Caecilius wrote:

I'm looking for something that can monitor the power quality

I've got an old Seaward Mains Disturbance Recorder

You leave it plugged in, it counts the number of transients, and has
LEDs to indicate if the voltage has been out of range (mine's the old
240V +/- 6%, presume they are now calibrated for 230V +/- 10%) and if
there's been a brownout for more than 1/2 a cycle, or 2 cycles.

http://www.rnelectronics.com/meters/seaward-dr500-mains-supply-disturbance-recorder/flypage-ask.tpl.html