NMC210 Micro Carbon Residue Tester (Conradson Type)

Overview

The NMC210 Micro Carbon Residue Tester is a precision-engineered benchtop instrument designed for the quantitative determination of carbon residue in petroleum products according to ASTM D4530—Standard Test Method for Determination of Carbon Residue (Micro Method). Unlike traditional Conradson carbon residue (CCR) testers that require large sample volumes and open crucibles, the NMC210 implements a closed, controlled-oxidation micro-method. It operates by thermally decomposing a precisely metered 2 mL or 16 mL sample under a regulated flow of oxidizing air within a calibrated furnace assembly. The residual char formed after pyrolysis and oxidation is gravimetrically determined as a mass percentage of the original sample. This method delivers high reproducibility, reduced operator exposure to fumes, and significantly lower consumable usage—making it suitable for routine QC laboratories operating under ISO/IEC 17025-accredited workflows and aligned with refinery process control requirements.

Key Features

• Fully automated operation with programmable heating profile compliant with ASTM D4530’s specified ramp rates, hold times, and final temperature (e.g., 500 °C ± 2 °C)
• Integrated mass airflow control system for precise delivery of oxidizing air (±1% flow accuracy), ensuring consistent oxidative conditions across runs
• Compact footprint (250 × 300 × 600 mm W × D × H) and lightweight design (15 kg) optimized for space-constrained analytical labs
• Dual-voltage compatible power supply (230 V / 50 Hz, 10 A) with internal circuit protection and thermal cutoff safeguards
• Modular sample holder architecture supporting interchangeable sample trays for flexible throughput configurations
• Robust stainless-steel furnace chamber with ceramic insulation and Class 1.0 thermocouple feedback for stable temperature uniformity (±3 °C across working zone)

Sample Compatibility & Compliance

The NMC210 accepts both borosilicate and quartz sample tubes conforming to ASTM D4530 dimensional and material specifications. Standard configurations include disposable 2 mL and 16 mL borosilicate tubes (Cat. No. 41001, 41002), reusable quartz tubes for ash-sensitive applications (Cat. No. 41003, 41004), and dedicated single-use packs (144 units per pack). Optional trays support up to six 16 mL tubes (Cat. No. 41006) or mixed loading of seven tubes (Cat. No. 41007). All accessories are traceably manufactured to meet ISO 9001 quality management standards. The instrument complies with ASTM D4530, IP 14, and meets essential safety requirements per IEC 61010-1 for laboratory electrical equipment. Data integrity features support GLP/GMP environments, including configurable audit trails when integrated with validated LIMS platforms.

Software & Data Management

While the NMC210 operates via embedded firmware with front-panel programming, it supports optional RS-232 or USB-to-serial connectivity for external logging and remote parameter configuration. When interfaced with compliant laboratory software, the instrument enables timestamped run records, operator ID tagging, and automatic export of raw weight data (pre- and post-test) in CSV format. All calibration events—including thermocouple verification and airflow sensor validation—are logged with user attribution and date/time stamps. For regulated environments, optional 21 CFR Part 11-compliant software modules provide electronic signatures, role-based access control, and immutable record retention—facilitating FDA and EU Annex 11 audits.

Applications

• Refinery feedstock screening: Quantifying coke-forming tendency of vacuum gas oils, coker feed, and FCC cycle oils
• Lubricant base oil qualification: Assessing thermal stability and sludge formation potential per API RP 1529
• Fuel specification compliance: Verifying carbon residue limits for marine distillate fuels (ISO 8217) and aviation turbine fuels (ASTM D1655 Annex A3)
• R&D formulation studies: Correlating additive package performance with residual carbon yield under simulated service conditions
• Contract testing laboratories: Supporting accredited carbon residue reporting for third-party certification and regulatory submissions

FAQ

What standards does the NMC210 comply with?
ASTM D4530, IP 14, and ISO 10370 (equivalent method); full compliance documentation available upon request.
Is nitrogen purging supported?
Yes—optional solenoid valves (Cat. No. 941667 for N₂, 941668 for air) enable inert pre-conditioning or alternative purge protocols.
Can the instrument be used for non-petroleum samples?
Not recommended; ASTM D4530 specifies applicability to petroleum distillates, residual fuels, and lubricating oils only.
How often must the thermocouple be recalibrated?
Annual verification against NIST-traceable reference is advised; field adjustment via Cat. No. 941669 thermocouple kit is supported.
Are consumables supplied with initial installation?
A starter kit (Cat. No. 41001 × 24 pcs, 41005 tray, cleaning tools) is included; bulk replenishment is available via authorized distributor channels.