How to fix TSI Instruments DUSTTRAK 8533 flow error?
- BBrittany ShepherdAug 27, 2025
A 'Flow Error' on the front screen of your TSI Instruments Measuring Instruments indicates there may be pressure differences if sampling from a duct, a flow obstruction, a failing internal pump, or a clogged filter cassette. Attach both the input and the exhaust port into the duct. Remove any obstruction. Press any key to bypass the error. Replace the filter cassette. Factory service may be required.











