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  Home » Catalog » Portable Instruments » Particulate » HAZ-DUST IV Particulate Monitor

HAZ-DUST IV Particulate Monitor

Orderable Items The HAZ-DUST IV personal particulate monitor displays immediate breathing zone measurements, including TWA, STEL, Max, and Min without an impactor or sample pump. Interchangeable impactors for inhalable, thoracic, and respirable particulate are available. Use the HAZ-DUST IV for industrial hygiene and environmental air investigations.

  • Immediate display of particle concentration in mg/m3
    • Sensing Range: 0.01 to 200 mg/m3
    • Particle Size Range: 0.1 to 100 mg/m3

  • New selection feature for calibration and flow rate used with interchangeable sampling heads; choose from:

    • Inhalable — calibration to NIOSH Method 0500 and 2 L/min flow rate for use with IOM Sampler (available separately)

    • Thoracic — calibration to NIOSH 0500 and 2 L/min flow rate for use with Thoracic impactor (supplied with instrument)

    • Respirable — calibration to NIOSH 0600 and 2.75 L/min flow rate for use with GS-3 Cylone (available separately)

  • Operate without an impactor for total dust measurement by NIOSH 0500

  • Internal adjustable sample pump — 1 to 3.3 L/min

  • In-line 37-mm cassette directly behind sensor allows for concurrent filter sampling for gravimetric analysis

  • Audible alarm with adjustable threshold

  • Small and lightweight (1.5 lbs) with miniature sensor

  • DustComm Pro Software for downloading, basic trend analysis, and comprehensive graphical reporting

  • Run time over 8 hours with rechargeable NiMH battery

  • Highly accurate, NIST-traceable calibration
    • ± 10% to filter gravimetric SAE fine test dust





  • Determining levels of worker respirator protection for OSHA compliance

  • Reviewing compliance programs

  • Evaluating work practices and controls of any dust-generating practice

  • Performing safety audits

  • Monitoring welding fume exposures

  • Performing air quality studies in occupational health and industrial hygiene

  • Performing hazmat air quality investigations and monitoring waste site remediation

  • All air monitoring applications involving lung damaging particulates

  • Measuring total dust according to NIOSH Method 0500



Performance Profile
Accuracy ± 10% to filter gravimetric SAE fine test dust
Sensing Range 0.01 to 200 mg/m3
Resolution 0.01 mg/m3
Particle Size Range 0.1 to 100 µm
Precision ± 0.02 mg/m3
Calibration Respirable: NIOSH 0600 gravimetric reference — NIST-traceable SAE fine test dust at 2.75 L/min

Thoracic and Inhalable: NIOSH 0500 gravimetric reference — NIST-traceable SAE fine test dust at 2 L/min
Sample Flow Rate 1 to 3.3 L/min
Power Rechargeable NiMH battery
Operating Time > 8 hrs
Charging Time 10 to 12 hrs
Data Storage 21,500 data points
Digital Output RS-232
Dimensions Case: 5.5 x 3.25 x 2.75 in (14 x 8.3 x 7 cm)
Sensor: 1.75 x 1.5 in (4.4 x 3.8 cm)
Weight 1.5 lbs (0.68 kg)







Worker wearing HazDust sampling train
The HAZ-DUST, with new infrared detector, displays immediate breathing zone measurements and comprehensive graph reporting of aerosol and dust for industrial hygiene and environmental air investigations. Operate without an impactor for total dust measurement (NIOSH Method 0500) or target specific particle fractions by installing an inhalable, thoracic, or respirable impactor and selecting the appropriate calibration and flow rate. An in-line 37-mm cassette behind the sensor may be used to collect a concurrent filter sample for gravimetric or chemical analysis


HAZ-DUST IV with GS-3 Cyclone for real-time personal respirable silica monitoring

  • The only real-time personal dust monitor with both a sensor and a cyclone/filter cassette in the breathing zone

  • Concentrations over user-defined target levels can be further characterized and quantified by laboratory analysis of the filter

  • Real-time detection can also be used to determine and then mitigate peak exposures, which will lower TWA levels as well.


Easy-to-use HAZ-DUST IV
Four simple keys and menu-driven instructions displayed on an easy-to-read LCD make HAZ-DUST IV operation easy. Simply select from the menus the desired particle type, connect the appropriate impactor to the sensor, and use the selection switch on the monitor to apply the corresponding calibration and flow rate. Place a filter in the filter cassette behind the sensor, zero the unit, and clip the unit and sensor to a worker's clothing. Attach the HAZ-DUST IV onto the worker's belt. Use the four-button keypad to set the threshold alarm and begin monitoring.

HAZ-DUST IV Impactors

Inhalable Sampling Head SKC IOM Sampler Cat. No. 770-4204

Inhalable — SKC IOM Sampler
SKC IOM Sampler Cat. No. 770-115A

Thoracic sampling head included with the HAZ-DUST IV

Thoracic — HAZ-DUST IV
Impactor included with the HAZ-DUST IV Cat. No. 770-4107


SKC GS-3 Cyclone Cat. No. 225-103

Respirable — SKC GS-3 Cyclone 
SKC GS-3 Cyclone Cat. No. 225-103


Adapter for Respirable Impactor 770-313

Adapter for Respirable Impactor 770-313
required when using GS-3 Cyclone 225-103



Principle of Operation
HAZ-DUST IV operates on the principle of near-forward light scattering of infrared radiation. It immediately and continuously measures the concentration of airborne dust particles and displays the result in mg/m3.

What is near-forward light scattering?
This measurement technique uses an infrared light source positioned at a 90-degree angle from a photodetector. As the airborne particles enter the infrared beam, they scatter the light. The amount of light received by the photodetector is directly proportional to the aerosol concentration. Unique signal processing internally compensates for noise and drift.