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What companies make a portable gas detector for caving a.k.a. Spelunking?

Jun 26, 2008 by dust112387 | Posted in Other - Environment

I sine qua non a list of companies and if anyone has suggestions that be great too.
I am using this manoeuvre in abandon mining shafts in colorado so it needs to be a multi-gas detector.

DRAGER based in Pittsburgh about $800 for a full spectrum plastic canary.

What toxic gas in sewage drainage? portable gas detector that can used to enter sewage drainage?

Apr 12, 2006 by dragonemas | Posted in Quotations

hydrogen sulfide, carbon monoxide, and carbon dioxide. Bonus, you have to be concerned that there might be no oxygen in the air.

Entering a sewer should be socialistic for people trained in doing "confined rank" entries.

Is there a way to seal these tiny gas leaks from the exterior of the steel pipes?

Aug 20, 2007 by binary b | Posted in Do It Yourself (DIY)

I remodelled a tellingly and am in contract to sell it. The home inspector found gas leaks with a portable gas detector AFTER the gas enterprise and furnace installer NEITHER found any leaks with soapy drinking-water. So we are assuming these are tiny minute leaks, if leaks at all. Is there a way to seal these locations from the surface of the steel pipes? A sealant or expoxy which might suit to seal such small leaks? I still do not get any soap bubbles from two of the three locations and honest one small tiny bubble at the third,which doesnt even puncture.

The stew is that the electronic sniffers will read up to 50ppm which will not show up on a bubble. the only way to fix it is to have a licenced technician to disassemble and re-dope the fittings and relinquish a work-order stating all leaks were checked and repaired .