Designed exclusively for the occupational health & safety industry, the Defender is the ultimate Primary Standard Calibrator. It allows you to calibrate your air sampling pumps within one minute and with a choice of three wide flow ranges; hands free continuous readings and downloadable results, calibration has never been easier or more convenient. SKC is world renowned for quality and durability and the Defender series is no different. Laboratory accuracy is certified by NIST through NVLAP and backed by ISO17025 accreditation and the lightweight, impact resistant design ensures that it is portable and robust. The Defender 520 model can also capture ambient temperature and pressure conditions for enhanced audit trail. Click here to download the PDF brochure