| Author |
Message |
    
Brad_N
| | Posted on Tuesday, November 26, 2002 - 07:15 pm: | 
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As faithful discoweb junkie, I need help locating a manufactures of O2 sensors. I am working on some R & D for the company I work for. I need to speak with the manufacture directly. I have spent many hours searching the net, but have only found one company in the UK. My company makes leading edge biomass combustion equipment and I need to find a low cost O2 sensor for our small scale systems. A typical industrial sensor goes for $5000. We though we would give an automotive O2 sensor a try. I know this has nothing to do with Land Rovers, but there are some real smart people on this site so I thought I would give it a try.
Thanks |
John Moore (Jmoore)
| | Posted on Tuesday, November 26, 2002 - 09:06 pm: |
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I read on the Rover's North BBS that NGK is one of the largest suppliers of 02 Sensors. I searched google and found their site. I don't know if they make the original Rover sensors, but I have heard they make one that will fit.
Hope that helps,
-John |
gordon sitts (Gsitts)
| | Posted on Tuesday, November 26, 2002 - 10:16 pm: |
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The problem with insitu plat O2 sensors is for them to work they need to be heated to about 600 deg min. The exhaust supplies the heat necessary for the sensor on auto applications. They then act like a small battery producing a milivoltage = to the differential o2 level,inside to outside. For combustion analysis the system typically needs to have some sort of heater and sampling pump...Try Thermox, they have low end o2 analysis instrumentation for about $1800 last time I looked.Also don't look under O2 analyzers look under combustion analysis and control, the price will be a lot less.
hope this helps
Gordon Sitts |
Brad_N
| | Posted on Wednesday, November 27, 2002 - 01:02 am: |
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Gordon
Thanks for the lead on Thermox. WE currently use o2 insitu probe type sensors from Rosemount Analytical which are very similar. Maybe The thermox is more cost effective. Heat is not a problem since the we currenlty place the sensor in hot flue gas (350-400F)WE could place the sensor in a hotter area of the system if needed, that is no problem. The issue is an automovive o2 sensor is the millivoltage output. I need to convert and boost its output to 4-20 milli amps. I had a group in Sweden working on this but they went belly up, so now I neeed to figure it out.
Thanks
Brad |
gordon sitts (Gsitts)
| | Posted on Wednesday, November 27, 2002 - 07:52 pm: |
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The O2 sensor output conversion should be easy for JH Technologies (Harry Tritely) I think the range will be something like 10-0mv = 4-20ma, the output is inverted since = amounts of oxygen inside and outside will produce 0mv (20.9% in the stack and 20.9% outside). The above will have 4ma = 0% and 20ma = 20.9% JH Technologies can make a special mv to current converter(even with excitation if needed.
Here is Harrys Phone number...800 808 0300
Hope this helps
G |
Brad_N
| | Posted on Wednesday, November 27, 2002 - 09:42 pm: |
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G
Thanks for the info. I spoke with my supplier that I use to buy contol panel parts and electrical items from. They told me that I can buy a singal conditioner the will take the mv input and it gives me the the 4-20ma I need. That signal will then go to the PLC. I spoke with NTK a divsion of NGK. They sent me specs on one of their automotive O2 sensors and it looks promising. I will keep JH Tecnologies in mind. Where are they located? |
gordon sitts (Gsitts)
| | Posted on Wednesday, November 27, 2002 - 10:18 pm: |
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Sarasota Fla, Prices good too...
G |
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