Product category:
Humidity and Environmental Sensors
News Release from: Brownell | Subject: Nonreversible humidity indicator paper
Edited by the Engineeringtalk Editorial
Team on 25 October 2002
Humidity indicator paper won't hide
transients
A new nonreversible humidity indicator paper avoids the risk of misleading readings and missed signals of a temporary but potentially damaging problem.
A new Brownell nonreversible humidity indicator paper avoids the risk of misleading readings and missed signals of a temporary but potentially damaging problem not shown by conventional indicator papers that change back to a clear reading when transient high humidity levels revert to normal The nonreversible indicator records the maximum humidity exposure by changing colour from orange to a distinct and permanent brown that is stable and not affected by exposure to the same humidity but changes to indicate a higher humidity level
This article was originally published on Engineeringtalk on 14 Jun 2001 at 8.00am (UK)
Related stories
Stop harmful moisture condensation contamination
Brownell manufactures a wide range of tank vent dryers and adsorbents which prevent valuable fluids from being contaminated by harmful moisture condensation.
Increments of 10% relative humidity can be detected over a range of 50 to 90% RH.
These indicators are available in cards for installation into boxes and packages or in panel mounting housings for pipeline and enclosure monitoring applications.
Conventional paper indicates humidity by changing from 'dry' blue to 'wet' pink in a process that is fully reversible and most commonly used to signal when an adsorption agent is active or saturated.
It leaves no record of temporarily high relative humidity levels that often cause equipment failure or temporary malfunction caused by corrosion, condensation and icing.
Similarly, it does not indicate temporary malfunctions from water vapour condensing and causing an electrical short circuit or fogging of an optical instrument which subsequently 'clears' when the temperature change causes the humidity to change. Request a free brochure from Brownell ...
• Brownell: contact details and other news
• Email this article to a colleague
• Register for the free Engineeringtalk email newsletter
• Engineeringtalk Home Page
