NORMAN — The Oklahoma Mesonet is more than a collection of weather gadgets spread throughout the state. Thanks to Fred Brock and others, it has grown into a 120-station system of 4,000 climate sensors that measure data with pinpoint accuracy.

The testing and calibration for every sensor happens at the Mesonet’s standards lab, which Brock established in 1992. The lab, now housed at the National Weathe...