On Wed, 14 Feb 1996, ERIN E. GAMSE wrote:
> I am trying to purchase a recording hygrothermograph for monitoring
> in a newly restored 1904 building. Does anyone have any strong
> recommendations for brands and/or suppliers. Is Belfort in Baltimore
> still in favor? Any tips or things to watch out for?
>=20
Tips:
Purchase a hair bundle unit if you have few problems with particulate=20
contamination, otherwise, if it is very dusty in the space you will be=20
monitoring, use a unit which has polymer bundle. I have mey favorite=20
suppliers/products-they are listed below.
Also-don't forget, you will need a psychrometer to calibrate the=20
recording devise! (You should calibrate OFTEN) (and be sure to change=20
the wick in the psycrometer OFTEN)
anyway, here are my favorite:
January, 1996
Best Prices from suppliers of equipment for monitoring temperature and=20
relative humidity:
Scientific Sales, Inc.
P.O. Box 6725
Lawrenceville, NJ 08648
1-800-788-5666
Hygrothermograph=20
Model 5020-A : hygrothermograph with 26-hour/176-hour/31 day battery=20
powered clock and one packet of Model 50202 charts. Price includes shippin=
g
$625.00
Cole-Parmer Instrument Company=20
625 E. Bunker Court
Vernon Hills, Illinois 60061
1-800-323-4340
Psychrometer
Catalogue description: Measures relative humidity without agitation-built=
=20
in miniature fan cools wet bulb automatically. (Fan is powered by three=20
D batteries). To operate, first allow 1 1/2 -2 minutes response time. =20
Then turn on device for 1 1/2-2 minutes. Use the included slide rule and=
=20
tables to calculate RH. A chart on the instrument case also lets you=20
determine dew point.
Choose a =A1F pshychrometer. It includes one 2-oz. water bottle;=20
psychrometric slide rule, tables, and chart; extra wicking material;=20
instruction manual and carrying case. Spare, alcohol-filled=20
thermometers are available.
H-03312-20 Psychrometer, =A1F
this will require 3-D batteries
$135.00
H-09376-03 Batteries, 1.5 VD
(pack of 4)
$6.25
Lori van Handel
Director of Field Services
Williamstown Art Conservation Center
225 South Street
Williamstown, MA 01267
413-458-5741
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