[Hai-users] Temperature & Humidity sensor

[Paul | CSI]

What I am trying to accomplish is a more accurate way to anticipate
temperature changes. The very nature of a Thermostat is to be reactive to
ambient temperature but it doesn't take into account infiltration. In Canada
we need to "bump" the thermostat a degree when it gets excessively cold
(similarly with the a/c in summer). It's common to see a 100°F temperature
swing between Summer and Winter - and that doesn't take the humidity into
account. I'm just looking for some ideas and what others are doing to make
the living space both comfortable and energy efficient at the same time (I
know it is a contradiction).

Paul

-----Original Message-----
From: Dan Barclay [mailto:Dan at BarclaySoftware.com] 
Sent: November 1, 2005 3:28 PM
To: satz at iranger.com; 'Paul Whyte'
Cc: 'HAI Users'
Subject: RE: [Hai-users] Temperature & Humidity sensor

I'm not sure exactly what you're trying to detect, but if you're looking for
an indication to use for lawn watering you should have a look at the sensors
used by irrigation equipment.  The ones I've seen are simple and reliable,
using the swelling of leather washers to trip a switch.  Most lawn
irrigation companies should have them available.  The indication isn't
immediate, nor does it clear immediately.  It's actually intended to mimic
the lawn.

An indication of "is it raining rat now!" would be to use a moisture sensor
on a sloped surface, or perhaps level in a vessel having a slow drain (being
filled from a roof valley).

Of course, how you do this would depend on what you want to do with the
information.

Dan

> -----Original Message-----
> From: hai-users-bounces at tssi.com [mailto:hai-users-bounces at tssi.com] 
> On Behalf Of satz at iranger.com
> Sent: Tuesday, November 01, 2005 1:13 PM
> To: Paul Whyte
> Cc: HAI Users
> Subject: Re: [Hai-users] Temperature & Humidity sensor
> 
> You might be able to find a rain gauge that will give you a contact 
> closure. I don't know of any. Alternatively you would need external 
> access to a web site or a weather station that could provide that
information.
> 
> I am not sure why rain or snow would be an issue. You want to know 
> when it is higher regardless of the reason unless I am missing something.
> 
> Thanks,
> Greg
> 
> > Here's a question for the dedicated programmers out there.
> >
> > I would like to incorporate some temperature code into a Pro2 that 
> > takes outdoor temperature and humidity into account. The problem 
> > with humidity is how to discern when it's raining or snowing (this 
> > would throw the
> humidity
> > values out of normal) - hence why it might be a good idea to just 
> > stick with temperature only. Any ideas or thoughts?
> 
> 
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