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- there are o2 sensors
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- o2-a1
- o2-a2
- o2-a3
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- first sensor type is a two pin model. this outputs a uA current.
- there is a 2nd type (same o2 sensor above) but three pins.
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- my guess is that 1 and 3 are power pins, 2 is signal
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- two pin model is replacable on dkey with sgx-40x
- uA current is near identical
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- three pin model is replacable with ec410 though that is $30 more.
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- Save $30 by hacking the three pin board (which is near identical) to be
- the two pin model.
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- Making a foshw vers of these boards is trivial
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- There is a problem with electrochemical gas sensors. some of the main brands
- (alphasense, and citicel) only supply to OEM. The OEM doesn't easily supply replacements (i.e. honeywell).
- i will have to search some more.
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- in any case, this is left to the consumer to either gamble on a $150 seller in IL, or buy the $40 china option.
- people will go to china every time.
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- because there is no official distributor that resells the products, consumers get shafted.
- this is a shitty move by the companies.
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- there are some options on dkey, but may not be 1:1 compatible (depends on the sensor).
- more testing on output needed
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- why can't we just have official distributors instead of dealing with the OEM nonsense. mafia system.
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