Published as an annual by The Society Of Environmental Engineers for over 25 years, the Test House Directory is well established as the leading source of information about test houses, testing services and test equipment manufacturers. Now available in print, digital and online formats, the Directory is an easy to use reference source for test and development engineers. The 20th Edition of the Directory is now available and the mobile friendly digital edition can be viewed here. New company entries on TestHouseDirectory.com are easy to organise. For more information please contact us or fill in the interactive pdf here and send it back to us.