1-203-402-0477 [email protected]


GrayWolf Instruments are in use around the world in a broad range of Indoor Air Quality, Industrial Hygiene, Heating Ventilation & Air Conditioning, Facility Management, Research & Development and other applications.

A very small sampling of our clients is listed below:

  • Agilent
  • AT&T
  • Google
  • Microsoft
  • Nokia Siemens Networks
  • Scripps Networks
  • Sentinel Mobile
  • Telcordia Technologies
  • The Weather Channel
  • Univision
  • Verizon Wireless

Learning to use the WolfSense software was easy and it made acquiring the readings very simple. The ease in which I can now collect the needed data and compile the completed report has allowed me to perform our Indoor Air Quality Surveys with much less difficulty. I do not require a second person to assist me. Our company is saving a good deal of money by not having to employ an outside contractor. In addition, I can respond to complaints within 12 hours, versus days, trying to get an outside contractor to respond. The WolfSense Software and instruments have proven flawless and reduced our costs.  …during the last nine years of doing the Indoor Air Quality Surveys, for our facilities, having the WolfSense System for the past six years has made my job simpler, the data more accurate, easier to collect and greatly improved producing reports.

John S. Russell
Building Technician

Education: Schools
  • Albuquerque (New Mexico) Public Schools
  • American Federation of Teachers
  • Brevard County (Florida) School Board
  • Dallas (Texas) Independent School District
  • Eastern Suffolk (New York) BOCES
  • Gwinnett County (Georgia) Board of Ed
  • Mesquite (Texas) Independent School District
  • New Orleans (Louisiana) Public Schools
  • Palm Springs (CA) Unified School District
  • Roanoke County (Virginia) Public Schools
  • Trumbull (Connecticut) Board of Education
  • Tulsa (Oklahoma) Public Schools
  • Winston-Salem Forsyth County (NC) Schools


  • Texas Women’s University (TX)  

Our university has used GrayWolf Sensing Solutions for many years. We just replaced an old anemometer that we had purchased from them, which had lasted us an incredibly long time. Working with GrayWolf to find the best fit for our university was a breeze; The local sales rep went above and beyond to provide an excellent experience. I would highly recommend GrayWolf Sensing Solutions to anyone needing indoor air quality meters.

Hope Z, Dept of Risk Management

  • American University of Beirut
  • Georgetown University
  • Harvard University School of Medicine
  • Hong Kong University of Science & Technology
  • James Madison University
  • Johns Hopkins University
  • Medical University of South Carolina
  • MIT Lincoln Laboratories
  • Princeton University
  • Purdue University
  • Seton Hall University
  • Texas A&M University
  • Tufts University
  • Universite de Rennes (France)
  • Universiti Sains Malaysia
  • University of Bahrain
  • University of Calgary
  • University of Massachusetts
  • University of São Paulo
  • Virginia Polytechnic University
  • Xi’an University of Architecture & Technology
  • Yale University
Education: Universities
  • Cork Institute of Technology (Ireland)

Many thanks, we are most happy with the instruments, software, etc. The students enjoy working with these kits.

Prof. Eamonn Butler
Dept. of Applied Physics and Instrumentation 

  • Alabama Power Co
  • Bechtel
  • BP Exploration
  • British Gas Tunisia
  • Chevron
  • Dominion Virginia Power
  • Exxon Mobil
  • Gulf Oil
  • Manitoba Hydro
  • Planergy International
  • Petrobras Engergia (Argentina)
  • Petrochina Int’l
  • Petroecuador (EPPE)
  • PSE&G
  • Qatar Petroleum
  • Shell
  • Sunoco
  • Taipower
  • Westinghouse Savannah River Co
  • Zueitina Oil Co
  • We have been using GrayWolf Instrument for quite some time now, and personally I have never thought of a better way to use it in terms of ease and usefulness. If being graded (out of five) I’ll give it a 5.5. Thanks GrayWolf.
    Hj Alias
    Negara Brunei Darussalam 
  • AMEC Earth & Environmental
  • ATC Associates
  • Bureau Veritas
  • Healthy Buildings International
  • Hillman Environmental
  • Johnson Matthey
  • LFR Levine Fricke
  • Professional Environmental
  • SAIC
  • S-F Analytical Labs
  • TetraTech
  • TRC Environmental
  • Trow Consulting Engineers
  • URS Corporation
  • Weston Solutions

Everything about the [GrayWolf model IQ-410] probe and software have been perfect and within my expectations. It is easy to use and has all of the answers. The product has been great, the data logging software seems flawless, and customer service is unmatched. I have researched other similar products for a couple of years, very good in their own right, but, in my opinion, the value and application have exceeded any expectations an Industrial Hygienist could have.

