The Most Accurate Humidity Calibration Standards in the Industry

Thunder Scientific® offers the industry's best solution to your humidity calibration workload and is the world's leading manufacturer of NIST-proven, two-pressure humidity calibration systems. Thunder has manufactured a full line of humidity generators, software, and accessories for over 55 years and provides superior NVLAP accredited dew point and %RH calibration services (NVLAP Lab Code: 200582-0).

More than 1200 clients constitute a testament to insistence on quality, accuracy, and customer satisfaction. Our systems, purchased by many national standards laboratories around the world, represent the full spectrum of companies who require the tightest of tolerances for their humidity calibrations.

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We provide calibration solutions to these types of industries:
  • National Standards Laboratories
  • U.S. Military Metrology Labs & Defense Agencies
  • Industrial Manufacturing Companies
  • Energy Utilities Power
  • U. S. Government Agencies
  • Medical & Health Care Products
  • Research Laboratories
  • Agriculture, Forestry, Environmental, Weather & Oceanography Agencies
  • Aerospace Metrology Laboratories
  • Pharmaceutical Manufacturers
  • Industrial Chemical Facilities
  • Higher Education Institutions
  • Foreign Government Agencies
  • Food & Consumer Goods
  • Computer Electronics Technology

Thunder Scientific also offers calibration services for a wide range of humidity generating/measuring instruments. Thunder Scientific is 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 (0.17% * R) + 0.016 %RH.*

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.

* 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.

Thunder Scientific's NVLAP Accreditation

NVLAP Lab Logo

Thunder Scientific Corporation is pleased to announce that we currently retain renewed accreditation through the National Voluntary Laboratory Accreditation Program (NVLAP), (NVLAP Lab Code: 200582-0) which is administered by the National Institute of Standards and Technology (NIST). Thunder Scientifics’ calibration laboratory follows strict guidelines to maintain its lab code (Laboratory Code: 200582-0). Click here to view our NVLAP Scope of Accreditation or view our NVLAP Certificate of Accreditation.

Humidity Calibration Equipment

Model 2500 Humidity Generator

Benchtop/Mobile “Two-Pressure” Humidity Generator is a Self-contained humidity calibration standard that is capable of continuously supplying accurately known humidity values and can...

Model 2900 Humidity Generator

This is the newest “Two-Pressure” Humidity Generator which can produce relative humidity from 10 to 95 %RH and has an increased gas flow rate of 10 to 40 L/min which helps to improve...

Model 3920 Low Humidity Generator

The Model 3920 automated low humidity generating system is based on the fundamental, NIST proven, “two temperature” and “two pressure” principles.  This system is capable of continuously s...

Model 4PHM Four Port Heated Manifold

The Four-Port Heated Manifold Accessory comes with four 3/4″-16 straight thread adapters standard and automatically controls the temperature from ambient to 60 °C. The manifold is equipped...

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