Beckman Model M pH Meter Open Access

Författare/Upphovsman:

Kreditera:

https://digital.sciencehistory.org/works/h702q6471

Kort länk:

https://sewiki.info/b/c28ee

Källa:

Wikimedia Commons

Upplösning:

4838 x 4715 Pixel (68469736 Bytes)

Beskrivning:

Beckman Model M pH Meter Open Access: Wooden box with handle at top and metal latch closure at front; interior: instructions for use printed on paper and inset into box lid; top face: window at center reveals pH scale "7-14" and millivolts "0-400"; control knobs for "AP" and "STD" at right and left; power switch at bottom center of face; compartment for electrode (attached) at right.

Licens:

Public domain

Licenskommentaren:

This file was provided to Wikimedia Commons by the Science History Institute as part of a cooperation project.