Personal sampling pumps are key tools for exposure assessment.  The accuracy of sampling depends on how much air passes through the sampling media and good laboratory analysis.  As a common practice, sampling pumps should be calibrated before and rechecked after sampling using a calibration device. TSI offers two Primary Calibrator models for calibrating pumps or any other air sampling instrument that draws an active air sample.  The Model 4146 Primary Calibrator offers a range of 0.01 to 20 lpm. These small, portable, battery-operated units are lightweight and easy to use.  Volumetric flowrate is displayed continuously so adjustments to pump flow can be made in real-time.  These Primary Calibrators are temperature-compensated and pres-sure-corrected to calculate volumetric flow rate at an accuracy within 2% of reading. Primary Calibrator kits are available complete with a soft-sided carrying case, battery pack, tubing, user guide and NIST-traceable calibration certificate.

Primary Calibrators Specifications
Flow Measurement Range .01 to 20 lpm
Accuracy ±2% or 0.005 std. lpm, whichever is greater
Dimensions 5 in. ×2 in. ×1.25 in. (12.7 cm ×5 cm ×3.2 cm)
Shipping Weight  Model 4146 2.2 lbs (1.0 kg)
Warm-up Time 1 min
DC Power Input 7.5 V DC ±1.5 V, 300 mA max