Made Here - Used Everywhere

Decagon designs, manufactures, and markets scientific instruments, specializing in soil moisture sensors and equipment. The applied research division focuses on measuring water, light, and heat in the soil-plant-atmosphere continuum. Our instruments are used throughout the world in universities, research and testing laboratories, government agencies, vineyards, farms, and industrial applications.


Still Researching

Decagon was founded in 1983 by Dr. Gaylon Campbell, a renowned soil scientist at Washington State University. Dr. Campbell was (and is) an old-school physicist. When he wanted to measure something, he built an instrument to measure it. Other people wanted his creations, and eventually he couldn't keep up with the demand. Decagon was formed to build and sell his instruments.

More than 25 years later, Decagon is a thriving company where research scientists still work to build what they and their colleagues need to do good research.

Our goal: to get the data you need into your hands in the most efficient and accurate way possible.


Interesting Decagon Facts:

  • Decagon built a thermal and electrical conductivity probe for NASA's Phoenix Scout Lander mission to Mars. The probe successfully gathered thermal and electrical properties data in addition to measuring atmospheric humidity and wind speed.
  • Decagon is collaborating with horticultural researchers at the University of Maryland and the University of Georgia (among other places) on a 5 year, $5.2 million USDA grant to increase the efficiency of water and nutrient use by ornamental growers.
  • Decagon also makes instruments for the food industry. 80% of the top 100 food companies use Decagon's AquaLab to check water activity in their products. (Visit our food and pharmaceutical testing division at
  • Decagon scientists conduct ongoing research both in an on-site soils lab and at several agricultural research sites. They collaborate with outside scientists on research projects and teach the Introduction to Environmental Biophysics course at Washington State University.
  • Decagon is located in Pullman, Washington, home of Washington State University.


Quality Management at Decagon

In order to provide timely feedback to the high volume of vendor surveys and evaluation requests Decagon Devices, Inc. receives, Decagon has created a Quality Survey Response for our customers.  We have designed this response to fit the majority of the questions we are asked in regards to our Quality Management System,
ISO 9001:2008 registration, and calibration services. Read more about quality management at Decagon.