The Model 408AO-7619 Durometer is designed to measure Type AO hardness per ISO 7619-1 Standard. This instrument measures the indentation hardness of vulcanized or thermoplastic rubber in low hardness range and cellular rubbers. The instrument has 1/2 point accuracy for the most precise measurements. The Durometer comes standard with a Magnetic Max Hold hand, which will retain it's peak reading when needed. The case tapers to a 1" x 1" base to allow better access to confined areas and still meet the required minimum base area of 500 mm². A removable top knob permits both easy hand held use or attachment to a Test Stand.

Place the specimen on a flat surface and apply the presser foot to the specimen as rapidly as possible without shock, keeping the foot parallel to the surface.The standard test time shall be 3 seconds for vulcanized rubber and 15 seconds for thermoplastic rubber. Make 5 tests at least 1/4" apart and report the results and their median value.

Specifications & Dimensions

Specifications	PTC® Analog Ergo Durometer 408
Accuracy	±1/2 point
Max Hand	Magnetic Max Hand
Display	Dial Gauge 240°
Gauge Features	0.2 point Reading Resolution
Base Size	1" x 1" ( 2.54cm x 2.54cm )
Height	4" ( 10.2cm )
Width	2.25" ( 5.7cm )
Indenter Shape	2.5mm ±0.02
Weight	6 oz.( 170g )
Certification	NIST Traceable/A2LA Accredited
Accessories	Test Stand Model 471, 472 ,or 1 kg weight 441
Meets or Exceeds	Meets ISO 7619-1)
ASTM Types	ASTM Type A, B, C, D, DO, E, O, OO

The Model 408 Durometer was selected by Lockheed Martin for the Orion Project.

America will send a new generation of explorers to the moon aboard NASA’s Orion crew exploration vehicle. Making its first flights early in the next decade, Orion is part of the Constellation Program to send human explorers back to the moon, and then onward to Mars and other destinations in the solar system.