This Davidson Model D-622 Reference Mirror is in good condition with a few visible surface scratches..

BMI Surplus, Inc. has a huge inventory of used, new and pre-owned Autocollimators for sale!
We will work with you individually to find the perfect set up for your application.

Buy online or give us a call at 781-871-8868. We have experienced customer service representatives standing by ready to help you!

BMI Surplus, Inc. is a dealer in used and sometimes new Surplus Scientific & Industrial Equipment – we cater to clients in search of items to be used for specific applications.
We do not offer a guarantee as many of our items are purchased by professionals in need of parts and pieces.
You will find many of our items listed on our website as untested or as parts or repair units even though in they are in good used condition.

**Shipping, Handling & Freight fees are dependent on your location..
We will provide a freight quote to meet your individual needs and work with you if you prefer to use your own carrier.
We have 33 years of experience shipping sensitive scientific instruments & industrial equipment!

Don’t see what you are looking for? Use our orange search box on the top right hand corner of this page to customize your search..
***MPN D-622
***OEM Davidson Optronics
***SKU*** 30344

Custom Sine Hinge Plate with Brunsen 194 Bubble Level, Cased.

This is an interesting sine bar arrangement. It is custom-made, however the machining is superb, and the components used to manufacture it of the highest caliber. It is missing the original Brown & Sharp micrometer spindle which measured to an accuracy of 0.0001 inches. The plate is equipped with a Brunson coincidence level, type 194.

The aluminum plate dimensions include

Base – 12 x 3 inches, 1 inch thick. Three leveling feet on 10 inch centers
Hinged upper plate – 12 x 3 inches, 0.75 inches thick.
Center-to-center distance (hinge to micrometer spindle) – 11 inches
Bore for missing micrometer is 0.875 inches in diameter

The plate comes in a nice fitted wood cabinet and is in excellent condition.

Photo set 1759.

BMI Surplus, Inc. has a huge inventory of used, new and pre-owned Metrology Equipment for sale.
We will work with you individually to find the perfect set up for your application..

Buy online or give us a call at 781-871-8868.We have experienced customer service representatives standing by ready to help you!

BMI Surplus, Inc. is a dealer in used and sometimes new Surplus Scientific and Industrial Equipment – we cater to clients in search of items to be used for specific applications. We do not offer a guarantee as many of our items are purchased by professionals in need of parts and pieces.
You will find many of our items listed on our website as untested or as parts or repair units even though they are in good used condition.
*Pricing on untested items are discounted at time of listing.

**Shipping, Handling and Freight fees are dependent on your location.
We will provide a freight quote to meet your individual needs and work with you if you prefer to use your own carrier.
We have 33 years of experience shipping sensitive scientific instruments and industrial equipment!

Don’t see what you are looking for? Use our orange search box on the top right hand corner of this page to customize your search..
***MPN
***OEM
***SKU*** 23169

This is a vintage Bausch & Lomb (B&L) Colorimeter.
This collectible piece has not been tested..

BMI Surplus, Inc. has a huge inventory of used, new and pre-owned Metrology Equipment for sale.
We will work with you individually to find the perfect set up for your application..

Buy online or give us a call at 781-871-8868.We have experienced customer service representatives standing by ready to help you!

BMI Surplus, Inc. is a dealer in used and sometimes new Surplus Scientific and Industrial Equipment – we cater to clients in search of items to be used for specific applications. We do not offer a guarantee as many of our items are purchased by professionals in need of parts and pieces.
You will find many of our items listed on our website as untested or as parts or repair units even though they are in good used condition.
*Pricing on untested items are discounted at time of listing.

**Shipping, Handling and Freight fees are dependent on your location.
We will provide a freight quote to meet your individual needs and work with you if you prefer to use your own carrier.
We have 33 years of experience shipping sensitive scientific instruments and industrial equipment!

Don’t see what you are looking for? Use our orange search box on the top right hand corner of this page to customize your search..

***MPN
***OEM Bausch & Lomb (B&L)
***SKU*** 28713

This microscope is very modular. The central component is the drawtube with focusing mechanism. The body of the instrument is fitted with a long 1 inch diameter threaded flange. The thread allows the microscope to be attached to various Gaertner instruments, such as the precisions cross slides, instrument bases with cross-support arms, among others. The rack and pinion focusing has a range of 38mm. The nominal optical tube length of the microscope is 160mm.

The basic microscope is supplied with a straight ocular adapter, however these instruments have the optional inclined image erection prism installed instead of the straight tube. The ocular is the standard type M242 Ramsden 10x.

Gaertner objectives are continuously threaded over their entire length (RMS standard thread) and have a locking ring. The continuous thread allows precise adjustment of the magnification ratio of the instrument when using micrometer eyepieces or filar eyepieces. Focal length of the objectives supplied with these instruments is 32mm (Gaertner part number M220).

With the addition of the erecting prism adapter, the normally inverted image produced by the standard Gaertner measuring microscopes is ‘re-inverted’ by use of a special roof prism. The M193 adapter also inclines the ocular at an angle of 60 degrees. The Gaertner catalog number is M193.

The adapter also increases the effective optical tube length of the microscope 26mm. The effect of this increase is to slightly increase the magnification while slightly decreasing the working distance and the field of view. The erecting prism replaces the standard eyepiece tube adapter. These normally have their own spider cross lines installed, however we often get them in with missing cross lines. These are offered at a reduced price. Glass reticles or scales may be installed by the user.

As outfitted, the instrument has the following characteristics:
48x total magnification.
36.6mm working distance
2.29mm diameter object field

These microscopes are in very fine condition cosmetically, and in perfect optical condition. Please note that they do not include the cross line reticle! Also lacking on these instruments is the one inch locking nut for the microscope thread.

BMI Surplus, Inc. is your best resource for new, pre-owned, recycled & refurbished Microscopes and Microscope Components. We will work with you individually to find the perfect microscope or microscope part for your application.

Buy online or give us a call with any questions at 781-871-8868. We’re here ready to help you!
**Shipping & Freight fees depend on your location. We will provide a shipping quote to meet your individual needs and work with you if you prefer to use your own carrier. We have over 33 years of shipping sensitive scientific instruments & industrial equipment. We ship with the utmost care!
***MPN
***OEM Gaertner Scientific
***SKU*** 23086