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Shore A Scale Durometers
> PTC® Classic Durometer 'Shore A Scale' Model 306L
PTC®'s Shore A Scale Durometer
PTC® Classic Durometer 'Shore A Scale' Model 306L
Do you require Certification to ISO/IEC 17025?
Add Durometer NIST/A2LA Certification [+$150.00]
No written certification required
Add 1 kg Load Weight Model 441
This weight provides a constant load for hand held measurements [+$145.00]
Add Durometer Test Stand for Increased Repeatability
PTC® Model 471 Durometer Deadweight Test Stand [+$975.00]
PTC® Model 7000A Hydraulic Test Stand [+$2,400.00]
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Accredited by A2LA to ISO/IEC 17025, ANSI/NCSL Z540-1.
Made in the U.S.A.
Compatible Test Stands
The Model 306L Type A Durometer is designed to measure ASTM (American Society for Testing and Materials) D2240 Type A hardness. This includes materials such as: rubber, elastomers, and other rubber-like materials including neoprene, silicone, vinyl, and butyl. Soft plastics, felt, leather, and similar materials generally fall into this same range. PTC® s Model 306L meets or exceeds current ASTM D2240 Specifications.
The instrument has a low glare aluminum dial with bold, easy to read numbers. The durometer comes standard with a Max Hold hand which retains the peak reading. A top knob with 8-32 threads permits both easy handheld use and attachment to test stands or the accessory
Model 441 1kg Constant Load Deadweight
. The Model 441 will allow even more consistent measurements when taking readings.
Each instrument is individually calibrated. A test block and sturdy carrying case are included with the durometer.
Specifications Sheet 306L
Max Hold Pointer Standard
Easy to Read 0 to 100 Point Dial
Accessory Test Stands Available
1kg Constant Load Weight Available (Model 441)
NIST/A2LA to ISO 17025 Certification Available
Includes Precision Aluminum Test Block
Accuracy of ±1 Point
Height 4 in. (10.2 cm)
Width 2-1/4 in. (5.7 cm)
Depth 1-3/4 in. (4.4 cm)
Weight 8 oz. (227 g)
Shipping Weight 3lb (1.4kg)
For a complete calibration check of mainspring, and visual and mechanical check of indenter, the instrument should be returned to PTC® (see Guarantee &Calibration Service) or refer to ASTM D2240 Specifications. PTC® recommends the unit be returned at least every 12 months for this check. For a quick field check, follow the guideline below. Under no circumstance should a test block be used as a standard to calibrate a durometer.
1. The pointer should read zero when no force is applied to the indenter of the durometer.
2. Hand hold the durometer and insert the indenter into the hole of the calibrated test block. Apply enough force to make firm contact between the top surface of the test block and the base of the durometer. The dial reading should agree with the value stamped on the check block (±1). Several tests should be made and the results averaged.
3. The indenter must protrude 0.098 to 0.100 inches below the base of the durometer.
4. When the indenter is fully displaced, the durometer should read 100 points. Use care as to not damage the tip of the indenter.
320 Spring Load Cell Stand
471 1 kg Deadweight Test Stand
7000A Hydraulic Stand
Durometer Certification to ISO 17025
Constant Load Weight 1kg Model 441
Rubber Test Block Kit for Durometers A, B and O Model 400A
Durometer Spring Load Cell Stand 320
PTC® Durometer Deadweight Test Stand Model 471
PTC® Hydraulic Durometer Test Stand Model 7000A
Aluminum Test Block ASTM Type A
PTC® Classic Durometer 'Shore A Scale' Half Point Accuracy Model 306L.5
PTC® Ergo Durometer 'Shore A Scale' Model 408
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