----- Original Message ----
> From: Stephen A. Lawrence <sa...@pobox.com>
> To: vortex-l@eskimo.com
> Sent: Sun, January 23, 2011 10:48:48 PM
> Subject: Re: [Vo]:HP474AC probe measures Relative Humidity, not steam quality
>
>
>
> On 01/23/2011 10:32 PM, Harry Veeder wrote:
> >> Stephen A. Lawrence wrote:
> >>
> >> No, I don't think so. The stuff pumped out of the supply tank, and into
> >> the reactor, is 100% water; air comes into the supply tank at the top
> >> and displaces the water in the tank as it's pumped out.
> >>
> > Well you seem confident so I'll take your word for it.
> >
>
> That's the kind of reasoning that resulted in all those marines marching
> into a swamp full of quicksand a few years back...
>
>
Perhaps the RH sensor can't tell the difference between dry steam (superheated
water vapour) and dry air. In other words unless the steam contains some
ordinary wet vapour the RH reading should be %0.
Harry
