Primary Calibrator

Manufacturer: TSI Incorporated
Part Number: 4146
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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. These small, portable, battery-operated units are lightweight and easy to use.  Volumetric flowrate is displayed continuously, making pump adjustment, calibration and periodic flow checks fast and easy in real-time. These Primary Calibrators are temperature-compensated and pressure-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.

Flow Measurement Range

  • 0.01 to 20 lpm


  • ±2% or 0.005 std. lpm, whichever is greater


  • 5 in. × 2 in. × 1.25 in. (12.7 cm × 5 cm × 3.2 cm)

Shipping Weight

  • 2.2 lbs (1.0 kg)

Warm-up Time

  • 1 min

DC Power Input

  • 7.5 VDC ±1.5 V, 300 mA max
Specifications are subject to change without notice