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G-23 THOMPSON GRATICULE, 19MM. For counting particles in any of three areas of known size, calibrated in the same manner as a normal eyepiece scale, Thompson for dust analysis, 10mm, 7mm, and 4mm squares, glass sandwich, diameter: 19mm

METALURGICAL GRATICULES, G55, 19MM. ASTM 25 point square grid, glass sandwich, diameter: 19mm

METALURGICAL GRATICULES, G55, 21MM. ASTM 25 point square grid, glass sandwich, diameter: 21mm

METALURGICAL GRATICULES, G54, 21MM. ASTM 24 point circular grid, glass sandwich, diameter: 21mm

METALURGICAL GRATICULES, G55, 16MM. ASTM 25 point square grid, glass sandwich, diameter: 16mm

METALURGICAL GRATICULES, G54, 19MM. ASTM 24 point circular grid, glass sandwich, diameter: 19mm

METALURGICAL GRATICULES, G54, 16MM. ASTM 24 point circular grid, glass sandwich, diameter: 16mm

METALURGICAL GRATICULES, G46, 21MM. ASTM grain sizing E19-46, root 2, glass sandwich, diameter 21mm

METALURGICAL GRATICULES, G46, 19MM. ASTM grain sizing E19-46, root 2, glass sandwich, diameter 19mm

METALURGICAL GRATICULES, G45, 21MM. ASTM grain sizing E19-46, glass sandwich, diameter 21mm

METALURGICAL GRATICULES, G44, 21MM. ASTM E45, Root 2 sides, 7.1 mm square, 10 mm scale, diameter 21mm

METALURGICAL GRATICULES, G45, 19MM. ASTM grain sizing E19-46, glass sandwich, diameter 19mm

METALURGICAL GRATICULES, G44, 19MM. ASTM E45, Root 2 sides, 7.1 mm square, 10 mm scale, diameter 19mm

METALURGICAL GRATICULES, G43, 21MM. grain sizing (E112) glass sandwich, diameter: 21mm

METALURGICAL GRATICULES, G43, 19MM. grain sizing (E112) glass sandwich, diameter: 19mm

METALURGICAL GRATICULES, G42, 21MM. Grain sizing (E112), Glass Sandwich, daimeter: 21mm

METALURGICAL GRATICULES, G42, 19MM. Grain sizing (E112) Glass Sandwich, diameter: 19mm

METALURGICAL GRATICULES, G41, 19MM. ASTM grain size austenite, glass sandwich, diameter 19mm

METALURGICAL GRATICULES, G41, 21MM. ASTM grain size austenite, glass sandwich, diameter 21mm

MAKLER COUNTING CHAMBER. For rapid semen analysis, two pieces of optically flat glass: chamber and the cover glass, which has a grid pattern of 1mm squares and a center area subdivided into 0.1mm squares, four quartz pins hold the cover glass for an exac

S60 HOWARD CELL FOR FRUIT JUICES. a glass slide 76mm x 35mm with a central circular island, used for counting mold fibers and spores in fruit juices, especially from tomatoes

S-52 SEDGEWICK RAFTER, GLASS. made from glass, with a chromium surface image, for use in water analysis, culture inspection, and any fluid where particles per unit volume need to be determined, intended for professional use and when using phase contrast,

K20 CALIBRATED COVER GLASS. The coverglass has 25 calibrated fields of 1.382mm diameter through which to view the particles, this coverglass removes the necessity of precise adjustment of the microscope and eyepiece graticule in the original Howard metho

S-50 SEDGEWICK RAFTER, PLASTIC. an economically priced plastic cell for use in water analysis, culture inspection, and any fluid where particles per unit volume need to be determined, each cell is supplied with one cover glass

NPL CERTIFICATION FOR SI - S70. NPL Certification for SI - S70

NAMAS CERTIFICATION FOR SI - S70. NAMAS Certification for SI - S70

S8 MICROMETER STANDARD W/ NPL CERT. available with a certificate giving details about their accuracy, these calbrated standards provide traceability for the precise calibration and confirmation of accuracy of optical measuring instruments, which is nece

S8 MICROMETER STANDARD W/ UKAS CERT. available with a certificate giving details about their accuracy, these calbrated standards provide traceability for the precise calibration and confirmation of accuracy of optical measuring instruments, which is nec

S8 MICROMETER STANDARD W/ GRATICULES CERT. available with a certificate giving details about their accuracy, these calbrated standards provide traceability for the precise calibration and confirmation of accuracy of optical measuring instruments, which

S78 MICROMETER STANDARD W/ NPL CERT. available with a certificate giving details about their accuracy, these calbrated standards provide traceability for the precise calibration and confirmation of accuracy of optical measuring instruments, which is nec

