Pyser-SGI Home Site

These high quality stage micrometers are used for routine calibration of a variety of optical measuring instruments, from light microscopes and eye pieces to x-y stages and optical benches. The stage micrometer is actually used as a "specimen" in order to calibrate for example, an eye piece reticle. For the professional light microscope user or researcher, these are the ultimate calibration standards for their light microscopes.

This means that the stage micrometers are available "traceable" either with or without a Graticules (e.g. Pyser-SGI) certification.

The single most often asked question is: Are these calibration standards Certified?
The stage micrometers on this page are not traceable to NIST through an unbroken chain of accredited laboratories, which would be the requirement if an A2LA or other assessor was asking the question. They are however, being offered as being traceable to the National Physical Laboratory in the United Kingdom, which has a Memorandum of Understanding with NIST, by special order. This does seem to satisfy the demands of most assessors, but that becomes a decision by your own assessor, not by SPI Supplies or anyone else.

So the lowest cost form of the stage micrometer product line is just our own (e.g. Pyser-SGI) statement that the products have been checked against traceable standards. The next lowest cost form is the same identical product but with a Pyser-SGI self-certification document.

Independent Laboratory Certified stage micrometers:
We can now offer the entire range of stage micrometers "certified". The certification can be done either by the above mentioned National Physical Laboratory in the United Kingdom or by UKAS (United Kingdom Accreditation Service) both of which are recognized by NIST in the USA and other standards making bodies in the rest of the world. This also means that when the micrometers are purchased "certified", the calibration is also directly traceable back to the international standard meter held in Paris at the BIPM (Bureau international des poids et mesures).

Are all stage micrometers created equal?
Absolutely not! At the risk of sounding like we are making mountains out of mole hills, we want to make the following "sales pitch" as to why one should consider spending a bit more for their stage micrometer but at the same time, getting a far higher quality product and package:

So for all of these reasons, we just did not believe we would be fair to our customers if we were not offering the very finest and most robust stage micrometers, and when you get right down to it, the difference in quality between the SPI stage micrometers and those offered at lower prices, very easily justifies the slightly higher prices.

Selection of the length of the micrometer scale:
The stage micrometers offered by SPI Supplies are offered in lengths ranging from 0.1 mm all the way up to our newest length of 20 mm, and with subdivisions as small as 2 Ám. So just who would benefit from a longer rather than smaller scale? For some, it is strictly a matter of convenience. But for others who might be calibrating a microscope reticle in the eye piece, having a stage micrometer that has a scale larger than the one in the eye piece enables one to calculate measurement errors and therefore, apply a correction factor to compensate. The prices for the 20 mm are slightly higher than the 10 mm versions but for those needing them, this is a small price incrementally for the value-added.

The stage micrometer is available in two different forms:

Transmitted illumination
For this version, the scale itself is protected by a micro cover glass exactly to correspond with the specimen it replaces. The majority of microscopes are corrected for examining specimens through a cover glass by transmitted light. The calibrated distance depends on the actual product selected, and can vary from 0.1 mm to 20 mm.

Reflected light illumination
We would recommend this version of the product for anyone using a metallurgical light microscope. Because most metallurgical samples are examined without a glass cover slip, this stage micrometer does not have a cover glass. Hence one also has to use greater care to protect the surface from accidental damage. The calibrated distance is 1.0mm in length.

Tips for extending useful life time:
Cleanliness is the rule at all times. Keep the stage micrometer free of dust through the use of SPI Two-In-One™ OK Easy™ Dusters. And when not in use in the microscope, it should be always in a protected (e.g. "clean" environment) and if it has to be set down on a surface, do not set directly onto a laboratory bench, but put it on a SPI-Wiper™ lint-free cotton wiper. For effective and damage-free dry cleaning, we recommend using only the SPI Supplies® Brand Lens Cleaning Tissues.

