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  Home » Catalog » Pumps/Calibrators/Accessories » Calibrators and Accessories » chek-mate Calibrator

chek-mate Calibrator

Orderable Items The Proof is in the Performance! With a volumetric accuracy of 1% and a price $500 less than a Defender, the chek-mate is the smart choice for air sample pump calibration! Now available with CalChek capability for direct communication to CalChek-ready pumps for automatic calibration!

New Calchek Model burst
  • Two models to cover a range of flows
    • Medium Flow: 0.50 to 5 L/min
    • Low Flow: 20 to 500 ml/min

  • CalChek capability in medium flow model provides direct communication to CalChek-ready pumps for automatic calibration *

  • Certified volumetric accuracy is 1% of reading for ranges of 750 to 5000 ml/min (medium flow) and 50 to 500 ml/min (low flow)
    • 2.5% accuracy outside of above ranges

  • Built-in sensors adjust for changes in temperature and atmospheric pressure

  • Certified to a NIST or UKAS national standard in an ISO 17025 calibration laboratory
    • NIST or UKAS-traceable calibration certificate supplied

  • Moving-average flow reading updates and displays continuously

  • Sleek design is field portable for calibration anywhere, anytime
    • 7.1 x 3.3 x 1.3 inches (18 x 8.3 x 3.3cm)
    • Only 8.5 ounces (242 grams)
    • Compact for handheld use

  • 9-volt alkaline battery operation
    • Auto shut-off feature conserves battery

  • No moving parts, use in any orientation

  • Easy one-button operation

  • Internal filter protects components from dust

* chek-mate Cat. No. 375-0550N has a CalChek serial interface for use with CalChek Communication Cable Cat. No. 375-200








Performance Profile

Flow Measurement Range

Low Flow Chek-mate:
20 to 500 ml/min (volumetric)

Medium Flow Chek-mate:
500 to 5000 ml/min (volumetric)

Display Resolution 0.001 L/min
Accuracy Low Flow Chek-mate:
20-50 ml/min ± 2.5% of reading
50-500 ml/min ± 1% of reading

Medium Flow Chek-mate:
500-750 ml/min ± 2.5% of reading
750 to 5000 ml/min ± 1% of reading


9-V alkaline primary (disposable) PP3 / 6LR61 / 1604A or equivalent, or
8.4V NiMH secondary (rechargeable) PP3 / 6HR61 / 8.4H5 or equivalent

Automatic power off timer – 15 minutes

Operating Temperature Range 32 to 104 F (0 to 40 C)

Operating Barometric Pressure

700 mbar to 1090 mbar (20.7 inch Hg to 32.2 inch Hg)

Operating Altitude

Sea level to approximately 10,000 ft (3050 m) above sea level

IP Rating (enclosure)


Overall Dimensions
(including hose tail)

7 x 3.3 x 1.3 in (17.8 x 8.4 x 3.3 cm)


8.3 ounces (236 gm)


CE Marked








Chek Mate Sample Train

How chek-mate Works
The SKC chek-mate calibrator is a highly reliable orifice-type airflow meter that incorporates sensors to measure pressure drop across a fixed orifice. Sensors automatically correct for changes in air temperature and atmospheric pressure to provide accurate volumetric flow rate readings. Volumetric accuracy is 1% of reading and highly repeatable.