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TYPE
PTC MODEL No. MAIN SPRING TRAVEL INDENTER DESCRIPTION INDENTER
IMAGE
APPLICATIONS
A
ASTM D2240
JIS K6253

ISO 868
201
211
306L
408
501A
511A

821 gf
1.81 LB
0.100 inch
travel
Truncated Cone
35° Included Angle
A Indenter Soft rubber, elastomers, neoprene,
silicone, vinyl, nitrile, and butyl,
soft plastics, felt, leather,
waxes, printing rollers
and similar materials
B
ASTM D2240
821 gf
1.81 LB

0.100 inch travel
Conical
30° Included Angle
B Indenter Rubber, elastomers,
use when off the high
end of the A scale

C
ASTM D2240

202C
212C
307CL
409C
502C
512C
4.53 kgf
10 LB

0.100
inch travel
Truncated Cone
35° Included Angle
C Indenter Medium hard
rubber or plastics
use when off the
low end of the D scale
D
ASTM D2240
JIS K6253

ISO 868
202
212
307L
409
502D
512D
4.53 kgf
10 LB

0.100 inch travel
Conical
30° Included Angle
D Indenter Hard rubber, plastics, acrylic,
delrin, kevlar, pvc, nylon,
lexan, epoxies and similar materials
DO
ASTM D2240
202DO
212DO
413
502DO
512DO
4.53 kgf
10 LB

0.100 inch travel
3/32" Spherical
Diameter
(2.38mm)
DO Indenter Dense textile
winding, medium
printing rollers
E
ASTM D2240
408E
501E
511E
821gf,
1.81 lbs
0.100 inch travel
0.200" Spherical
Diameter
(5.08mm)
E Indneter Medium density
textile windings,
soft rubber,
foamed
elastomers,wound
threads,yarn
O
ASTM D2240
201/O
211/O
410
501/O
511/O
821gf,
1.81 lbs
0.100 inch travel
3/32" Spherical
Diameter
(2.38mm)
Type O Indenter Soft printing rollers,
textile windings
OO
ASTM D2240
113gf,
4.0 oz.
0.100 inch travel
3/32" Spherical
Diameter
(2.38mm)
Type OO Indenter Sponge rubber,
very soft rubber
OOO
ASTM D2240
412
412L
113gf,
4.0 oz.
0.100 inch travel
1/2" Spherical
Diameter
(12.7mm)
Type OOO Indenter Very soft materials, (e.g.) open cell foam

SL
FOAM RUBBER

PTC STANDARD

142gf,
5.0 oz.
0.200 inch travel

1 cm2- Circular

(0.155in2)

Type SL Indenter Foam and sponge rubber,
cellular and gel-like material
CF
ASTM F1957-99
414CF 9.11kgf
20lbs
0.200 inch travel
.1/2" Spherical
Diameter
(12.7mm)
Type CF Indenter Composite Foam
Asker C
SRIS-0101
JIS K7312
601
603
604
611
855gf,
1.89 lbs
0.100 inch travel
0.200" Spherical
Diameter
(5.08mm)
Asker C Indenter
Medium density
textile windings, soft rubber,
foamed elastomers,
wound threads, yarn

Calibration and Certification

Calibration is the set of operations that establish, under specified conditions, the relationship between the values of quantities indicated by a measuring instrument and the corresponding values realized by standards. International Vocabulary of Metrology (VIM) The result of a calibration permits either the assignment of values of measurands to the indications or the determination of corrections with respect to indications.

The result of a calibration may be recorded in a document, sometimes called a calibration certificate or a calibration report. A measuring instrument can be calibrated by comparison with a known standard. An adjustment of the instrument is often carried out after calibration in order that it provides given indications corresponding to given values of the quantity measured.

PTC Metrology™ is Accredited by A2LA to ISO/IEC 17025 and ANSI/NCSL Z540-1 for durometer calibration.
NIST traceable certification is available for any durometer type covered by current ASTM D2440, ASTM F1957, ISO 868, ISO 7619, or DIN 53505 standards. The Calibration Report includes both "as received" and "as left" data on the force curve measurement. Durometer calibration includes: indenter geometry and extension, indicator linearity from 0 to 100, and mainspring force. Other durometer types, custom models, and durometers of any manufacture can also be certified by PTC Metrology™.

Metrology the science of measurement and its application

PTC Metrology

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