Sper Scientific D. O. Meter 850041 WORKS!
I did not try to clean it any further. I used an Amazon power adapter I had and it worked. See pictures. I will include the power adapter with this. You get everything you see in the pictures.
I did not try to clean it any further. I used an Amazon power adapter I had and it worked. See pictures. I will include the power adapter with this. You get everything you see in the pictures.