature with an accuracy of ±1°C. The system is controlled by a high-quality digital PID controller; a separate over temperature protection controller prevents overheating of the system. The temperature inside the quartz tube is continuously monitored by a thermocouple. When the temperature is stable and measurement can commence an audible alarm sounds.


A CO2 gas control system is incorporated which adjusts the supply pressure and gas flow rate by a digital mass flow controller. The CO2 gas flow is maintained in the quartz tube during analysis at a constant 50 l/h; the gas is switched by digital outputs in the temperature controller.


At a temperature of 1000°C, the CO2 gas reacts with the coke to form carbon monoxide. This results in a weight loss of the sample which is used to determine the quality of the petroleum coke. Carbolite manufactures complete custom-built solutions for quality assurance of high purity petroleum products for the petroleum and aluminium industries.


29958pr@reply-direct.com Powerful Temperature Control Systems


Julabo presents the PRESTO® model series W91 and W92: the particularly strong, highly dynamic temperature control systems of the newly developed PRESTO® family. They unite high efficiency with unequalled power, e.g. for reactor systems, mini plants, pilot plants, kilo labs, vacuum chambers and many more.


The PRESTO® W91 and W92 cover a working temperature range from -92°C to +250°C. They provide up to 31 kW cooling capacity and up to 36 kW heating capacity, and they are robust and reliable even at high room temperatures up to +40°C. Highly efficient components in all instruments compensate for exothermic and endothermic reactions extremely fast.


Powerful, maintenance-free pumps deliver up to 5.5 bar / 80 l/min. They guarantee high flow rates with constant pressure and dynamically balance viscosity changes of the bath fluid.


The integrated 5.7’’ colour, industrial touch screen of the new PRESTO® ensures high operating comfort and intuitive user guidance. Clearly structured display of values and graphs, all information at a glance, explicit and easy to understand warning and help texts. All these are only a few of the many advantages.


Multiple interfaces permit flexible application, e.g. control and regulation via an USB interface, data logging via USB or SD card, integration into bus solutions (e.g. profibus), and remote control across Ethernet networks or the remote control via Julabo’s WirelessTEMP solution.


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