Constant-temperature fluid baths are offered for the calibration of thermometers and temperature sensors. The compact baths are 18 deep, and accommodate liquid-in-glass (LIG) thermometers, SPRTS and other long-stem thermometers. They do so with a small footprint of 14× 31 and a small volume of bath fluid of 15.9 l, yet the baths can easily be used to calibrate thermometers in batches of 10 or more. Models 6331, 7321, 7341 and 7381 cover temperatures from -80 C to 300 C. Stabilities over that range are from ۪.005 C to ۪.015 C and uniformities to ۪.007 C. Each bath comes with an RS232 port and Windows-based control software. The baths are compatible with the proprietary MET/TEMP II software for completely automated calibrations.