Nasal Ranger is the “state-of-the-art” in field olfactometry for confidently measuring and quantifying odor strength in the ambient air. The portable Nasal Ranger Field Olfactometer determines ambient odor Dilution-to-Threshold (D/T) concentration objectively with your trained nose.

The Nasal Ranger Package includes the Nasal Ranger with Nasal Mask, Odor-Filter Cartridges, Shoulder Strap, Carrying Case, as well as and extra pair of Odor-Filter Cartridges, 10-Comfort Mask Seals, and 10-Isopropyl Alcohol Mask Wipes.


  • Measure Odors with Precision - The Nasal Ranger provides a precise odor strength measurement that is consistent from place to place.
  • Truly Easy Odor Measurement - Not only easy to use, the Nasal Rager also user-friendly. The Nasal Ranger also opens doors and created interest in community odor issue.
  • The Nasal Ranger Package - The Nasal Ranger, Comfort Seals (10 pk), Mask Wipes (10pk), Universal Odor Filter Catridges (2 pair), Barrel Cleaning Brush, Operations Manual, Calibration Certificate.
  • Portability & Ease of Use - The Nasal Ranger allows facility to quantify odors around the perimeter in the surrounding community.
  • Essential Tool - The Nasal Ranger offers an innovative easy-to-use alternative to guessing odor strength.
  • Universal Odor – Filter Catridges - Easy to replace odor-filter catridges contain a proprietary blend of granular carbon to create odor free dilution air. 
  • Dilution-to-Threshold (D/T) - Quantify odor strength using D/T ratios: 64, 32, 15, 8, 4 and 2.
  • Custom D/T Nasal Ranger Dials - High D/T Dials ( 500, 400, 300, 200, 100 and 60 ) and custom ratios for your needs.
  • Evaluate Odor Mitigation - With the Nasal Ranger you can evaluate odor mitigation method and control effectiveness.
  • Nasal Mask - Teflon coated carbon-fiber epoxy ergonomically designed to fit your nose comfortably with a foam comfort seal.
  • Fun and Approachable - Operating the Nasal Ranger is easy enough for a child.
  • Calibrated for Accuracy - The Nasal Ranger uses a calibrated flow sensor to assure users a consistent inhalation rate.
  • Community Odor Monitoring - With the Nasal Ranger, you can investigate citizen odor complaints for determining odor sources.
  • Compliance - Confidently determine odor with the Nasal Ranger at the operations under compliance surveillance.
  • Create Credible, Defensible Evidence - Monitoring daily industrial operations on odor patrols, the Nasal Ranger documents baseline conditions and specific odor episodes.
  • Internationally Accepted - Throughout North America, South America, Africa, Europe, Asiaand Australia.
  • Research  - The Nasal Ranger successfully determined odor annoyance thresholds.


Standard Dilution-to-Threshold (D/T) Ratios:   2, 4, 8, 15, 32, and 64

High Range D/T Ratios available:   60, 100, 200, 300, 400, and 500 (Custom D/T Ratios available to your needs.

Accuracy:   +/- 10% Calibration

Weight:  2.0-lbs  (0.91 kg)

Dimensions:  14″ L x 7.5″ H x 4″ W  (35.5 x 19 x 10 cm)

Inhalation Rate:  16-20 LPM

Operating Range:  32 to 104F,  0 to 40C

Power Requirements:  Standard 9-Volt battery

Patent: U.S. Patent No. 6,595,037

EMC Verification: Emissions: EN61326:1997, Class B

Immunity: EN61326:1997, Industrial Location

Markings: CE 89/336/EEC (EMC); 92/59/EEC (General Safety)



Where can I buy a Nasal Ranger?

The Nasal Ranger may be purchased by contacting Odosys Services directly.


What does the Nasal Ranger measure?

The Nasal Ranger Field Olfactometer quantifies the perceived odor level as dilutions-to-threshold (D/T).  This is determined as the number of dilution needed to make the ambient air odor just detectable.


Who can use the Nasal Ranger?

Almost anyone can use the Nasal Ranger!  Commonly, air quality control managers, municipality managers and regulators, facility operators, and citizen groups are using the Nasal Ranger to quantify ambient odors.


How often do I need to change the odor filter cartridge?

The life of the odor filter cartridge will depend on how often it is used and the strength of the odors that it is filtering.  A reasonable rule-of-thumb is to replace the cartridge after 200-hrs of field use.  Stronger odors may require more frequent replacement.  Please see this video (right) for additional information and demonstration of the filter replacement.


What is the difference between Field Olfactometry and Laboratory Olfactometry?

Both threshold results are based on the dilution-to-threshold principle and are thus a similar measure.  Laboratory olfactometry, following ASTM E679 and EN13725, is best utilized when source odors are being measured (e.g. source stack emission).  Air dispersion modeling is then utilized to predict the impact of those source odors on the community.  Field Olfactometry is performed to quantify the odors in the community; therefore, it is a direct measure of the community impact at that specific moment in time.


How frequently should my Nasal Ranger be calibrated?

The Nasal Ranger should be sent to Odosys Services for annual calibration verification.                         



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Brunsfield Oasis Tower 3,
No 2, Jalan PJU 1A/7A,
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47301 Petaling Jaya,


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Fax: +60 3 7848 5801

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