We are looking freelancer who designed device for measuring gas concentration in very low level gases in outdoor environment.
We need measurement limit from 1 ppb. Resolution 0.5 and better (0.1) ppb. We will calibrate ourself (by temperature vs concetration), if all will working.
We prefer AD5941 (for 4 sensors) or LMP91000 or better chips with better accuracy, you can recommned to us. Gas sensors will use 110-407, 110-406 and MIC6814. Or you can recoment us your sensors, with better useablity for this purpose.
We expect schematic. Then we will make test board by us.
This HW will connect to PC with remote access for test your SW. We need to use MPLAB + XC8
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