Met One Instruments Aerocet 531 Mass Monitor/Particle Counter - AS IS 155426114542 Includes Tube Expander as pictured

Includes Tube Expander as pictured

Manufacturer Tektronix Model Number DTM920 SKU 19-35020 Ref 23-45998

Allen Wrench

5 SKU 19-70987 Ref 23-101528

Met One Instruments Aerocet 531 Mass Monitor/Particle Counter - AS IS 155426114542 Includes Tube Expander as picturedThis item is sold AS IS. No returns or exchanges are accepted. Condition For parts or not working Description When powering on, the screen only shows two blank lines and never boots. The buttons are responsive. For this reason, we are selling the unit AS IS for parts repair as a non working or incomplete unit. We have not tested inspected any further, item may have unknown issues we are not aware of. See all item photos for the condition of the unit.