Oakton
The Oakton Division of Cole-Parmer is primarily a manufacturer of water chemistry instrumentation, but they have sold barometers and hygrothermographs.
An 2000 Oakton aneroid barometer manual is available for download here (8 pages):
An Oakton hygrothermograph manual may be downloaded here (14 pages):
An Oakton mini-hygrothermograph manual may be downloaded here (2 pages):
