LF Apogee MQ-200 PAR Meter

[George]

Originally Posted by Samw

What does "good" multimeter mean? I have a multimeter but I don't know if it is good enough to work with this sensor. How do I tell?

A lot of cheap multimeters can't measure down to millivolt (mV) let alone lower range of mV. Look at your multimeter to see if you have mV or m under Volt selection.