S78 MICROMETER STANDARD W/ UKAS CERT. available with a certificate giving details about their accuracy, these calbrated standards provide traceability for the precise calibration and confirmation of accuracy of optical measuring instruments, which is ne

S78 MICROMETER STANDARD W/ GRATICULES CERT. available with a certificate giving details about their accuracy, these calbrated standards provide traceability for the precise calibration and confirmation of accuracy of optical measuring instruments, which

S5 MICROMETER STANDARD W/ NPL CERT. available with a certificate giving details about their accuracy, these calbrated standards provide traceability for the precise calibration and confirmation of accuracy of optical measuring instruments, which is nece

S5 MICROMETER STANDARD W/ UKAS CERT. available with a certificate giving details about their accuracy, these calbrated standards provide traceability for the precise calibration and confirmation of accuracy of optical measuring instruments, which is nec

S4 MICROMETER STANDARD W/ NPL CERT. available with a certificate giving details about their accuracy, these calbrated standards provide traceability for the precise calibration and confirmation of accuracy of optical measuring instruments, which is nece

S4 MICROMETER STANDARD W/ UKAS CERT. available with a certificate giving details about their accuracy, these calbrated standards provide traceability for the precise calibration and confirmation of accuracy of optical measuring instruments, which is nec

S4 MICROMETER STANDARD W/ GRATICULES CERT. available with a certificate giving details about their accuracy, these calbrated standards provide traceability for the precise calibration and confirmation of accuracy of optical measuring instruments, which

S1 MICROMETER STANDARD W/ NPL CERT. available with a certificate giving details about their accuracy, these calbrated standards provide traceability for the precise calibration and confirmation of accuracy of optical measuring instruments, which is nece

S1 MICROMETER STANDARD W/ UKAS CERT. available with a certificate giving details about their accuracy, these calbrated standards provide traceability for the precise calibration and confirmation of accuracy of optical measuring instruments, which is nec

S1 MICROMETER STANDARD W/ GRATICULES CERT. available with a certificate giving details about their accuracy, these calbrated standards provide traceability for the precise calibration and confirmation of accuracy of optical measuring instruments, which

S16 MICROMETER STANDARD W/ NPL CERT. available with a certificate giving details about their accuracy, these calbrated standards provide traceability for the precise calibration and confirmation of accuracy of optical measuring instruments, which is nec

S16 MICROMETER STANDARD W/ UKAS CERT. available with a certificate giving details about their accuracy, these calbrated standards provide traceability for the precise calibration and confirmation of accuracy of optical measuring instruments, which is ne

S12 MICROMETER STANDARD W/ NPL CERT. available with a certificate giving details about their accuracy, these calbrated standards provide traceability for the precise calibration and confirmation of accuracy of optical measuring instruments, which is nece

S12 MICROMETER STANDARD W/ UKAS CERT. available with a certificate giving details about their accuracy, these calbrated standards provide traceability for the precise calibration and confirmation of accuracy of optical measuring instruments, which is nec

S29, 0.01MM GRID/1.5X1.5MM OVERALL. 0.01mm grid / 1.5 x 1.5 mm overall

S28, 0.01MM GRID/0.2X0.2MM OVERALL. 0.01mm grid / 0.2 x 0.2mm overall

S9, COUNTING SLIDE 0.1MM SQUARE. Counting slide 0.01mm squares

S10, COUNTING SLIDE 0.05MM SQUARE. counting slide 0.05mm squares

STAGE GRATICULES, S78. scale is etched through highly reflective vacuum coated metal, When viewed under vertical illumination the scale appears black against a bright background, micrometer scale 1mm in 0.01mm divisions

STAGE GRATICULES, S12. intended for the routine calibration of eyepiece patterns when alternating between objectives on one microscope or using the same graticule in different microscopes, type/length: Horizontal/0.1mm, divisions: 50, division size 0.002

STAGE GRATICULES, S21. For speedy determination of a range of featured sizes within a given specimen, micrometer scale 5mm in 0.5mm divisions, 2mm in 0.1mm divisions, and 0.2mm in 0.01mm divisions

STAGE GRATICULES, S20. double micrometer scale 2mm in 0.01mm divisions and 0.1in 0.005 divisions

STAGE GRATICULES, S1. intended for the routine calibration of eyepiece patterns when alternating between objectives on one microscope or using the same graticule in different microscopes, type/length: horizontal/10mm, divisions: 100, division size 0.1mm

STAGE GRATICULES, S48. intended for the routine calibration of eyepiece patterns when alternating between objectives on one microscope or using the same graticule in different microscopes, type/length: no coverglass/1mm, divisions: 100, division size 0.0

STAGE GRATICULES, S16. intended for the routine calibration of eyepiece patterns when alternating between objectives on one microscope or using the same graticule in different microscopes, type/length: crossed scale/1mm, divisions: 100, division size 0.0

STAGE GRATICULES, S22. intended for the routine calibration of eyepiece patterns when alternating between objectives on one microscope or using the same graticule in different microscopes, type/length: vertical scale/2mm, divisions: 200, division size 0.

