SahreA &D Hardness Tester

SahreA &D Hardness Tester for Manufacturing and Labs

Our SahreA &D Hardness Tester range covers digital and analogue instruments for soft elastomers (A-scale) and rigid plastics (D-scale). Built by an ISO9001-certified manufacturer, these gauges provide stable, repeatable readings for development, quality control, and incoming inspection. Durable mechanics and verified metrology support reliable daily use.

What A-Scale and D-Scale Measure

A-scale targets softer materials such as rubber, elastomers, and soft plastics. D-scale suits hard polymers, rigid thermoplastics, and semi‑hard rubbers. Selecting the correct scale yields meaningful hardness data for material selection and process control.

Core Features and Benefits

• Precision and repeatability: Controlled spring rates, defined indenter geometry, and tight tolerances minimize operator influence and shift-to-shift variation.


• Standards compliance: Designed and verified to meet ASTM D2240, ISO 7619‑1, ISO 868, and DIN 53505.


• Digital or analogue: Choose digital convenience (peak/hold, averaging, dwell time, data output) or analogue simplicity for quick shop‑floor checks.


• Built for uptime: Fast stabilization, clear displays, robust housings, and long‑life components help reduce downtime and total ownership cost.

Models and Accessories

Digital Models (A-scale, D-scale)

High-contrast displays with peak/hold, programmable dwell time, and optional USB/RS‑232/Bluetooth for LIMS/SPC. Suitable for seals, tires, soft TPEs, silicone parts, rigid plastics, and composites.

Analogue Models (A-scale, D-scale)

Maintenance-friendly gauges with no power requirement. Ideal for harsh environments and quick checks during extrusion or molding.

Test Stands and Reference Blocks

Motorized or lever stands apply constant load with controlled approach speed to improve repeatability, especially on small or curved parts. Certified A/D reference blocks and daily verification kits support traceability.

Technical Specifications

Measurement Parameters

A-scale

• Indenter: truncated cone per ASTM D2240/ISO 7619‑1


• Range: 0–100 HA; Resolution: 0.1 HA (digital) or 1 HA (analogue)


• Repeatability: ≤ ±1 HA (typical, model‑dependent)

D-scale

• Indenter: sharp cone per ASTM D2240/ISO 7619‑1


• Range: 0–100 HD; Resolution: 0.1 HD (digital) or 1 HD (analogue)


• Repeatability: ≤ ±1 HD (typical, model‑dependent)

Operating Conditions and Power

Operating temperature 10–40°C; humidity ≤85% RH non‑condensing. Digital units use a rechargeable battery or DC adapter with sleep mode.

Data and Connectivity

Digital instruments offer USB/RS‑232/Bluetooth data export with optional software for time‑stamped logging, averaging, and batch reporting.

Selection and Test Method

Picking the Scale

Use A-scale for approx. 20–90 HA elastomers and D-scale for approx. 50–90 HD rigid plastics. For borderline cases, consider a dual‑scale kit or verify on samples.

Sample Prep and Procedure

Use specimens at least 6 mm thick or stack layers. Test on a flat, rigid backing or with a stand. Apply the indenter perpendicular to the surface, hold a consistent dwell (typically 1–3 s), and average several readings.

Applications

Covers plastics and rubber across automotive, aerospace, wire and cable, and packaging. Typical materials include TPE, TPU, silicone, NBR, EPDM, PVC, ABS, PC, and filled polymers for formulation tuning and consistency checks.

Quality and Support

Backed by 17+ years of engineering and National High‑Tech Enterprise qualification. ISO9001 processes and in‑house CNC machining ensure stable mechanics and consistent quality. Custom fixtures and OEM options are available, with service across 50+ countries.

Installation, Calibration, and Care

Units ship with factory calibration and optional traceable certificates. Setup is simple: verify zero, perform a quick reference check, and begin testing. Protect the indenter, avoid shock loads, store in the case, and schedule periodic verification with certified blocks.

FAQs

Q: What is the difference between A-scale and D-scale?
A: A-scale targets soft elastomers; D-scale targets harder plastics. Choose based on material and target range.

Q: Do I need a test stand?
A: For higher repeatability—especially on small or curved parts—a stand with constant load and controlled approach is recommended.

Q: Can I export data to SPC or LIMS?
A: Yes. Digital models support USB/RS‑232/Bluetooth output, with optional software for batch logging and statistics.

Contact the SahreA &D Hardness Tester manufacturer

Tell us about your material, part geometry, and documentation needs to receive a tailored configuration or a quotation.