Shore OO Durometer Hardness Tester – for Ultra-Soft Materials, Foam, Sponge, Silicone, Gel, Rubber, Elastomers

The Shore OO durometer hardness tester is a precision instrument developed for measuring the hardness of ultra-soft materials that are too soft to be tested with Shore A or Shore D durometers. It uses a standard indenter and spring force to measure penetration depth, providing accurate hardness values between 0 and 100 Shore OO. This instrument is widely used for foam, sponge, silicone gel, soft elastomers, and rubber coatings, making it ideal for industries such as plastics, rubber, packaging, and medical products. The device is compact, portable, and easy to operate, offering both handheld use and compatibility with a test stand for more stable testing. Whether in the factory floor, laboratory, or field inspection, the Shore OO durometer provides reliable and repeatable results, helping manufacturers and engineers evaluate material softness with confidence.Technical SpecificationsModel: Shore OO Durometer Hardness Tester Hardness Scale: 0 – 100 Shore OO Resolution: 1 Shore unit Indenter Type: Hemispherical tip, Ø1.19 mm (0.047 in) Applied Force (at 100H): 113 gf ± 0.5 gf (1.11 N ± 0.005 N) Spring Force Range: 0 – 113 gf (0 – 1.11 N) Measuring Method: Indentation depth, ASTM D2240 / ISO 868 Display Type: Analog dial (0–100 scale) Accuracy: ±1 Shore unit Recommended Sample Thickness: ≥ 6 mm (0.24 in) Minimum Sample Area: 15 × 15 mm (0.6 × 0.6 in) Operating Temperature: 0 – 40 °C (32 – 104 °F) Product Dimensions: 115 × 60 × 25 mm (4.5 × 2.4 × 1.0 in) Net Weight: Approx. 200 g (0.44 lbs) Test Stand Compatibility: Handheld or mounted on durometer test stand Standards Compliance: ASTM D2240, ISO 868

• Designed for Ultra-Soft Materials – The Shore OO durometer is specially made for testing extremely soft materials such as foam, sponge, silicone gel, soft rubber, and elastomers, where Shore A or D cannot provide accurate results.
• Wide Hardness Range (0–100 Shore OO) – Provides reliable readings across the full Shore OO scale, making it ideal for evaluating the softness of silicone, gel pads, soft elastomer sheets, and flexible coatings.
• Precision Measurement – Equipped with a hemispherical indenter Ø1.19 mm and calibrated spring force (0–113 gf), the durometer delivers accurate and repeatable hardness values in compliance with ASTM D2240 and ISO 868 standards.
• Portable & Easy to Use – Compact and lightweight design (200 g only), suitable for handheld testing or use with a durometer test stand. Perfect for factory inspections, R&D, or on-site quality control.
• Durable Construction – Built with a sturdy analog dial, smooth pointer movement, and ergonomic grip, ensuring long-lasting performance in both industrial and laboratory environments.