Bradley Padden
Managing Director
Bios introduces drop-in replacement for performing ambient monitor flow calibrations using an orifice type flow transfer standard.
The Bios Definer™ 110 allows you to utilize the built in firmware for performing field flow audits for many Thermo® samplers and monitors including the Partisol® 2000, 2000-FRM, 2000-Audit, 2025, Dichotomous-2025 Samplers, and TEOM® Series 1400a, Series 8400N and 8400S monitors.
The Definer 110 (pictured above) is the latest application-specific product from Bios, delivering the ambient monitoring community an alternative to the fragile, glass-style orifice calibrators commonly used in performing audits of PM2.5, PM10 and TEOM air samplers.
Available in two flow ranges, the new Definer 110 features an unbreakable precision orifice manufactured with a zero coefficient expansion alloy – which means it can be used at any temperature and in any environment without affecting its accuracy. The Definer 110 is housed in an extremely durable, high-impact plastic body, complete with an integrated wind screen to reduce wind and eddy effects and enable it to be confidently used even in the most adverse field conditions. It’s also small and lightweight, so it’s easy to grab and go making it at home in field, where rough handling is the norm. And, because it features Viton® seals throughout, your Definer 110 won’t degrade over time and exposure to common airborne pollutants.
Best of all, the Definer 110 is designed to be calibrated by the Bios Met Lab Series of high-precision primary standards. Each orifice is individually-calibrated at seven set points across its broad range, for the highest accuracy m and b constants.
As with all Bios products, Definer 110 calibrations are performed in our NVLAP-accredited ISO 17025, ANSI Z-540, NIST Handbook 150 gas flow calibration laboratory. No other EPA or environmental protection gas flow calibration laboratory can match our Scope of Accreditation. Bios is also happy to perform calibrations and refurbishment services on other manufacturer's flow transfer standards so please ask us about our calibration offerings. The new Definer 110 is a perfect choice when adding new orifice based flow transfer standards to your organization's ambient monitoring equipment inventory.
Last week Bios engineers performed successful field
calibrations using the new Definer 220 primary calibrator with the
latest Met One Super SASS speciation sampler. Three US EPA staff
members an two state EPA staff members were present for the testing
which validated the use of the Definer 220 as an acceptable flow
standard for the calibration of these modern, highly capable compliance
monitoring speciation samplers. 
