Xiamen Tongchuang Handset Smoke Portable Opacity Meter

Overview

The Xiamen Tongchuang Handset Smoke Portable Opacity Meter is an engineered solution for in-situ measurement of diesel exhaust smoke opacity (N) and extinction coefficient (K) in accordance with internationally recognized regulatory frameworks. Based on the principle of light attenuation—where infrared or visible light passes through a defined-length gas cell and the degree of beam attenuation is quantified—the instrument delivers traceable, repeatable optical density readings directly correlated to particulate mass concentration in exhaust streams. Its fixed 215 mm optical path length ensures compliance with ISO 11614 (Stationary source emissions — Determination of the opacity of flue gases emitted from industrial plants) and EU Directive 2014/45/EU (Periodic roadworthiness tests for motor vehicles and their trailers), making it suitable for official roadside inspections, type-approval verification, and mobile emission audits.

Key Features

• Modular, handheld architecture optimized for field deployment—lightweight (< 3.2 kg) and ergonomically balanced for extended operator use during roadside or depot testing.
• Integrated automatic zero-point calibration and span verification routine, minimizing manual intervention and reducing drift-induced measurement uncertainty.
• Dual-parameter output: simultaneous real-time calculation and display of opacity (N, %) and extinction coefficient (K, m⁻¹), both traceable to NIST-traceable reference filters.
• High-resolution photodetector system with 0.01 m⁻¹ K-value resolution and electrical response time of 0.9 seconds—enabling dynamic capture of transient smoke events during acceleration cycles.
• Intelligent environmental management: automatic fan control prevents condensation buildup; programmable heating module maintains optimal detector temperature across ambient conditions (+5 °C to +40 °C).
• Bluetooth-enabled OBD-II interface synchronizes real-time engine RPM and coolant/oil temperature data—critical for correlation with smoke generation dynamics under load.
• 300 Wh rechargeable lithium-ion battery supports ≥8 hours of continuous operation (typical duty cycle), eliminating dependency on vehicle power or external AC sources during extended field campaigns.

Sample Compatibility & Compliance

The Handset Smoke meter is validated for direct sampling from diesel-powered internal combustion engines—including passenger cars, light- and heavy-duty trucks, buses, agricultural machinery, and non-road mobile machinery (NRMM). It accommodates exhaust gas temperatures up to 200 °C via optional high-temp probe accessories. All measurements adhere to the fundamental physical model defined in ISO 11614:2015, where K = (1/L)·ln(I₀/I), with L = 215 mm effective path length, I₀ = incident intensity, and I = transmitted intensity. The device meets the metrological requirements of EU 2014/45/EU Annex IV, Section 5.2.3 for opacity meters used in periodic technical inspections (PTI). It supports GLP-aligned documentation protocols when paired with certified Bluetooth thermal printers and timestamped data export.

Software & Data Management

Data acquisition, annotation, and reporting are managed via the proprietary Tongchuang SmokeLink desktop and mobile application suite (Windows/macOS/iOS/Android). Each measurement record includes GPS-tagged location metadata, operator ID, vehicle VIN (manually entered or OBD-pulled), test timestamp, ambient temperature/humidity, and raw photometric signal traces. Export formats include CSV (for statistical analysis in MATLAB or Python), PDF (audit-ready inspection reports), and XML (compatible with national emission monitoring platforms). Audit trails comply with ALCOA+ principles; all calibration events, firmware updates, and user actions are immutably logged with digital signatures. Optional integration with centralized fleet management systems via RESTful API enables automated regulatory submission to regional environmental authorities.

Applications

• Roadside enforcement of Euro V/VI emission limits by municipal environmental protection bureaus and traffic police departments.
• Pre-delivery inspection (PDI) and post-repair verification in authorized diesel service centers.
• Real-world driving emissions (RDE) testing support for OEM validation teams conducting PEMS-correlated opacity spot checks.
• Annual technical inspection (ATI) facilities operating under national accreditation schemes (e.g., CNAS, UKAS-equivalent bodies).
• Research applications in engine development labs assessing aftertreatment system efficiency (e.g., DPF regeneration events, SCR urea dosing effects on soot morphology).

FAQ

What standards does the Handset Smoke meter comply with?
It conforms to ISO 11614:2015 and EU Directive 2014/45/EU Annex IV for opacity measurement accuracy, repeatability, and operational robustness.
Is manual zero calibration required before each test?
No—automatic zero calibration is executed at power-on and prior to each measurement sequence, using an internal shutter and reference photodiode.
Can the device measure opacity under transient engine conditions?
Yes—the 0.9 s electrical response time and < 0.2 s gas-path rise time enable reliable capture of smoke spikes during WHTC or WHSC test cycles.
How is traceability maintained for field calibrations?
Each unit ships with a factory-issued calibration certificate referencing NIST-traceable neutral density filters; annual recalibration is recommended per ISO/IEC 17025 guidelines.
Does the instrument support remote firmware updates?
Yes—over-the-air (OTA) updates are delivered via Bluetooth or USB-C connection using signed firmware packages verified by embedded secure boot.