Bios DryCal portable gas flow calibrator.  Primary standard, provides volumetric and standardized flow readings.  Flow range 5 to 30,000 sccm with an accuracy of +/- 0.75% of reading volumetric.

The Bios Defender Series are dry and portable volumetric primary flow standards.  The design is compact, light and very easy to use.  The Defender provides fast volumetric readings with an accuracy of +/- 1% of reading, and is capable of taking measurements under suction or positive pressure.  The flow capacity ranges from 5 sccm up to 30,000 sccm.  The Defender was engineered for the occupational health and safety industry where accurate measurement is a must.

The Bios Definer 110 is a compact indestructible EPA Flow Transfer Standard.   The Definer 110 is compatible with most ambient airflow monitors.

Bios Met Lab Series high-precision primary standard piston prover.   The ML-500 is a completely dry portable calibrator with a high accuracy of +/- 0.20% of reading volumetric.  There are three interchangeable cells with a capacity of 5 to 50,000 sccm.   The ML-500 measures fluid temperature and pressure allowing it to provide both volumetric and standardized flow readings.

Bios Met Lab Series high-precision primary standard piston prover.   The ML-800 has a high accuracy of +/- 0.15% of reading standardized.  There are four interchangeable flow cells that cover a range of 0.5 to 50,000 sccm.  The ML-800 measures fluid temperature and pressure and provides flow readings in volumetric or standardized.

The ML-800-3 is a low flow cell that has recently been introduced for the ML-800 primary standard calibrator family.  This new cell provides a flow range of 0.5 to 50 sccm, with an accuracy of +/- 0.25% of reading standardized.