GASTEC Airtec/Drager Detector tubes

Gibbon · 20th August 2007, 13:37

Are they all 100ml per minute? Does anyone have a more information than is show on
Instrument Depot: GASTEC Gas Detection Tube System

Also can anyone recommend a supplier in the UK?

whoizrob · 20th August 2007, 18:25

These are one use items which require a handheld pump to withdraw a certain volume of gas into the tube. Volume required varies on chemical sampled from 1 stroke of the pump to sometimes as high as 50 strokes. The depth of the reaction front gives you an estimate of the amount of chemical present. Once sample is taken and introduced into the tube the tubes are spent and must be replaced for a second reading. if you plan on using the tubes to detect "bad" stuff in a one time sample mix, you are fine, but you can't use these for monitoring a gas supply.

HTH,

Rob

swampdiver · 22nd August 2007, 03:04

I'd stick with the Drager tubes especially if you think you will be wanting to do moisture levels. I have used the Gastec moisture tubes which have poor precision and accuracy. The Drager tubes may take longer to run and are slightly more expensive but reliability is greater. You can get the tubes from Divex.
Welcome to DIVEX - World Leaders in Diving Equipment Technology

I think Factair also sells them. Look under Online purchasing.
Factair Limited - Confined Space Ventilation equipment, Breathing air compressors, Mobile air compressors

The flow rates depend on which tube you are using. If you get the Drager or Gastec catalogue it has all the flow rates for each tube.

20th August 2007, 13:37	#1 (permalink)
Gibbon Southern Monkey Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Aug 2005 Location: East Devon Posts: 226	GASTEC Airtec/Drager Detector tubes Are they all 100ml per minute? Does anyone have a more information than is show on Instrument Depot: GASTEC Gas Detection Tube System Also can anyone recommend a supplier in the UK?
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20th August 2007, 18:25	#2 (permalink)
whoizrob New Member Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Apr 2006 Location: Sacramento Posts: 72	What are you planning on using these for? These are one use items which require a handheld pump to withdraw a certain volume of gas into the tube. Volume required varies on chemical sampled from 1 stroke of the pump to sometimes as high as 50 strokes. The depth of the reaction front gives you an estimate of the amount of chemical present. Once sample is taken and introduced into the tube the tubes are spent and must be replaced for a second reading. if you plan on using the tubes to detect "bad" stuff in a one time sample mix, you are fine, but you can't use these for monitoring a gas supply. HTH, Rob
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22nd August 2007, 03:04	#3 (permalink)
swampdiver New Member Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: May 2006 Location: Toronto, Canada Posts: 12	Re: GASTEC Airtec/Drager Detector tubes I'd stick with the Drager tubes especially if you think you will be wanting to do moisture levels. I have used the Gastec moisture tubes which have poor precision and accuracy. The Drager tubes may take longer to run and are slightly more expensive but reliability is greater. You can get the tubes from Divex. Welcome to DIVEX - World Leaders in Diving Equipment Technology I think Factair also sells them. Look under Online purchasing. Factair Limited - Confined Space Ventilation equipment, Breathing air compressors, Mobile air compressors The flow rates depend on which tube you are using. If you get the Drager or Gastec catalogue it has all the flow rates for each tube.
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