Method of determining measured gas data with remote sensors

A method of computing actual gas concentration in a system with remote gas sensors comprising the steps of:

• storing precomputed coefficients of a gas calibration polynomial at a remote gas sensor;
• transmitting said coefficients to a central location;
• sensing a target gas with said remote gas sensor to produce an output value;
• transmitting said output value to said central location;
• comparing said output value against a threshold;
• forming an average from said output value and previously reported output values when said output value is less than said threshold;
• using said average to compute an estimated zero point;
• subtracting said estimated zero point from a known zero point to form an estimated correction;
• adding said estimated correction to said output value to form a modified output value;
• solving a polynomial equation from said coefficients and said modified output value to determine a gas concentration value.

An apparatus for computing actual gas concentration of a target gas in a system with remote gas sensors comprising:

• at least one gas sensor at a remote location with an output
• value that changes according to gas concentration;
• a polynomial stored at said remote location representing a gas response of said remote gas sensor;
• a means for transmitting said polynomial to a central location;
• a means at said remote location for measuring said gas sensor output value;
• a means for transmitting said gas sensor output value to said central location;
• a means at said central location for evaluating said polynomial using said gas sensor output value to determine gas concentration.