Gas solid-liquid samplers need a Calibration Kit. Air flow calibrators revolutionize high-grade air flow calibration. Designed to replace the error-prone, inflexible, large volume piston transducer with the digital mass flow standard, which is compact, easy to use, versatile, the standard of choice for Premium calibration laboratories and mass flow instrument manufacturers worldwide. Combining a reference flow monitor with a laminar flow sampler, the gas flow calibrator provides true mass flow calibration and traceability without volume-to-volume conversion. mass. Kits contain everything needed although the modular design allows for simple upgrades and expansions.