Foster Instruments specializes in the sales, calibration, service and support of occupational health screening instruments designed to ensure the accuracy and reliability of your employee health program. These instruments include audiometers, audiometric booths, breath alcohol testers, fit testers (earplug and respirator), spirometers, aeds and ecgs. We offer several breath alcohol technician and CAOHC certification classes each year. Foster OnSite, our mobile onsite hearing testing service, can save your company the risk and expense of sending employees off-site to an occupational health testing facility.