Sensor

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Anonymous Poster #1	Sensor 09/02/2011 11:33 PM
	Hello, any one could provide some light? TWA Alarm(ppm) meant for? STEL Alarm(ppm) meant for? Regards Kumaran
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dabdool Commentator Join Date: Mar 2009 Posts: 61 Good Answers: 3	#1 Re: sensor 09/02/2011 11:59 PM
	In the time it would have taken you to create this post you could have googled it and found the answer.
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Hendrik Guru Join Date: Jan 2007 Location: Centurion, South Africa Posts: 3921 Good Answers: 97	#2 Re: sensor 09/03/2011 12:52 AM
	TWA is easy - Trans Word Airlines or Twa is a Bantu word used by hunters (not really bantu) - I thought it could be translated by a 4 lettered word starting with a F. TWA & STEL are used in http://www.rkiinstruments.com/pdf/gx2001.pdf and seems to be applicable in the USA. ask them. TWA could mean sTart to Worry Alarm - __________________ Never do today what you can put of until tomorrow - Student motto
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Mikerho Guru Join Date: Jan 2007 Location: Moses Lake, WA, USA, Thulcandra - The Silent Planet (C.S. Lewis) Posts: 4216 Good Answers: 194	#3 Re: sensor 09/03/2011 1:01 AM
	...and you will never be back here to see the replies because you won't get an email when someone replies because you thought it was beneath you to register on this site...,you dork __________________ "Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone." - Ayn Rand
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Tornado Guru Join Date: May 2009 Location: Richland, WA, USA Posts: 21017 Good Answers: 795	#4 Re: sensor 09/03/2011 2:03 AM
	Both terms refer to the concentration of harmful substances. TWA = threshold weighted average (I think it pertains to allowable 8-hour exposures). STEL = short term exposure limit, for 15-minute exposures. See also OSHA and NIOSH. __________________ In vino veritas; in cervisia carmen; in aqua E. coli.
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LJMarais Participant Join Date: Sep 2011 Posts: 2	#5 Re: Sensor 09/04/2011 6:31 AM
	STEL = Short Term Exposure Level (Usually in Gas Detection) TWA = Time Weighted Average (Usually in Gas Monitoring) Hope it helps. Regards LJMarais
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dabdool (1); Hendrik (1); LJMarais (1); Mikerho (1); Tornado (1)

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