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Tag: ppb
PPB: Alliance for Safer Communities meeting notes, 4/9/13
2013-05-14 04:04:15| PortlandOnline
PDF Document, 25kbCategory: Downtown/Old Town/Chinatown Crime Prevention
Tags: notes
meeting
communities
alliance
PPB: Alliance for Safe Communities meeting agenda 5/14/13
2013-05-14 04:03:22| PortlandOnline
PDF Document, 90kbCategory: Downtown/Old Town/Chinatown Crime Prevention
Tags: meeting
safe
agenda
communities
PPB crime stats for week 17 of 2013
2013-05-14 03:20:09| PortlandOnline
PDF Document, 955kbCategory: Downtown/Old Town/Chinatown Crime Prevention
PPB crime stats for week 16 of 2013
2013-05-07 22:31:40| PortlandOnline
PDF Document, 813kbCategory: Downtown/Old Town/Chinatown Crime Prevention
Two-Stage Dilution System generates PPB and PPT gas standards.
2013-05-07 14:31:09| Industrial Newsroom - All News for Today
Using Trace Source™ Permeation Tubes, Span Pac™ I – SD dilution system adds precisely known flow of span vapor into controlled, adjustable flow of clean matrix gas to create PPM calibration standard. Second dilution stage further dilutes mixture with matrix gas to lower concentration. Output concentration can be varied over range of up to 10,000:1 from single tube. System can also be used to create adjustable concentration while maintaining constant total flow with concentrations of up to 400:1. This story is related to the following:Test and Measuring InstrumentsPermeation Tubes | Calibrators | Calibrating Equipment |
Tags: system
standards
gas
generates
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