STAGE GRATICULES, S11. intended for the routine calibration of eyepiece patterns when alternating between objectives on one microscope or using the same graticule in different microscopes, type/length: Horizontal/0.005, divisions: 50, division size 0.0

S5 STAGE MICROMETER. intended for the routine calibration of eyepiece patterns when alternating between objectives on one microscope or using the same graticule in different microscopes, type/length: Horizontal/20mm, divisions: 200, division size 0.01mm

STAGE GRATICULES, S2. intended for the routine calibration of eyepiece patterns when alternating between objectives on one microscope or using the same graticule in different microscopes, type/length: Horizontal/5.0mm, divisions: 100, division size 0.05m

STAGE GRATICULES, S4. intended for the routine calibration of eyepiece patterns when alternating between objectives on one microscope or using the same graticule in different microscopes, type/length: Horizontal/0.1, divisions: 100, division size 0.001

HSE TEST SLIDE, S84. HSE test slide for calibration in asbestos analysis, indicates the maximum phase change passing through test objects to test slide, an epoxy replica of a master slide produced and certified by the National Physical Laboratory and mad

FOE PPL DOT VIBRATION TEST S25. The S25 pattern is an array of 20 pairs of dots converging on a single dot, distance between dot pair increases by 0.001 inch to a maximum of 0.02 inch, pairs being equispaced 0.25 inch, pairs of dots determine the amount

NGM1 MERTZ GRATICULE, 21MM. to estimate three-dimensional surface areas or surface density of a component in a given volume, when component does not have a random orientation, a test system with parallel curved lines for measuring intersection of points

NGM1 MERTZ GRATICULE, 19MM. to estimate three-dimensional surface areas or surface density of a component in a given volume, when component does not have a random orientation, a test system with parallel curved lines for measuring intersection of points

NGM1 MERTZ GRATICULE, 16MM. to estimate three-dimensional surface areas or surface density of a component in a given volume, when component does not have a random orientation, a test system with parallel curved lines for measuring intersection of points,

NG52 GRATICULE, 19MM. Chalkley point array, surface chrome image, this is used to quickly determine the relationship of components to each other using random sampling

NG52 GRATICULE, 21MM. Chalkley point array, surface chrome image, this is used to quickly determine the relationship of components to each other using random sampling

NG52 GRATICULE, 16MM. Chalkley point array, surface chrome image, this is used to quickly determine the relationship of components to each other using random sampling

NG5 GRATICULE, 21MM. Designed to extend the sizing range of globe and circle graticules, Fairs, grid length 4mm, glass sandwich

NG5 GRATICULE, 19MM. Designed to extend the sizing range of globe and circle graticules, Fairs, grid length 4mm, glass sandwich

NG5 GRATICULE, 16MM. Designed to extend the sizing range of globe and circle graticules, Fairs, grid length 4mm, glass sandwich

NG12 GRATICULE, 21MM. The NG12 is particularly useful since the array of globes and circles are conveniently close to where the particles pass, Modified Porton pattern globes/circles, surface chrome image

NG12 GRATICULE, 19MM. The NG12 is particularly useful since the array of globes and circles are conveniently close to where the particles pass, Modified Porton pattern globes/circles, surface chrome image

NG12 GRATICULE, 16MM. The NG12 is particularly useful since the array of globes and circles are conveniently close to where the particles pass, Modified Porton pattern globes/circles, surface chrome image

NG1 GRATICULE, 21MM. use to analyze specimens containing particles as an alternative, or in addition to, sieving when there are only limited quantities of particles or particles are smaller than 50 microns in diameter, Paterson globes/circles, surface c

NG1 GRATICULE, 19MM. use to analyze specimens containing particles as an alternative, or in addition to, sieving when there are only limited quantities of particles or particles are smaller than 50 microns in diameter, Paterson globes/circles, surface c

NG1 GRATICULE, 16MM. use to analyze specimens containing particles as an alternative, or in addition to, sieving when there are only limited quantities of particles or particles are smaller than 50 microns in diameter, Paterson globes/circles, surface c

