Quantachrome Expands Facility, Adds Accessory

摘要

Quantachrome Instruments has added an economical and compact thermoelectric thermostatting device to its line of accessory equipment for its gas sorption instruments and gas pyc-nometers. Gas sorption instruments are used to measure surface area and pore size of porous materials and powders. While most of such measurements are done at cryogenic temperatures using liquefied gases, many applications benefit from measurements at a very different temperature such as those around room tempera- ture or the freezing point of water. These higher temperatures must still be well controlled, i.e, thermostatted. This is best done by actively cooling/heating to ensure temperature stability rather than, at 0°C for example, relying on melting ice. This is normally achieved by using refrigerated, heated circulator baths. While these perform very well and have quite wide temperature range capabilities, they are often too large, too power hungry, and simply too much for smaller thermostatting jobs.