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#649822 - 05/07/02 04:13 PM hygrometer  
Joined: Jan 2002
Posts: 53
Alex F Offline
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Alex F  Offline
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Joined: Jan 2002
Posts: 53
Chicago
What type or brand of hygrometer do you techs recommend? I have seen several references to digital hygrometers from Radio Shack, but have also seen some techs trash these as inacurate. I did a web search and checked specs on a number of instruments. Except for the very expensive models, the accuracy is stated as plus/minus 3-4 percent. Is this accurate for piano purposes? Of course, one could purchase a sling-psychrometer and do the flailing and calculating that is required with these kinds of instruments. With my luck, I would probably wack the piano and damage the finish.

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#649823 - 05/07/02 05:34 PM Re: hygrometer  
Joined: Jan 2002
Posts: 3,290
Derick Offline
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Derick  Offline
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Joined: Jan 2002
Posts: 3,290
New York
Alex,

I believe it's more important to keep your piano at a constant humidity level than at a precise level. Therefore a 3-4% inaccuracy is not important. The hygrometer will consistently be x%inaccurate. Use it as a relative measurement of humidity not as an absolute.

Derick


Don't worry about people stealing your ideas. If your ideas are any good, you'll have to ram them down people's throats.
#649824 - 05/07/02 06:08 PM Re: hygrometer  
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SamLewisPiano.com Offline
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SamLewisPiano.com  Offline
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WHITE BLUFF (Nashville area) T...
Derick is right on. For those of you with a WalMart, I saw hygros there for $15.........Sam


Since 1975; Full-time piano tuner/tech in Nashville;
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#649825 - 05/07/02 07:02 PM Re: hygrometer  
Joined: Mar 2002
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JohnC Offline
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JohnC  Offline
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Lower Left Coast
I am not a tech. But......I have used a Radio Shack hygrometer for years. I agree that 3-4% tolerance on accuracy is not a big deal. You mainly want to know if you are getting large swings. As Derick says, you want to keep the RH as constant as possible.


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#649826 - 05/08/02 08:17 PM Re: hygrometer  
Joined: Jul 2001
Posts: 18
Christopher Fasulo Offline
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Christopher Fasulo  Offline
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Joined: Jul 2001
Posts: 18
Forest Hills, New York 11375
I just purchased an Oregon-Scientific ThermoHygrometer Model RMR136HG. It was $59.99 online. I recommend searching various online stores for one.......because the list price on this one was $89.99 and I found it on sale, with no shipping either. It is incredibly accurate, the specs don't give a + or - humidity variation. I just keep track of fluctuations. Seems to be working.

#649827 - 05/10/02 08:52 PM Re: hygrometer  
Joined: Sep 2001
Posts: 915
Chris W1 Offline
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Chris W1  Offline
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Boston
I think the accuracy is right there in the store for you to witness. At Radio Shack they all seemed to be within 2-3%, unlike the 10-30% variations I once saw on a bunch of dial gauges that were on the same rack!

Something I found usefull on the Radio Shack unit I have (I have two, one inside, one out) is that it registers highest and lowest readings between visits underneath the lid. That's a perfect report card on what the piano is going through, if you ask me.

Chris W


Amateur At Large
#649828 - 05/22/02 09:50 AM Re: hygrometer  
Joined: Apr 2002
Posts: 100
Grotius Offline
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Grotius  Offline
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Joined: Apr 2002
Posts: 100
Forgive my ignorance, but where exactly do you place a hygrometer -- alongside the piano? Underneath it? If you put it inside the piano, where exactly?

#649829 - 05/22/02 10:13 AM Re: hygrometer  
Joined: Mar 2002
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JohnC Offline
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JohnC  Offline
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Lower Left Coast
Grotius, that's a good question. It probably could make a difference in the readings you get. However, if you are looking mainly for large swings it may not be that big of an issue.

For the record mine is in the right hand corner on top of the plate near the tuning pins.


There are few joys in life greater than the absence of pain.
#649830 - 05/22/02 05:20 PM Re: hygrometer  
Joined: Jun 2001
Posts: 14,187
Jolly Offline
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Jolly  Offline
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Louisiana
Mine is a NIST certified dial type, which I believe is supposed to be accurate +/- 3%. I have it mounted on the wall, even with the case, where you don't see it unless looking for it.


www.coffee-room.com

Over 1.3M (and counting) posts where pianists discuss everything. And nothing.
#649831 - 05/23/02 11:23 AM Re: hygrometer  
Joined: Sep 2001
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Chris W1 Offline
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Chris W1  Offline
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Joined: Sep 2001
Posts: 915
Boston
Mine is in a vertical near a place where the felt curtain pivots from. I don't know where I'd put one in a grand. They are harder to create a microclimate within than are verticals.

I liked one of the previous threads on the Venta Air-washer and think that would be the way I'd go when the time to get a grand arrives. The house we are closing on 6/14 has forced hot air, which I'm going to try and start a thread about.

Chris W


Amateur At Large
#649832 - 05/23/02 11:59 AM Re: hygrometer  
Joined: Nov 2001
Posts: 1,820
SteveY Offline
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SteveY  Offline
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Joined: Nov 2001
Posts: 1,820
NJ
Last time I visited Faust Harrison in NYC, they had a really cool hygrometer sitting on the desk in the front room. It had an analog guage. It was very nice looking (probably expensive), but good enough for my wife to approve of it being "seen" in our living room. However, I no idea what kind it is or where they got it.

I opted for the Radio Shack unit.


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