Bios provides leading flow calibration devices used for effective, defensible workplace safety, environmental monitory, process management and calibration laboratory performance. Flow professionals trust Bios products for their exceptional accuracy, reliability and ease of operations, as well as a full range of accessories and the recalibration and maintenance services that keep our Defender, Definer and ML products operating at peak efficiency for years to come. With proven DryCal® technology, each Bios product is a true primary standard, backed by full compliance with rigorous government and industry standards, offering better defensibility for the flow data.

Bios Catalogs

TheDefender™ Series is the calibrator of choice for environmental and workplace safety professionals. The true primary standard known for its ruggedness, dependability and ease of operation. The 510 and 520 both offers 1% volumetric accuracy, and three flow ranges meeting a full range of flow-rate needs: LOW (5-500 mL/min); MEDIUM (50-5,000 mL/min; and HIGH (300-30,000 ml/min). But the 520 simultaneously records temperature and pressure conditions in the calibration process. Comes with Bios Optimizer software for easy data collection.
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The Bios Definer 220 is a primary flow meter offering accuracy of 1% standardized and 0.75% volumetric, with a host of options for personal customization. Take measurements one at a time, or automate the process with hands-free Continuous and Burst modes. Set your own averaging function, from 1 to 100 measurements. Time profile gas flows with measurement intervals from 1-60 minutes. Choose your own display settings and style, and the measurement units right for you. Weighs only 29 ounces, with three flow ranges: LOW (5-500 mL/min); MEDIUM (50-5,000 mL/min; and HIGH (300-30,000 ml/min). Winner of the Flow Control Design Award.
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The Bios Definer 110 is a compact indestructible EPA Flow Transfer Standard. The Definer 110 is small and lightweight , making it at home in the field, where rough handling is the norm. It is a direct replacement to fragile, glass-style orifice calibrators. The compact, durable orifice is designed to fit directly on an air sampler with a standard 1.25 inches OD inlet tube and the pressure drop across the orifice is measured with a digital manometer. Available in two flow ranges, the Definer 110 features an uncertainty of just 1% of flow reading within its rated flow range.
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