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Article #7125Re: Humidity Sensor Needed (Cheap!!!)
From: Ian Hawkins
Date: Thu, 03 Sep 1992 21:18
Date: Thu, 03 Sep 1992 21:18
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two humidity sensors available are :
1) Nemoto NPH-50A, resistive ( a ceramic)
2) Philips H1 , capacitive (a foil coated film, data sheet 2322 691 90001)
By accuracy I presume you mean long term adherance to the
original humidity/electrical paramater characteristic combined
with a low (very low) temperature co efficient ?. Neither sensor
is within 1% for some tests, ie hysterisis during 10-90%
humidity scanning. The nemoto is best for hysterisis (3%) and
the philips best for temp. coef. (0.1%/deg.C ) . Overall the
Philips looks by far the easiest sensor to work with. The
nemoto will not work with a DC bias. This is all from spec
sheets, I havent yet used either sensor.
Ian Hawkins
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Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!uknet!mucs!nessie!idh From: idh@nessie.mcc.ac.uk (Ian Hawkins) Newsgroups: sci.electronics Subject: Re: Humidity Sensor Needed (Cheap!!!) Message-ID: <1992Sep3.211859.1660@nessie.mcc.ac.uk> Date: 3 Sep 92 21:18:59 GMT Organization: Manchester Computing Centre Lines: 14