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- Path: 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
-
- 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
-