G25 GRATICULE, 21MM. Calibration factors are required, Walton & Beckett for asbestos, 3:1 ratio, the Walton and Beckett have a series of shapes designed for comparison with fibers, glass sandwich, based on the G22, the G25 is produced by the Institute o

G25 GRATICULE, 19MM. Calibration factors are required, Walton & Beckett for asbestos, 3:1 ratio, the Walton and Beckett have a series of shapes designed for comparison with fibers, glass sandwich, based on the G22, the G25 is produced by the Institute o

G24 GRATICULE, 21MM. Calibration factors are required, Walton & Beckett for asbestos, 5:1 ratio, useful where the majority of fibers to be counted are shorter than 5 microns, the Walton and Beckett have a series of shapes designed for comparison with fi

G25 GRATICULE, 16MM. Calibration factors are required, Walton & Beckett for asbestos, 3:1 ratio, the Walton and Beckett have a series of shapes designed for comparison with fibers, glass sandwich, based on the G22, the G25 is produced by the Institute of

G24 GRATICULE, 19MM. Calibration factors are required, Walton & Beckett for asbestos, 5:1 ratio, useful where the majority of fibers to be counted are shorter than 5 microns, the Walton and Beckett have a series of shapes designed for comparison with fi

G24 GRATICULE, 16MM. Calibration factors are required, Walton & Beckett for asbestos, 5:1 ratio, useful where the majority of fibers to be counted are shorter than 5 microns, the Walton and Beckett have a series of shapes designed for comparison with fi

G22 GRATICULE, 21MM. Calibration factors are required, Walton & Beckett for asbestos, 3:1 ratio, useful where the majority of fibers to be counted are shorter than 5 microns, the Walton and Beckett have a series of shapes designed for comparison with fi

G22 GRATICULE, 19MM. Calibration factors are required, Walton & Beckett for asbestos, 3:1 ratio, useful where the majority of fibers to be counted are shorter than 5 microns, the Walton and Beckett have a series of shapes designed for comparison with fi

G22 GRATICULE, 16MM. Calibration factors are required, Walton & Beckett for asbestos, 3:1 ratio, useful where the majority of fibers to be counted are shorter than 5 microns, the Walton and Beckett have a series of shapes designed for comparison with fib

NG10 GRATICULE, 21MM. Circle areas double progressively, covers particles in the range 150 micron to 0.38 micron, British Standard (BS3625/BS3260) Globes & Circles. Surface chrome image

NG10 GRATICULE, 19MM. Circle areas double progressively, covers particles in the range 150 micron to 0.38 micron, British Standard (BS3625/BS3260) Globes & Circles. Surface chrome image

NG10 GRATICULE, 16MM. Circle areas double progressively, covers particles in the range 150 micron to 0.38 micron, British Standard (BS3625/BS3260) Globes & Circles. Surface chrome image

NGW2 GRATICULE, 21MM. Used when making a surface to volume ratio of a structure per mass unit, consists of a number of short lines with interruptions as long as the lines. Weibel type 2 for stereology, surface chrome image

NGW2 GRATICULE, 16MM. Used when making a surface to volume ratio of a structure per mass unit, consists of a number of short lines with interruptions as long as the lines. Weibel type 2 for stereology, surface chrome image

NGW2 GRATICULE, 19MM. Used when making a surface to volume ratio of a structure per mass unit, consists of a number of short lines with interruptions as long as the lines. Weibel type 2 for stereology, surface chrome image

NG2 EYEPIECE GRATICULE, 19MM. Circle areas of the Porton greaticules increases with Root 2 progression as do the divisions on the right hand side of the rectangle, these divisions are numbered for convenience, original Porton globes/circles, surface chr

NG2 EYEPIECE GRATICULE, 21MM. Circle areas of the Porton greaticules increases with Root 2 progression as do the divisions on the right hand side of the rectangle, these divisions are numbered for convenience, original Porton globes/circles, surface chr

NG2 EYEPIECE GRATICULE, 16MM. Circle areas of the Porton greaticules increases with Root 2 progression as do the divisions on the right hand side of the rectangle, these divisions are numbered for convenience, original Porton globes/circles, surface chro

GW3 GRATICULE, 19MM. Mertz for stereology, surface chrome image

GW3 GRATICULE, 21MM. Mertz for stereology, surface chrome image

GW3 GRATICULE, 16MM. Mertz for stereology, surface chrome image

NGW1 GRATICULE 16MM. Consists of 15 lines of equal length connecting the verticals of a regular hexagonal point network, Weibel Type 1 for stereology, surface chrome image

NGW1 GRATICULE, 19MM. Consists of 15 lines of equal length connecting the verticals of a regular hexagonal point network, Weibel Type 1 for stereology, surface chrome image

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