Re: Gas detector advice/info welcome
« Reply #4 on: May 20, 2013, 10:37:29 am »
My club (Crewe CPC) uses pair of IndSci oxygen meters (single gas units) for testing the atmosphere in caves and mines. One is a disposable unit Gasbadge Plus which you can buy for less than £100, and lasts until the battery runs out (about two years). The other Gasbadge Pro, which comes with a lifetime warranty for everything but the sensors, and comes in at just uner £250 - replacement sensors cost just over £100.
As these are both oxygen meters, they can be calibrated using fresh air, but be warned - as they are only measuring oxygen, there is always the danger that the displacement gas may be something other than carbon dioxide, although all the instances in the Peak which I have investigated so far (using a CO2 meter) have been caused by CO2 build up.
Needless to say, the advice from IndSci is to calibrate using their kit and a sample canister of oxygen, they also recommend bump testing prior to each use.
Hope this helps. If you do decide to use a meter in the caves and mines of the Peak, I am building a database of information which may help us to understand the occasional problems which we get in this area with CO2 intrusions, and I would be grateful of any figures which you could supply - preferably date, time, cave/mine name, passage/area of cave/mine sampled, type of meter used, weather conditions, cave/surface temperature, and any other relevant data.
Obviously you may not wish to record everything in such great detail, but I am happy to receive whatever you send. Please email data to gasman at TheDCA dot org dot uk.
Cheers
Al
------
HMM HMM, jen aby to nebylo jak s tema testama PMx, ktery se daj koupit na Aliexpresu... kdyz uz to neco meri, tak jsi mrtvej... vicemene proto to nechci googlit, ale chtel bych nejake zkusenosti lidi, kterym se uz nejaky cas dari neumrit treba v kobkach pod Brnem, kde to bude smrdet asi dost zasadne.
Dnes mi kamarad [kterej prave zjistil, ze svitim... resp. svitil jsem pred dekontaminaci ranni sprchou] rikal o nejakejch typkach, co lezli pro geoCache do kanalu v dobe privalovych destu... mozna jsem moc opatrnej, kazdopadne nechi vyhrat darwinovu cenu, a ten typek me dnes DOST prekvapil, stejne jako 10h zvracejici "spolulezec" pred par tydny...
Gas detector advice/info welcome - Idle Chat - UK Caving
https://ukcaving.com/board/index.php?topic=15212.0