THIS HAS COME FROM A COLLECTORS HOUSE BUT I HAVE NO IDEA HOW TO TEST SO 100% UNTESTED AND WILL REQUIRE POWER SUPPLY/PAT TESTING ECT. The HP Hewlett Packard 8152A Optical Average Power Meter is a high-quality instrument used for measuring optical power within a specific wavelength range of 450 to 1700nm. This device, made in Germany, is ideal for industrial and office settings where precise measurements are essential. Despite being untested, this optical power meter from HP is a reliable tool for accurately measuring light intensity and power levels.
eBay