1940 Dearborn Concentrometer in Case

Description

Offered is a Dearborn Concentrometer that was patented in 1940.  It's purpose was to measure the amount of solids in a liquid such as foreign material in water or salt in water or impurities in diesel fuel.  Quite a range of applications that you can amaze your neighbors with. The actual apparatus is housed in a wooden dovetailed case.  It is dirty as it has been sitting in a barn for many years and would need a clean.  It is also untested.  Patent date of 1940.
Buyer to pay actual shipping charge.  I will list Fedex Economy and USPS Parcel so check both of them out to see which one best meets your needs.
Ask any questions you may have and thanks for looking
SANWA KIT-8D Multimeter
Fully assembled kit, tested OK Mint condition.  Authentic SANWA multimeter with test internal leads
Made in Japan
Mint condition with original protective cover Tested OK
Drop shock proof - Taut band movement
Easy to carry hand strap
All clean battery compartment
Product Features and Specifications
DCV : ~600V DC, ACV : ~600V AC
Current: ~0.3A(DC), Resistance: ~20K Ohm
Battery: AAx2
Product Dimensions: 1.4 x 3.9 x 5.9 inches
Shipping Weight: 15.4 ounces
Item model number: KIT-8D
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