WB O2 Circuit Impedance

[bcroe at juno.com]

The list design has a 1000 ohm resistor in the Vout lead,
mostly to protect the internal circuit from outside stuff.  Thats
way lower than a NB OX sensor direct.  R15 could be 
lowered to perhaps 100 ohms or even zero if your 
logger needed that.  

Bruce Roe

On Tue, 16 Oct 2001 17:56:51 -0400 Brian Renegar
<thomas.renegar at nist.gov> writes:
> >BTW--I like the Dataq module solution. It's 4 channel A/D 
> >should cover reading of the WB plus 3 other data points.
> 
> It is NOT a high impedance device though.  I have verified 
> this with the company.  Anyone know what kind of impedance 
> is required for the wideband O2 output?  When data logging 
> my stock NB O2 sensors without an op-amp isolation circuit, 
> they go haywire.
> 
> Brian
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