CUBIC INSTRUMENTS Standard Portable Opacity Meter System for Non-Road Diesel Machinery and On-Road Diesel Vehicles
| Brand | CUBIC INSTRUMENTS |
|---|---|
| Origin | Hubei, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | Standard Edition |
| Instrument Type | Portable |
| Measurement Principle | Optical Transmission (Filter-Based Nephelometry) |
| Max. Permissible Error | ±2.0% for Opacity (N) and Absorption Coefficient (K) |
| Opacity Range | 0–99.99% (Resolution: 0.1%) |
| K-Value Range | 0–16 m⁻¹ (Resolution: 0.01 m⁻¹) |
| Engine Speed | 400–6000 rpm (Resolution: 1 rpm |
| Accuracy | ±10 rpm or ±1%) |
| Ambient Temperature | −20–60 °C (Resolution: 0.1 °C |
| Accuracy | ±4% rel. or ±0.5 °C abs.) |
| Relative Humidity | 5–99% RH (Resolution: 0.1% RH |
| Accuracy | ±5% rel. or ±3% RH abs.) |
| Atmospheric Pressure | 70–106 kPa (Resolution: 0.01 kPa |
| Accuracy | ±5% rel. or ±2 kPa abs.) |
| Oil Temperature (optional) | 0–200 °C (Resolution: 1 °C |
| Accuracy | ±5 °C abs.) |
Overview
The CUBIC INSTRUMENTS Standard Portable Opacity Meter System is a field-deployable, integrated emission measurement platform engineered for regulatory-compliant opacity assessment of diesel-powered non-road mobile machinery (NRMM) and on-road diesel vehicles. It operates on the principle of optical transmission—measuring the attenuation of collimated infrared light through an exhaust plume to determine both opacity (N, %) and the corresponding light absorption coefficient (K, m⁻¹), in strict accordance with the physical definitions established in ISO 8549, ISO 11614, and GB 3847–2018. Unlike scattering-based or filter-paper methods, this system employs a dual-beam, temperature-compensated photodetector architecture to minimize drift under variable ambient conditions and ensure high reproducibility across repeated free-acceleration cycles. Its portable, battery-integrated design enables direct vehicle-side testing without requiring fixed infrastructure, making it suitable for roadside inspections, factory gate audits, environmental enforcement campaigns, and periodic maintenance verification under real-world operating conditions.
Key Features
- Simultaneous real-time display of opacity (N, %) and light absorption coefficient (K, m⁻¹), fully traceable to national metrological standards per JJG 976–2010 and GB/T 3847–2018 Annex D.
- Integrated high-capacity lithium-ion battery powering the opacity meter, tachometer, and environmental sensor module—supporting >8 hours of continuous operation per charge; optional AC/DC adapter enables uninterrupted online use during extended inspection sessions.
- Unified hardware architecture: all core sensors—including engine speed pickup, ambient temperature/humidity/pressure transducers—are housed in a single ruggedized enclosure with IP54-rated ingress protection and shock-absorbing mounting.
- Automated free-acceleration test sequence compliant with GB 3847–2018 Clause 7.3.2 and GB 36886–2018 Clause 6.2, including automatic trigger detection, dwell time control, and peak-N extraction with digital smoothing algorithms.
- Optional video capture module with timestamped, GPS-geotagged HD recording for evidentiary documentation—synchronized with opacity waveforms and metadata for audit-ready chain-of-custody reporting.
Sample Compatibility & Compliance
The system is validated for use with compression-ignition engines meeting Euro III through Euro VI emission tiers, including agricultural tractors, construction equipment (excavators, loaders, bulldozers), industrial generators, and heavy-duty diesel trucks. All measurement outputs comply with statutory requirements defined in GB 3847–2018 (for on-road vehicles) and GB 36886–2018 (for non-road diesel machinery), including mandatory data logging intervals, uncertainty budgeting, and zero/span verification protocols. The opacity meter’s optical path geometry and wavelength selection (850 ± 30 nm) satisfy the spectral response criteria specified in ISO 11614:2021 Annex A. Device calibration certificates are issued against certified reference standards traceable to NIM (National Institute of Metrology, China) and include full uncertainty statements per GUM (JCGM 100:2008).
Software & Data Management
The embedded Android-based tablet runs proprietary CUBIC EmissionTest Suite v3.2—a GLP-aligned application supporting role-based user authentication, electronic signature workflows, and tamper-evident audit logs. All measurements are stored locally with SHA-256 hashing and automatically synced to secure cloud storage via LTE/WiFi. Export formats include CSV (with ISO 8601 timestamps), PDF reports (containing instrument ID, operator ID, location coordinates, and raw waveform plots), and XML files compatible with provincial environmental monitoring platforms (e.g., China’s MEP Online Reporting System). Software adheres to data integrity principles outlined in FDA 21 CFR Part 11 (electronic records & signatures) and supports configurable retention policies aligned with local environmental administrative regulations.
Applications
- Routine roadside enforcement by municipal ecological environment bureaus and traffic management authorities.
- Pre-delivery emission screening at OEM assembly lines and Tier-1 supplier facilities.
- Periodic technical supervision for fleet operators maintaining >10-unit diesel assets (e.g., logistics companies, municipal sanitation services).
- Environmental impact assessments during large-scale infrastructure projects involving NRMM deployment.
- Research-grade opacity profiling under transient load conditions, supported by high-frequency sampling (100 Hz) and post-hoc waveform analysis tools.
FAQ
Does this system meet China’s mandatory type-approval requirements for field-use opacity meters?
Yes. The opacity meter module has obtained CPAC (China Product Certification) approval under CNCA-C10-01:2020 and complies with the metrological verification regulation JJG 976–2010.
Can the system be used for loaded-mode testing (e.g., ASM or VMAS)?
No. This Standard Edition is designed exclusively for free-acceleration and snap-acceleration modes per GB 3847–2018. For loaded-mode applications, contact CUBIC for the Pro Edition equipped with chassis dynamometer interface capability.
Is firmware upgrade support provided remotely?
Yes. Over-the-air (OTA) updates are delivered via encrypted HTTPS channels and require multi-factor administrator authorization before installation.
What is the recommended calibration interval?
Annual calibration is required per GB/T 3847–2018 Section 8.2. Field zero/span checks must be performed before each daily shift using certified neutral-density filters and reference gas standards.
Are third-party data integration APIs available?
Yes. RESTful API documentation and JSON schema specifications are provided under NDA for integration with municipal environmental data platforms and enterprise asset management systems.
