Product # APB-708500 – The BUCK Bio-Culture(tm) Pump operates with an impeller type blower with very little backpressure resistance. This provides high flows and quiet operation. Traditional calibration devices have restricted openings which slow the pump speed. This specially designed Calibration Head fits on the BUCK Bio-Culture(tm) Pump replacing the sampling head to allow the flow selection by the user between 30 and 120 LPM. This flow should be calibrated with a blank agar plate installed. This Calibration is provided with a Certificate of Calibration which was performed with a NIST traceable Venturi Calibrator with a 1% accuracy.