Fineness of Grind Gauges

Category: Coating Inspection, Fineness Density, Performance

Caltech India offers Fineness of Grind Gauges. Many types of solid materials must be ground or milled into finer particles for dispersion in appropriate liquid vehicles. The physical properties of the resulting dispersions, often called “grinds”, depend not only on the actual size of the individual particles, but also on the degree to which they are dispersed.

The Fineness Gauges are used to indicate the fineness of grind or the presence of coarse particles or agglomerates in a dispersion. It does not determine particle size or particle size distribution.

Grind gauges are used in controlling the production, storage, and application of dispersion products produced by milling in the paint, plastic, pigment, printing ink , paper, ceramic, pharmaceutical, food and many other industries.

The Fineness Gauges is a flat steel block in the surface of which are one or two flat-bottomed grooves varying uniformly in depth from a maximum at one end of the block to zero near the other end. Groove depth is graduated on the block according to one or more scales used for measuring particle size.

The degree of dispersion is indicated in Microns(µm) or Hegman(H), The Hegman scale ranges from 0 to 8 with numbers increasing as the particle size decreases.
0 Hegman =100 microns particle size
4 Hegman =50 microns particle size
8 Hegman =0 microns particle size

The gauge and its scraper are made of hardened stainless steel and have one or two grooves with a graded slope(dependent on the model chosen), graduated in microns, mils, NS (Hegman), the gauges have a tolerance of ±2µm

It confirms the below standards:ISO 1524, ASTM D3333, ASTM D1210, ASTM D1316, DIN EN 21524


Place a slight excess of sample in the deep end of the groove, and with the straight-edge scraper provided, draw the sample toward the shallow end of the groove. Rating GU are in term of the point on the scale where the oversize particles, or furrows made by them, first appear in substantial concentration.

Main Technical Parameters:

DescriptionOrder InformationGroove Size (L×W)RangesOverall dimensionGraduationNumber of Grooves
Single-Channel Grind GaugeBGD 241/0140×12.5mm0-15µm170×50×12mm0.625 µm1
BGD 241/10-25µm170×50×12mm1.25 µm1
BGD 241/20-50µm170×50×12mm2.5 µm1
BGD 241/30-100µm170×50×12mm5 µm1
Double-Channel Grind GaugeBGD 242/0140×12.5mm0-15µm175×65×12mm0.625 µm2
BGD 242/10-25µm175×65×12mm1.25 µm2
BGD 242/20-50µm175×65×12mm2.5 µm2
BGD 242/30-100µm175×65×12mm5 µm2
Wide-Channel Grind GaugeBGD 244/1140×37.0mm0-25µm175×65×12mm1.25 µm1
BGD 244/20-50µm175×65×12mm2.5 µm1
BGD 244/30-100µm175×65×12mm5 µm1

In India, we have various customers from Mumbai, Delhi, Bangalore, Chennai, Hyderabad, Ahmedabad, Kolkata, Surat, Pune, Jaipur, Lucknow, Kanpur, Nagpur, Visakhapatnam, Indore, Bhopal, Patna, Vadodara, Ghaziabad, Ludhiana, Coimbatore, Madurai, Nashik, Srinagar, Aurangabad, Dhanbad, Allahabad and Ranchi in India.

We also export our range of products to worldwide countries like USA, Canada, Chile, United Kingdom – UK, Spain, Germany, Italy, Dubai, Abu Dhabi, U.A.E, Oman, Saudi Arabia, Singapore, Kuwait, Iran, Indonesia, Thailand, and many more as well.

For any enquiry please fill up the following form or email to us at [email protected]