Particulate emissions are one of the first parameters environmental inspectors ask about, and one of the last that plant operators can afford to guess. The ONETEST-100D pipeline dust monitor was developed for plants that need a continuous, trustworthy reading of dust concentration inside the flue gas line — without calibration routines, air purging or frequent cleaning. Manufactured by ONETEST in Shenzhen, China, the instrument combines a wear-resistant 316 stainless steel probe, proprietary probe protection technology and a 4-20mA linear output to deliver real-time particulate data straight into the plant control system.
A bag filter or cyclone that fails silently releases dust for days before anyone notices. Manual gravimetric sampling is accurate but slow, and it tells you what happened yesterday, not what is happening now. Continuous in-line monitoring closes that gap: the moment bag damage, filter rupture or an upset in the process pushes dust levels upward, the pipeline dust monitor reports it, alarms on it, and lets maintenance act before the stack turns visible.
The ONETEST-100D also supports emission reporting and compliance documentation. Its 4-20mA signal is linearly proportional to particle mass content, so a single analog input on the existing PLC or DCS is enough to log dust trends, capture peaks and produce average values for environmental records.
A reliable sensor probe is mounted at the outlet of the flue gas pipeline, downstream of the dust collector. As dust particles pass near the probe, a weak charge signal is induced and carried through a dedicated coaxial cable to the control unit. The control unit processes that signal and outputs an absolute value that tracks particle mass concentration in real time.
To keep the measurement stable in difficult streams, ONETEST supplies proprietary probe protection technology that shields the sensor from conductive dust, condensate oil mist and water mist. The probe needs no air purging, and its 316 stainless steel body with Teflon protection resists both abrasion and corrosion. Installation is simple, calibration is not required, and the unit behaves as a genuine plug-and-play device.
| Detection range | 0–100 mg/m³, 0–500 mg/m³, 0–1000 mg/m³, 0–5000 mg/m³ |
|---|---|
| Resolution | 0.1% of the range |
| Precision | 5%FS |
| Power supply | 24VDC |
| Protection grade | IP66 (standard), other grades optional |
| Process connection | Thread (standard); quick clamping or flange optional |
| Probe material | 316SS stainless steel |
| Probe protection material | Teflon (standard), other materials on request |
| Insertion depth | 50 / 100 / 200 / 300 mm (standard) up to 1000 mm; must exceed the pipe radius |
| Max. probe temperature | 120°C standard, up to 220°C optional |
| Max. probe pressure | 70 kPa standard, 350 kPa version available |
| Certification | CE, explosion-proof |
Detection requires a gas flow velocity above 3 m/s and particles larger than 10 microns; both are typical of most industrial extraction systems, while special working conditions can be reviewed with ONETEST engineers before selection.
The ONETEST-100D pipeline dust monitor is available from a minimum order quantity of one piece, with payment by T/T and delivery in 5 to 15 working days. Monthly supply capacity is around 300 pieces, packed in cartons suitable for international shipping. Because insertion depth, temperature rating, pressure rating and process connection all depend on the installation point, buyers are encouraged to share pipe diameter, flue gas temperature and connection standard so the correct configuration is quoted first time.
For distributors, system integrators and environmental engineering contractors, the ONETEST-100D is a practical addition to a CEMS or dust suppression package: a single probe, a single 24VDC supply, a single 4-20mA loop, and continuous data from day one.
