HumiCalc with Uncertainty software, calculates complex humidity uncertainties with ease.

Thunder Scientific^® offers the industry's best solution to your humidity calibration workload. The world's leading manufacturer of NIST-proven, two-pressure humidity calibration systems, Thunder has offered a full line of humidity generation equipment, software, and accessories for 55 years now.

More than 1200 clients constitute a testament to insistence on quality, accuracy, and customer satisfaction. Our systems are purchased by many national standards laboratories around the world and our clients represent the full spectrum of companies with close tolerance humidity calibration needs like yours.

• National standards labs, including Sandia National Laboratories and the National Weather Service

• Aerospace metrology labs operated by companies like Boeing, Lockheed Martin, Northrop Grumman, Raytheon and United Launch Alliance (ULA)

• U.S. Military Metrology Labs for the Army, Navy and Air Force PMEL

• Pharmaceutical manufacturers, including Abbott Laboratories, Merck, Lilly, Pfizer and Johnson & Johnson

• Industrial manufacturing companies such as Johnson Controls, GE Companies, Honeywell, Intel, Vaisala, and Fluke Instruments just to name a few

Thunder Scientific also offers calibration services for a wide range of humidity instruments. We are currently the only NVLAP accredited source to offer humidity calibrations that are traceable to the International System of Units (SI) through a national metrology institute (NIST) recognized through a CIPM MRA with uncertainties at 0.31 %RH of reading*.

We constantly research and improve our humidity systems to meet the changing requirements of industry. Sign up for our email newsletter, Thunder Struck, to stay up-to-date with our latest product innovations.

🏆Congratulations, to our Calibration Laboratory for having two ASQ Certified Calibration Technicians on staff.

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* Represents an expanded uncertainty using a coverage factor, k=2, at an approximate level of confidence of 95%. Uncertainty for relative humidity is not specified below 0 °C.