The particle counter is a critical piece of equipment for monitoring a cleanroom environment. Routine maintenance and proper calibration will guarantee that your unit operates properly and gives you accurate readings. Air Water Earth provides on-site and lab calibration services for most major brand particle counters. All calibrations are done according to the primary method in ASTM F328-98 and JIS B 9921. All instrumentation is traceable to NIST. With each calibration we provide a certificate of calibration and report. Reports include both quality-checked final results as well as as-found data.