Graticules Ltd. Measuring Scales

The glass scales present an easy to way re-calibrate important reticles.

Introduction:
A range of versatile portable measuring instruments which combine the accuracy of finely divided glass scales with the simplicity of magnifiers. These are ideal tools for the inspection bench, drawing office, workshop, and laboratory, especially the microscopy laboratory, when measurements exceeding the capacity of a magnifier on its own are needed. The measuring scale needs to be in close contact with the flat specimen.

Scale image as might be seen through magnifier

The instrument is built around a glass measuring scale, an accurate separation of the distance in vacuum deposited chromium on the underside of a 6 mm thick rectangular cross-section of glass. This is mounted in a metal frame finished in white enamel with sliding magnifiers which can be focussed individually on the critical points of the specimen to be measured. The slides run on stainless steel bearing rods.

The instrument is placed with the measuring scale in close contact with the specimen to be measured. One magnifier is positioned over one end of the length, the second magnifier at the other end. When only one magnifier is available (for example, the smallest model), it must slide from end to end.

If one of the data points corresponds to zero on the scale, the length will be that which is read off at the other end. However, it may be easier to align the scale with the length to be measured and to then determine the length from the two readings.

Certified calibration statements for the glass scales:
We can supply these four products with Certificates of Calibration by UKAS ( United Kingdom Accreditation Service) for an extra charge. Just place your order with the appropriate SPI # and you will get the desired level of certification. Full documentation supplied with the product when shipped.

Storage:
Each instrument is supplied ready for use in a polished wooden carrying case.

Listing of available products:

Model #	Scale Length	Sub-Divisions	No. of Magnifiers	Dimensions LxWxH	SPI #	Each	In Stock
CA150	150 mm	0.1 mm	1	220x52x60 mm	09719-AB	$ 921.68	No
CA310	300 mm	0.1 mm	2	380x52x60 mm	09720-AB	1350.01	No
CA710	450 mm	0.1 mm	2	535x52x60 mm	09749-AB	2079.56	No
CA510	12"(304.8 mm)	0.005"	2	14x2x2.4"	09750-AB	1387.37	No

With Certified Calibration by UKAS:

Model #	Scale Length	Sub-Divisions	No. of Magnifiers	Dimensions LxWxH	SPI #	Each	In Stock
CA150Cert	150 mm	0.1 mm	1	220x52x60 mm	09719C-AB	$ 1165.25	No
CA310Cert	300 mm	0.1 mm	2	380x52x60 mm	09720C-AB	1593.57	No
CA710Cert	450 mm	0.1 mm	2	535x52x60 mm	09749C-AB	2323.13	Yes
CA510Cert	12"(304.8 mm)	0.005"	2	14x2x2.4"	09750C-AB	1630.95	No

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