ACCREDITED ISO 17025
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C Scale Durometers
PTC® Shore C Scale Classic Durometer #307CL
ASTM Type C Classic Durometer #307CL
Shore C Scale Analog Durometer Classic Style Model 307CL
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PTC® Shore C Scale Classic Durometer
Need a Durometer Stand? See Compatible Stands Below.
Made in the USA
Add Accredited Durometer Certification to ISO 17025
No written calibration certificate required
Add NIST/A2LA Durometer Certification [+$175.00]
Durometer Calibration Intervals? Please Select
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Compatible Test Stands
The Model 307CL Type C Durometer is designed to measure ASTM D2240 Type C hardness of Medium Hard Rubber, Elastomers and Thermoplastics.
Specifications Durometer 307CL
Max Hold Pointer Standard
Easy to Read 0 to 100 Point Dial
Accessory Test Stands Available
NIST/A2LA to ISO 17025 Certification Available
Includes Precision Aluminum Test Block
Meets or exceeds current ASTM D2240 Specs
Range (Type C) 0-100 points
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
475 5 kg Weight Stand
7000D Hydraulic Stand
Durometer Certification to ISO 17025
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Type D Rubber Test Block Kit #400D
PTC® Stand for C | D | DO Durometers #475
Durometer Stand Spring Load Cell 320
PTC® Hydraulic Stand C | D | DO Durometers #7000D
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