BGI tetracal- Flow Audit Devise
BGI - DeltaCal and TetraCal volumetric flow calibration/audit devices give direct readings of volumetric flow rate, barometric pressure, ambient temperature and filter temperature in one instrument. With an accessory adaptor the TetraCal is usable with any air sampler in the 0.1-30LPM range. Utilizing a venturi orifice, the units meet USEPA requirements for calibration and audits of PM10 and PM2.5 samplers.
BIOS - Bios is a recognized world leader in primary gas flow measurement. The Defender and Definer Flow Calibrators all utilise proven Drycal technology. Bios’s versatile products are ideal for use in occupational health and safety, environmental protection, industrial process control, R&D and calibration laboratories.
BIOS Defender Flow Calibrator.
The Defender™ Series of volumetric primary standards are designed for use by professionals in the occupational health and safety industry.
The Definer 220 volumetric and standardized primary flow meter is designed for use by environmental compliance and process measurement communities.
The Definer 1020 is BIOS’s first high flow primary piston prover.
BIOS Defender 510 & 520 Brochure
BIOS Definer 220 Brochure
BIOS Definer 1020 Brochure
Bios Met Lab®- ML 800 Series
The Bios Met Lab® Series of high-precision 
primary piston provers offers exceptional low uncertainties to meet the most stringent laboratory and industrial process control requirements. The convenient Met Lab line offers Two products to enable you to meet your highest accuracy demands: ML-800 with the flow range of 0.5 to 50,000 scc per minute and the ML-500 with the range of 5 to 50,000 scc per minute
BIOS ML 500 & 800 Brochure
BIOS ML 800-3 Cell Spec Sheet
LN Industries - Portable gas calibrator with GPT and internal zero air generator is ideal for calibrating and verifying linearization of air pollution monitors. The precision, stability and reproducibility of the generated mixtures are due to the joint use of critical orifices and the high stability of mechanical pressure regulators. Internal self re-generable zero air generators avoid the use of expensive and cumbersome air cylinders.
Teledyne Advanced Pollution Instrumentation - Mass Flow Calibrators and Zero air supplies for easy, precise calibration of your gas analysers.
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