Tricolor Absorption Photometer Model 2901

• Eight sample channels and two reference channels
• Easy to operate and install (external computer and vacuum pump required)
• Multiple-wavelength light source (Red, Green and Blue, or Red, Green and UV)
• Data logging software included
• Up to 84 days of unattended operation on one filter at a PM2.5 loading of 10µg/m³ and an aerosol single scatter albedo of 0.95
• Internal heater eliminates RH filter artifact

• Fully characterized and field tested
• Low maintenance
• High sensitivity – detection limit of 0.02 µg/m³ black carbon mass
• Extremely compact – fits inside a 6.3 inch (16 cm) cube!
• Only 5 minutes required to change filter

Copyright ©2024 All specifications are subject to change without notice. BMI assumes no responsibility for inaccuracies in this document or for any obligation to update information in this document. BMI reserves the right to change, modify, transfer or otherwise revise this publication without prior notice.

*Some products may be shown with optional accessories, which are sold separately. Items shown may not be to scale.

The TAP comes with the TAP Reader software, a Graphical User Interface (GUI) for Windows™ PC (not included) to allow easy configuration and operation of the instrument. The TAP Reader allows you to set the sample average time, a fixed or variable sample time for each spot, start and end filter spots, as well as the transmittance threshold values to switch to a new spot. Published corrections are applied internally by the software and all raw and processed data are written to a data file on the PC so raw data may be reprocessed if desired. A data processing tool written in the Igor™ software language is provided to read and plot all TAP data for easy analysis.
The TAP Reader also automatically allows white filter checks to be performed when new filters are installed. Timelines of transmittance, absorption coefficients, black carbon mass concentrations, temperatures and sample flow rate are provided to easily monitor instrument performance. Indicators are provided of expected spot and filter life so you can plan for upcoming filter changes. The software is very flexible and uses a configuration file to remember the settings that best suit your needs.

The following optional accessories are available:

  TAP Brochure

  Operator’s Manual

  Peer-reviewed publications for TAP