The DOP SOLUTIONS PHOTOMETER for testing HEPA and ULPA filters.
This Photometer meets or exceeds the current British, American, European and Australian requirements for filter testing with aerosol challenge efficiency or leak testing.
A basic instrument package with advanced and reliable technology.
TWO years warranty exceeds any other instrument available.


Weighs only 9kgs
Scanning probe options available
Quick setup, with QuickStart guide
Digital read-out : mass challenge in μg/l and downstream %penetration
Real time indication– fast response

Two stream solenoid switched – may be computer controlled or remotely operated
Switchable DNS makes upstream measurements stable and more accurate
Unrivalled stability – enables measurement to 99.9999% efficiency.
Visual & audible alarm.
Supported by trained technicians from our Service Centre in the UK or one of our overseas partners