Stage Micrometers for Transmitted Light:

100 separate and distinct divisions (Style PS8)
Total length of micrometer scale: 1 mm
0.01 mm (10 Ám) per division

SPI #EachIn Stock
Traceable (with no certificate) 02265T-AB$310.77 Add to cartYes
Traceable (with Graticules Ltd. Certificate) 02265G-AB663.41 Add to cartYes
Certified UKAS 02265C-AB748.16 Add to cartYes
Certified NP 02265N-AB1,495.16 Add to cartNo

100 separate and distinct divisions (Style PS1)
Total length of micrometer scale: 10 mm
0.1 mm (100 Ám) per division

SPI #EachIn Stock
Traceable (with no certificate) 02205-AB$293.69 Add to cartYes
Traceable (with Graticules Ltd. Certificate) 02205G-AB647.97 Add to cartNo
Certified UKAS 02205C-AB732.62 Add to cartYes
Certified NP 02205N-AB1,479.76 Add to cartNo

Crossed scales of 100 separate and distinct divisions (Style PS16)
Total length of micrometer scale: 1 mm
0.01 mm (10 Ám) per division

SPI #EachIn Stock
Traceable (with no certificate) 02297T-AB$477.26 Add to cartNo
Traceable (with Graticules Ltd. Certificate) 02297G-AB832.81 Add to cartNo
Certified UKAS 02297C-AB1,112.00 Add to cartNo
Certified NP 02297N-AB2,662.33 Add to cartNo

50 separate and distinct divisions (Style PS12)
Total length of micrometer scale: 0.1 mm
0.002 mm (2 Ám) per division

SPI #EachIn Stock
Traceable (with no certificate) 02214-AB$481.87 Add to cartNo
Traceable (with Graticules Ltd. Certificate) 02214G-AB841.33 Add to cartNo
Certified UKAS 02214C-AB1,430.24 Add to cartNo
Certified NP 02214N-AB1,676.96 Add to cartNo

100 separate and distinct divisions (Style PS4)
Total length of micrometer scale: 0.1" long 0.001" divisions.
This is the finest imperial inch scale offered.

SPI #EachIn Stock
Traceable (with no certificate) 02298-AB$310.77 Add to cartYes
Traceable (with Graticules Ltd. Certificate) 02298G-AB663.41 Add to cartNo
Certified UKAS 02298C-AB748.16 Add to cartNo
Certified NP 02298N-AB1,495.16 Add to cartNo

2000 separate and distinct divisions (Style PS5)
Total length of micrometer scale: 20 mm
0.01 mm (10 Ám) per division

SPI #EachIn Stock
Traceable (with no certificate) 02353-AB$437.10 Add to cartNo
Certified UKAS 02353C-AB882.48 Add to cartNo
Certified NP 02353N-AB1,587.36 Add to cartNo

Stage Micrometers for Reflected Light:

100 separate and distinct divisions (Style PS78)
Total length of micrometer scale: 1 mm
0.01 mm (10 Ám) per division

SPI #EachIn Stock
Traceable (with no certificate) 02266T-AB$310.77 Add to cartYes
Traceable (with Graticules Ltd. Certificate) 02266G-AB663.41 Add to cartYes
Certified UKAS 02266C-AB748.16 Add to cartYes
Certified NP 02266N-AB1,495.16 Add to cartNo


PS52P PS52N Diagram

Stage Micrometers with Dual Scales, Metric and English, Postive and Negative Images: (PS52P and PS52N)

The PS52P is for transmitted light applications and has a bright chrome positive image. The PS52N has a negative pattern, formed in low reflective chrome for incident light applications to give excellent contrast. Both are ideal for calibrating optical products with large field of view, such as stereo microscopes or imaging systems.

PatternDescription SPI #EachIn Stock
PS52P Dual Micrometer Calibration Slide, 76mm x 25mm,
positive image, 50mm in 0.1mm divisions and 2" in
0.005" divisions, serial numbered, supplied in wooden case
02355-AB$574.72 Add to cartNo
PS52P with UKAS certificate 02355C-AB1,192.01 Add to cartNo
PS52N Dual Micrometer Calibration Slide, 76mm x 25mm,
negative image, 50mm in 0.1mm divisions and 2" in
0.005" divisions, serial numbered, supplied in wooden case
02356-AB574.72 Add to cartNo
PS52N with UKAS certificate 02356C-AB1,192.01 Add to cartNo