Personal Air Sampling Pump Calibrator
To  calibrate the air sampling pumps

Backed by Proven Bios DryCal® Technology for fast, accurate calibrations of personal sampling pumps, the Defender is a primary volumetric gas flow calibration standard with the ability to compensate for both temperature & pressure readings giving you the flexibility to do as much as you need while you work to defend lives.

For use with non-corrosive, non-condensing, non-combustible gases, less than 70% humidity.

Flow Range: 5 – 30,000 ccm
-- Accuracy Volumetric: +/- 1% of reading
-- Accuracy Standardized: +/- 1.2% of reading (Model 530 only)
-- Three Flow Ranges Available for Each Defender Model

3 Models, 3 Flow standards
--Defender 510 Volumetric Primary Flow Standard
--Defender 520 Enhanced Volumetric Primary Flow Standard--Document Temperature & Pressure for Enhanced Audit Trail
--Defender 530 Standardized and Volumetric Primary Flow Standard--Documents and Calibrates Using Temperature & Pressure