Two Wavelength Integrating Nephelometer
The Ambilabs® 2WIN continuously monitors dust, smoke, particulates, and visibility indoors and outdoors — accurate even under extreme conditions, with patented light source technology (U.S. Patent 7,671,988 B2).
Continuous Ambient Particulate Monitoring
The Ambilabs® 2WIN Nephelometer is a robust ambient air-quality instrument designed to measure particle concentrations, ambient visibility, and source apportionment information.
The system includes an LCD display for measured parameters, flow rate, instrument status, and power. It also uses active humidity-controlled heating, detailed in Measurement Method below.
Built for ambient monitoring: The 2WIN Nephelometer combines aerosol scattering measurement, automatic calibration routines, humidity control, and integrated system components in one compact package.
Particle concentration, visibility, and source information from aerosol light scattering
The 2WIN Nephelometer determines particulate concentration by measuring total scatter from aerosols at each of its two operating wavelengths.
Comparing scattering between the two wavelengths yields the Ångström exponent, which is inversely related to particle size in the sample air. This helps provide information about the average particle size distribution.
Light Scattering
Measures total aerosol scatter to support particle concentration and visibility monitoring.
Ångström Exponent
Uses two wavelengths to help estimate particle size characteristics in the sampled air.
Active Heating
Warms the sample air and sample cell based on relative humidity, maintaining sample RH from below 30% to below 90% to help reduce moisture-related particle growth.
Auto Calibration
Includes purge air, automatic zero calibration, span checks, and optical reference calibration routines.
Wide measurement range for demanding monitoring applications
The instrument supports a wide scattering measurement range, with PM estimate output based on a user-selectable calibration.
Key Specifications
- PM Mass Estimate: Derived from real-time scattering coefficient, scaled via a user-defined calibration factor (not a fixed absolute range)
- Scattering Range: 0 to 20,000 Mm⁻¹
- Calibration: User-selectable PM calibration
- Sampling Option: Optional sharp-cut cyclones for PM1, PM2.5, or PM10 size fractions
- Technology: Patented light source technology, U.S. Patent 7,671,988 B2
Options & Accessories
- External pump control
- Nafion dryer inlet
- Solar/battery power option
- Weatherproof enclosure
- Roof flange/rain cap
- Calibration kit
Built for accuracy, repeatability, and low cost of ownership
The 2WIN Nephelometer is designed with integrated calibration, long-life LED technology, QA parameters, and compact packaging to support reliable long-term monitoring.
Automatic Calibration
Built-in calibration routines (see Measurement Method) help ensure repeatable measurements over time.
High Powered LED Source
A high powered LED light source supports measurement accuracy and long service life.
Integrated Package
Includes an internal sample pump, sample heater, calibration valves, zero air pump, and data logger.
Low Ownership Cost
The long-life LED source and integrated design help reduce long-term operating and maintenance costs.
Designed for ambient monitoring, research, and process measurement
The 2WIN Nephelometer can support a wide range of aerosol measurement applications where scattering data, particulate trends, and visibility information are important.
Ambient & Research
- Ambient air quality monitoring
- Aerosol and atmospheric research
- Climate and atmospheric monitoring
- Visibility studies
Particle & Source Analysis
- Light scattering measurement
- Source apportionment analysis
- Ångström exponent calculations
- PM estimate air quality information
Facility & Process Use
- Smoke monitoring
- Wildfire smoke monitoring
- Ambient dust monitoring
- Industrial process measurements
- Clean room particle monitoring
Integrated controls for stable ambient measurements
The instrument is designed to support consistent measurements with internal controls, quality assurance parameters, and automated check routines.
QA Parameters Available
QA parameters include a cleaning indicator (wall count) and lamp intensity drift (shutter count).
Sample Heater Control
Sample heater activation can be configured independently of the standard humidity-control routine (see Measurement Method).
Automatic Zero and Span Checks
These checks build on the calibration routine described under Measurement Method and can run at intervals of 1, 3, 6, 12, or 24 hours, or weekly.
Compact and Portable
The integrated design makes the unit compact, portable, and suitable for ambient shelters or monitoring facilities.
Ready to add the 2WIN Nephelometer to your monitoring program?
Contact Ambilabs to discuss configuration options, or review full specifications in the product brochure.