Durometer Models

Mass produced since the 1930's and patented by Rex in 1947, the Model 1500 is still considered to be the best all around instrument of its kind. While other manufacturers have attempted to copy the Rex design, none can offer the quality of a Rex 1500. With its light weight and small size, the user can carry it at all times. Should it be dropped, even if not in its leather carrying case, it will not be damaged or become inoperative 99 times out of 100. Because the gauge is so durable, the Model 1500 comes with a lifetime guarantee. The key to the gauge's durability is its sliding vernier scale- there are no cams, gears, or levers to wear out. This vernier scale holds the maximum reading, and is especially useful for testing in hard to reach areas. The 1500 is made in accordance with ASTM D-2240 and is therefore fully as accurate as any dial models. The vernier scale is marked in increments of 5 points, and with a little practice, one can obtain readings to within 1 point. Features:

• Ultra lightweight
• Excellent for hard to reach places
• Virtually unbreakable
• Superior accuracy
• Precision construction
• Easy to read
• Holds reading until reset
• Furnished with a leather pouch

The Rex H-1000 Mini- Dial Durometer is both compact and easy to use. Its small dial face and included leather clip-on carrying case make it easy for an inspector to carry the gauge- for work around the shop, or out in the field. The H-1000 durometer holds the maximum reading until reset by pressing the button at the top of the gauge. The max-hold feature and small dial size make the H-1000 a good choice for hard to reach places, or for out of sight testing. Features:

• Small face (1.675" Diameter)
• Easily fits into your pocket or clipped on belt
• Increments of 1 from 0-100
• One year warranty
• Furnished with a leather carrying case

The Model 1600 Durometer is Rex's standard model for good reason. The gauge features a full-sized dial face for readability to within 1/2 point. The 1600 offers the maximum accuracy available in a dial model gauge at a minimum cost. Features:

• Large dial
• Full 360 degree sweep
• Superior 1/2 point accuracy
• Custom made carrying case
• One year warranty

Introduced in 1965, the Model 1700 was designed to enable the user to observe and measure the "creep" present in a specimen. Creep refers to the tendency of the durometer indentor to continue to penetrate a specimen over time, giving lower durometer readings. For example, if the durometer is held against a specimen in full contact and with constant pressure, the durometer reading will decrease over a period of seconds after the initial reading is taken. So, in a specimen with creep, the initial reading may be 35.0 durometer points, while the reading after three seconds may be 33.5 durometer points. The Model 1700 features a max- hand and an active hand so that creep may be observed. The max hand holds the maximum reading while the active hand can be observed creeping down the scale. The 1700 is equipped with a max-hand reset button on the top left of the gauge. Features:

• Holds reading until reset
• Reads maximum and creep
• Unique foolproof reset
• Superior 1/2 point accuracy
• Custom made carrying case

The Max-Hand 2000 durometer is Rex Gauge Co.'s latest innovation for the testing of specimens with creep. The Max-Hand 2000 has a max- hand and an active hand for observing the creep characteristics of a specimen. What makes the Model 2000 unique is the magnetic-drag maximum reset mechanism. The user simply rotates the reset knob on the front of the gauge to clear the previous reading. The simplicity of the reset mechanism ensures a lifetime of use, and makes the Max- Hand 2000 the most affordable durometer for testing specimens with creep.

Features

• Reads maximum and creep
• Cost effective, hand operated
• Holds maximum reading until reset
• Custom carrying case
• Superior 1/2 point accuracy
• One year warranty

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 factory tire specifications.

The 2100 is a handheld gauge weighing only 4.2 oz. The indicator case, bezel, and barrel are all billet machined aluminum. Because of its billet construction, and the fact that the durometer is manufactured in the USA by Rex Gauge Company (an industry leader in durometers for over 60 years), the craftsmanship that goes into the 2100 is unsurpassed. The gauge is furnished with a carrying case and a one year warranty.  

The Rex DD-3 Digital Durometer is the successor to the popular Rex DD-1. With its impressive list of features, the DD-3 is truly state-of-the-art, and is the ideal instrument for lab use. Some of the new features are: a new, larger direct drive LCD display, RS232 data ports for computer compatibility, a locking feature to prevent accidental erasure of tolerances, automatic shutoff, low battery warning, and new accessories such as MTI and SPC type printers, audio attachments and software. Features:

• High and low buttons for setting tolerance limits
• Solid state circuitry with LCD display
• Comes with batteries
• One year warranty
• Response speed is immediate
• Holds reading until reset
• 0.1 resolution
• Dial rotates up to 270°
• Custom made carrying case
• Certification included

Due to their "Modular Concept", Rex makes basic design changes to the probes or special indentors to customize the instruments.

• Slim Probe "A": Narrow Foot
  For checking narrow or irregular shapes. Foot size is .110 x .50". Can be modified to fit your particular needs.

• Chisel shaped, Angled Foot
  For hard to reach or narrow areas.

• Slim Probe "B": 3/16" Diameter Foot
  A thinner foot for reaching hard to get places. Can be modified to fit your needs.

• ASTM OO
  For checking human skin, foam, or soft rubber, The gauge is pictured with the OO/OOO constant load weight (top), and the extended foot (can be attached to any type or model Rex Durometer)

• Constant Load Weight
  This constant load weight can be attached to any model Rex Durometer with an 822g springload (types A, B and O). Because it provides the correct testing pressure on the gauge and acts as an extended foot, the constant load weight eliminates human error.

The indicator and barrels are made in the USA, and are calibrated to the ASTM-D2240 standard for durometer hardness testers.