Follow us on Twitter Follow us on LinkedIn Like us on Facebook Follow us on Instagram Visit the TPC Store
Search the site


E337 Standard Test Method for Measuring Humidity with a Psychrometer (the Measurement of Wet- and Dry-Bulb Temperatures

All Standards | ASTM Standards
Search Standards

Click to Purchase and Download this Standard or Test Method

Revision Date:
Updated On: April 01, 2002
Editorial Change:
1.1.1 This test method covers the determination of the humidity of atmospheric air by means of wet- and dry-bulb temperature readings.

1.1.2 This test method is applicable for meteorological measurements at the earth's surface, for the purpose of the testing of materials, and for the determination of the relative humidity of most standard atmospheres and test atmospheres.

1.1.3 This test method is also applicable when the temperature of the wet bulb only is required. In this case, the instrument comprises a wet-bulb thermometer only.

1.1.4 Relative humidity (rh) does not denote a unit. Uncertainties in the relative humidity are expressed in the form U + u % rh, which means that the relative humidity is expected to lie in the range ( U - )% to ( U + )%, where U is the observed relative humidity. All uncertainties are at the 95% confidence level.

(Back to all Standards)

SABRE Autonomous Solutions
Personnel are free to do other tasks while the ALPHA1 does the “dirty work”.

HoldTight Solutions Inc.
Our HoldTight®102 salt remover & flash rust
preventer prevents flash
rust by removing surface contaminants. Contact us
for your nearest distributor.
(800) 319.8802

Tarps manufacturing, Inc.
QUALITY MADE IN AMERICA —Available near you!
CLICK to get a behind-the-scenes look at how Tarps Manufacturing makes the highest-quality tarps right here in the USA — available nationwide.

Novatek Corporation
Dustless Coatings Removal
Novatek Corporation, Dustless Coatings Removal Strip, clean and profile all dust free! Comply with new lead standards. Contact today: (866) 563-7800

Carboline Company
New product: Carbozinc® 608 HB
Introducing a new high build zinc-rich primer that can save you time and money by eliminating the epoxy intermediate coat!

Mitsubishi Gas Chemical America
Performance Amine 1,3-BAC
A highly reactive cycloaliphatic diamine offering superior performance. Reasonable cost and curing efficacy makes it suitable for all types of epoxy resin applications.

NLB Corporation
NLB Sure Shroud: Greater Protection and Flexibility
NLB’s Sure Shroud’s lighter weight and flexibility reduces operator fatigue and offers unmatched protection against high pressure hose ruptures. 10k to 40k psi rated.

KTA-Tator, Inc. - Corporate Office
Instrument Service Department
Are you a QP certified contractor? KTA’s Instrument Service Department can help keep you compliant!
Click or call 1-800-KTA-GAGE.

Industrial Vacuum Equipment Corp.
Hurricane Vacuums
& Dust Collectors
Vacuum and dust collector hose, filters and related accessories.


Technology Publishing Co., 1501 Reedsdale Street, Suite 2008, Pittsburgh, PA 15233

TEL 1-412-431-8300  • FAX  1-412-431-5428  •  EMAIL

The Technology Publishing Network

Durability + Design PaintSquare the Journal of Protective Coatings & Linings Paint BidTracker

EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us