Mailing List Archive

Mailing List: techdiver

Message Display

Date: Wed, 27 Sep 1995 15:04:41 +0100
To: "William E. Sadler" <yqwyktp@bl*.bs*.co*>,
From: m87stme@mt*.ch*.se* (Sten Meyer)
Subject: Re: Oxygen Analyzers
Cc: techdiver@terra.net (Techdiver Mail List),

At 09.19 95-09-27, William E. Sadler wrote:
>The only meter that I've seen that works are the paramagnetic type.  They
>measure the O2 via its magnetic properties.  Yes, Oxygen has magnetic
>properties, as it is a metal.  Which I guess I could have deduced, but didn't.

>Anyway, paramagnetic sensors cost about $1500 just for the sensor, at wholesale
>(OEM) prices.  Complete instruments cost about 4k.  But they are linear over
>the range 0-100% O2, there is no hysterisis, and very good repeatability.

The Datex analysers costs ca 7.5 K USD for a ready to run unit. This is a
breathing gas analyser with O2 CO2 and N2O. It is equiped with a pump and a
computer to make it "doctor safe". It is fast enough to measure breath by
breath, has analog and digital outputs, has automatic calibraion with room
air.

You must remember that the paramagnetic sensor is very sensitive to
vibration so it is no soluiton for rebreathers.

Navigate by Author: [Previous] [Next] [Author Search Index]
Navigate by Subject: [Previous] [Next] [Subject Search Index]

[Send Reply] [Send Message with New Topic]

[Search Selection] [Mailing List Home] [Home]