Calibration Services

Calibration services are available from Apex Instruments. Apex performs calibrations using a wet test meter and bell-prover primary standard. All console and dry gas meter calibrations are conducted in accordance with U.S. EPA standards. Apex Instruments calibrates source sampler consoles, reference dry gas meters, orifices, and pitots.

To receive a quote or more information about a Calibration, contact our Technical Sales Group (TSG) directly by phone or email.

Technical Support email: support@apexinst.com
Technical Support number: (919) 557-7300

Complete Service RMA Form

Wind Tunnel Calibrations

Wind tunnel pitot calibration services are available from Apex Instruments.

  • Method 2 and Method 5 pitot calibrations are available on-site and year-round.
  • Method 2F/2G (3D/2D) pitots are calibrated by request.
  • Method 201A (PM2.5 and PM10) pitots are calibrated on a semi-annual schedule.

All pitot wind tunnel calibrations are conducted in accordance with U.S. EPA Methods.


Dry Gas Meter Calibrations

We offer a variety of Dry Gas Meter Calibrations. Ranging from 2 to 15 points of calibration, and low to high flow rates.


Critical Orifices Calibration Services

CAL-ORF: Orifice calibration, 3-point (priced per orifice assembly)


Pitot Calibrations

PT-CAL-G: geometric of type-S pitot tube to Method 2

PT-CAL-W: wind tunnel of type-S pitot tube to Method 2


Nozzle Calibrations

US EPA Method 5 calibrations

Size and serial number engraving