Shengtai Instruments SD-2801A Petroleum Bitumen Penetration Tester

Overview

The Shengtai Instruments SD-2801A Petroleum Bitumen Penetration Tester is a precision mechanical instrument engineered for standardized determination of penetration depth in bituminous materials and lubricating greases under controlled thermal and temporal conditions. It operates on the fundamental principle defined in ASTM D5, ISO 2856, and GB/T 4509—where a standardized needle or cone is allowed to descend under gravity onto a horizontally leveled, temperature-equilibrated sample surface for a fixed duration (typically 5 seconds), and the vertical displacement (in 0.1 mm increments) is measured as the penetration value. This method provides a direct, reproducible index of material consistency at 25 °C—a critical parameter for asphalt grading, quality control in refinery operations, and specification compliance in road construction materials.

Key Features

• Digital high-contrast LCD display showing real-time penetration values with 0.01 mm resolution and ±1 penetration unit accuracy.
• Micro-adjustable dual-stage vertical positioning system (coarse + fine adjustment) ensures precise alignment of the needle tip to the sample surface prior to test initiation.
• Integrated constant-temperature bath subsystem maintains sample temperature at 25.0 ± 0.1 °C throughout the measurement cycle, meeting strict requirements of GB/T 4509 and ASTM D5.
• Programmable timer with ±0.1 s timing accuracy supports user-defined dwell durations from 1 to 60 seconds—enabling method flexibility for both standard and non-standard protocols.
• Compliant standard components: 102.5 ± 0.05 g conical penetrometer (per GB/T 269 for greases) and 2.5 ± 0.05 g needle assembly (per GB/T 4509 for bitumen), supplied with traceable calibration documentation.
• Optimized optical design includes cold LED illumination to eliminate thermal interference while enhancing operator visibility during sample loading and needle positioning.
• Robust aluminum alloy frame and vibration-damped base minimize mechanical drift and ensure measurement stability across repeated cycles.

Sample Compatibility & Compliance

The SD-2801A is validated for use with petroleum bitumen (penetration-grade asphalts), semi-solid lubricating greases, and other thermoplastic viscoelastic hydrocarbon-based materials. It accommodates standard sample containers per GB/T 269 (Ø100 mm × ≥65 mm depth) and GB/T 4509 (Ø55 mm × 35 mm depth). All mechanical and thermal performance parameters conform to national and international standards including GB/T 4509–2010, GB/T 269–2014, ASTM D5–22, ISO 2856:1999, and EN 1426:2015. The instrument’s design supports GLP-compliant laboratory workflows when paired with documented calibration procedures and operator training records.

Software & Data Management

The SD-2801A operates as a standalone electromechanical tester without embedded software or network connectivity. All measurements are recorded manually or via external lab notebooks. For laboratories requiring digital data capture, optional RS-232 or USB-to-serial interfaces can be integrated with third-party LIMS or ELN platforms using ASCII-based output protocols. While the device itself does not support 21 CFR Part 11 audit trails or electronic signatures, its mechanical repeatability and traceable calibration chain enable full integration into FDA- or ISO 17025-accredited quality systems when supported by SOPs covering instrument qualification (IQ/OQ), calibration frequency (recommended annually or per 500 tests), and operator competency verification.

Applications

• Quality assurance testing of penetration-grade asphalt binders in refinery QC labs and asphalt mixing plants.
• Batch release testing of NLGI-grade lubricating greases according to consistency classification (e.g., NLGI #2, #3).
• Research and development of modified bitumens, polymer-modified asphalts (PMB), and bio-based binders where consistency profiling is required.
• Third-party certification testing for highway construction projects governed by JTG E20–2011 (Chinese Highway Engineering Test Specifications).
• Educational use in university materials science and civil engineering laboratories for teaching rheological behavior of thermosensitive solids.

FAQ

What standards does the SD-2801A comply with?
It meets GB/T 4509–2010, GB/T 269–2014, ASTM D5–22, ISO 2856:1999, and EN 1426:2015 for penetration testing of bitumen and greases.
Is temperature calibration traceable to national standards?
Yes—optional NIST-traceable PT100 sensor calibration certificates are available upon request; internal bath calibration is performed against certified reference thermometers per ISO/IEC 17025 guidelines.
Can the instrument be used for non-standard penetration durations?
Yes—the programmable timer allows user-defined test durations from 1 to 60 seconds, supporting research protocols beyond the standard 5-second test.
What maintenance is required for long-term accuracy?
Annual mechanical inspection, needle/cone mass verification, and temperature bath calibration are recommended; cleaning of guide rods and lubrication of elevation mechanisms every 6 months ensures optimal repeatability.
Does Shengtai provide installation qualification (IQ) documentation?
Yes—custom IQ/OQ documentation packages, including equipment specifications, utility requirements, and acceptance criteria, are available for GMP-regulated environments upon order confirmation.