The SOLAIR 3100 is the most versatile particle counter on the market today. Whether you're certifying your cleanroom to ISO standards, performing routine testing, counting particles in your compressed gas lines, scanning your HEPA filters for leaks, challenge testing your HEPA filters or measuring environmental parameters such as TRH, DP, or AV, the SOLAIR 3100 portable particle counter is the right instrument to get the job done.