Nephelometers provide real-time and near real-time measurements of bulk particle properties such as average amount and size. We have a variety of models suitable for different uses. Please consult the chart on the nephelometer page for suggested model uses.
The table below gives a summary of the features of our nephelometer models and their suggested uses
| Model | Forward & Back Scatter Measurements | Three Wavelengths | High Speed Fan | Feedback Flow Control System | Multiple Size Bins | Determine Size Distribution | Suggested Uses |
|---|---|---|---|---|---|---|---|
| IN101 | ✔ | ✔ | Measurements of all particle sizes at normal ambient conditions | ||||
| IN101 Turbo | ✔ | ✔ | ✔ | For situations where higher pressure intake is required: high altitudes, clean condition, or long inlet tubes. | |||
| IN102 | ✔ | ✔ | ✔ | ✔ | ✔ | High precision measurements for various size cut-offs under all conditions for air quality & health and climate applications | |
| IN102Ex | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | High precision measurements for various size cut-offs under all conditions for air quality & health and climate applications with ability to obtain size distribution. |
IN101 - Nephelometer
Small and compact, the IN101 3-wavelength Integrating Nephelometer is enclosed in an environmentally protected case, ready for outdoor deployment in rugged conditions. Power requirements are 40W @ 120 VC (60W Max) and input power options include: 110/240 VAC,50/60Hz with provided power supply, and regulated 12VDC from sampling station with provided power connector. Other powering options can be made available upon request such as operating from batteries or solar power. Optional heaters are available at the expense of additional power consumption.
Data from the AirPhoton IN101 Integrating Nephelometer is saved in a removable SD memory card and can be linked to an external computer via RS485 or wirelessly via Bluetooth.
AirPhoton collected data with the IN101 nephelometer while exhibiting at the AGU meeting at the Moscone Center in San Francisco in December 2014. You can see the data here: Moscone Nephelometer. Additional data showing some very interesting results collected at night at the Moscone Center can be found on the AirPhoton Facebook page along with an explanation and the story behind the data.
The IN101Turbo Nephelometer is also available with and includes a high speed fan that is useful for situations where higher pressure intake is required (high altitudes, clean condition, or long inlet tubes)
IN102 Size Scanning Nephelometer
The IN102 Size Scanning Nephelometer lets you select the size of aerosol you wish to sample in the range from PM2.5 to PM10. Our feedback flow control system makes this possible. We use a sharp cut off cyclone inlet a custom made smart blower (fan) and carefully monitor and adjust the flow rate to achieve this versatility.
Like the IN101 model it is small and compact and is enclosed in an environmentally protected case, ready for outdoor deployment in rugged conditions. Power requirements are 40W @ 120 VAC (60W Max) and input power options include: 110/240 VAC,50/60Hz with provided power supply, and regulated 12VDC from sampling station with provided power connector. Other powering options can be made available upon request such as operating from batteries or solar power. Optional heaters are available at the expense of additional power consumption.
Data from the AirPhoton IN102 Scanning Nephelometer is saved in a removable SD memory card and can be linked to an external computer via RS485 or wirelessly via Bluetooth.
IN102Ex (extended range) Size Scanning Nephelometer
The IN102Ex Size Scanning Nephelometer extends the capabilities of our IN102 nephelometer aerosol to sample in the range from PM1 to PM10. The additional range of the measurements allows us to derive the full particle size distribution. We use the same feedback flow control system as described above for the IN102. See the video at the top of this page for a discussion of its capabilities and a demonstration of its ability to derive a size distribution.
AirPhoton IN102Ex Retrieves Aerosol Size Distribution!
We are very proud to be able to demonstrate the capability of our IN102 Extended range nephelometer to retrieve a full aerosol size distribution. See the video for a discussion of the instruments capabilities and a demonstration of our size distribution retrieval.
Model CR100 Clean Air Reference System
Airphoton Nephelometers are designed for stable and low noise operation. For more accurate operations a modular clean air reference system is available for separate purchase as an attachment to the Independence nephelometer models.
The CR100 clean air reference system is designed to compensate for potential calibration drift of the IN101 or IN102 nephelometer. The CR100 pumps ambient air through a high quality HEPA filter that removes aerosol particles from the air to a level that the clean air can be used as a Rayleigh scattering reference for the nephelometer. The CR100 can be used as a semi-permanent attachment to the body of the nephelometer or as a portable bench top reference system. The figure at left shows the CR100 system mounted on the body of a IN101 nephelometer.
Instrument Carrying Case Accessory
A custom-made carrying case is available for purchase to use with the IN101 nephelometer and its accessories. The case dimensions are: 31.3″x20.4″x12.2″ and is outfitted with wheels and a retractable handle for easy transport. Figure 9 shows the CC101 carrying case with a IN101 nephelometer and its accessories including the CR100 clean air system.
