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40 lines
1.2 KiB
40 lines
1.2 KiB
there are o2 sensors
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o2-a1
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o2-a2
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o2-a3
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first sensor type is a two pin model. this outputs a uA current.
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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
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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
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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
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(alphasense, and citicel) only supply to OEM. The OEM doesn't easily supply replacements (i.e. honeywell).
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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.
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people will go to china every time.
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because there is no official distributor that resells the products, consumers get shafted.
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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).
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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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