Digital Model 4000是美国rex gauge雷克斯生产的邵氏硬度计，分为4000-A型和4000-D型，其产品更为客户喜爱，在整个橡胶件的生产过程中被广泛使用，其产品特征如下：
Includes NIST Calibration Certificate 有NIST的证书
Conforms to ASTM D-2240, DIN 53505, ISO 868 and ISO 7619，按照美标ASTM-2240设计
set DWELL TIME，可以设置时间
18mm Diameter Presser Foot ，18mm直径
Large LCD Display，大的LCD显示屏
Maximum Reading Hold
Custom Made Carrying Case
Solid state circuitry with LCD display
High and low buttons for setting tolerance limits
AC Adapter and Batteries Included
Response speed is immediate
Holds reading until reset
0.1 resolution
Dial rotates up to 270°
Extra-Large Number Display
200 Measurement Readings can be stored inside the indicator and viewed on the LCD
Capable of USB and RS232 Comminication with Rex Approved Cables
Description:
Tire hardness can be a critical factor in setting up a race car. A tire that's too hard may sacrifice traction, while a tire that's too soft may give great traction but wear too quickly, and an unmatched set of tires may result in an ill handling car. To properly set up a car, a measure of tire hardness is necessary, and the easiest and most cost-effective way to obtain such a measure is to use a durometer.
The Type A durometer as specified by ASTM D-2240 is the gauge used by tire manufacturers to measure hardness of tire rubber. The gauge gives readings of hardness in durometer points on a scale of 0-100, with 100 being the hardest reading. Some race tires come from the factory with the durometer hardness noted on the side wall, but factors such as ambient temperature, track temperature, usage, and age of the tire can change the actual hardness of the tire from the factory hardness.
Rex Gauge Company's 2100 Tire Durometer allows racers to quickly and accurately make checks of tire hardness. Unlike other "racing durometers" （which are just relative hardness gauges）, the Rex 2100 is calibrated to the ASTM D-2240 standard for durometer hardness and is traceable to N.I.S.T. Thus, the Rex 2100 allows comparison with the fac |
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