Mark Hlebichuk 

Facility Management
  • Baltimore Museum of Art
  • Bibliotèque Nationale de France
  • Chevron Real Estate Management
  • Cushman & Wakefield
  • Foxwoods Resort Casino
  • GSA Denver
  • Hines Interests
  • J Paul Getty Museum
  • MGM Grand Macau
  • Museum of London
  • Nalco
  • Oxford Properties
  • Petronas Towers (Malaysia)
  • Panama Canal Authority
  • Sodexho Marriott


  • Buffalo Bill Center of the West
    Got my new (upgraded) stuff today-WOOT! I’m just familiarizing myself with it now but right away I’m feeling warm and fuzzy!
    Thanks for the help and tell everybody over there “Well done! The customer is satisfied!”
    Phil Anthony
    Operating Engineer


  • Australian Dept of Agriculture & Food
  • Belgian Ministry of Internal Affairs
  • Cherokee Nation
  • DDASS de Sainte Pierre et Miquelon (France)
  • Dubai Environmental Municipality
  • Finnish Institute of Occupational Health
  • German Umweltbundesamt (UBA), IAQ Div.
  • Independence National Historical Park
  • International Monetary Fund
  • Kenya Bureau of Standards
  • Ministry of Labour & Social Security (Jamaica)
  • Navajo OSHA
  • New Zealand Dept of Geological Svcs
  • Swedish Ministry of Occupational Health
  • Supreme Council for Environment (Bahrain)
  • United Nations Global Service Center
  • US Occupational Safety and Health Administration (OSHA). GrayWolf’s AdvancedSense BE is the recommended product for OSHA field offices performing IAQ surveys.
  • US Embassy, Beijing
  • US Embassy, Jeddah
  • US Embassy, Budapest
  • US Environmental Protection Agency (USEPA)
  • US National Institute of Standards & Technology (NIST)
  • US National Science Foundation
  • US Dept of Indian Affairs
  • US Dept of Energy (USDOE)
  • US Postal Service
  • US Social Security Administration
  • Vietnam Environmental Police Agency



Government: Federal
Government: Local
  • Victoria State (Australia) Dept of Environment
  • Volusia County (Florida) Health Dept
  • Sarasota County (Florida) Dept of Health
  • Palm Beach County (Florida) Risk Management
  • Pinellas County (Florida) Government
  • Lee County (Florida) Facilities Mgmt
  • Brevard Co (Florida) Board of Co Commissioners
  • Florida State Department of Health
  • St Louis County Health Dept
  • Philadelphia Suburban Water Co
  • New York City Dept of Health
  • New York City Public Library
  • NYC Dept of Correction, Riker’s Island
  • NYC Dept of Citywide Admin Services
  • City of Toronto Dept of Public Health
  • Indiana Department of Labor
  • Illinois Department of Public Health
  • Hawaii Department of Health


  • Wisconsin Dept of Health & Family Services

As an Environmental Health Specialist conducting Indoor Air Complaint surveys for a state Health Department I have the responsibility to use those resources that can assist me in helping the people I serve. The GrayWolf IAQ 410 Probe provides me with accurate, fast and easy-to-read measurements that I can report immediately to all concerned parties and to make life saving decisions on the spot if need be… GrayWolf products have been reliable, dependable and cost effective instruments. We believe in the product so much we purchased 4 additional units for our Local Health Departments.

Mark H Chamberlain
Environmental Health Specialist


  • Cedars Sinai Medical Center
  • Center for Disease Control
  • Hong Kong Sanitarium & Hospital
  • Ireland Army Community Hospital
  • Istituto Superiore di Sanita (Italy)
  • Jiangsu CDC
  • Lancaster General Hospital
  • Mayo Clinic
  • Naval Hospital, Camp Pendelton
  • Occuhealth
  • Tufts Health Plan
  • UCLA Healthcare
  • US Naval Hospital, Spain
  • Veterans Admin Medical Center, New Orleans
  • Washington Adventist Hospital
  • Weill Cornell Medical College
  • William Beaumont Army Medical Center
  • Kingston General Hospital Allergy Research.

Allergy research brings with it the necessity for accurate air quality monitoring. Our new GrayWolf DirectSense IAQ monitor was a welcomed addition to our research equipment and has proven to be extremely easy to use. Since the purchase I have nothing but praise for the quality of the equipment, ease of use of the software, and the unparalleled customer service that has been provided since our acquisition.

Terry Walker
Environmental Exposure Unit
Kingston General Hospital Allergy Research


Homeland Defense
  • California Army National Guard
  • Canadian Royal Mounted Police
  • Dubai Police
  • Edmonton Police Service
  • Federal Air Marshall Service
  • FDNY OSHA Unit
  • Indiana Air National Guard
  • Ministry of Defence, Royal Navy (UK)
  • Minnesota Air National Guard
  • Mississippi Air National Guard
  • New Jersey Air National Guard
  • Oklahoma National Guard
  • Texas Army National Guard
  • US Air Force Reserve
  • US Coast Guard
  • US National Guard
  • West Virginia National Guard


  • Ohio Air National Guard, 178th Medical Group

The 178th Medical Group, Bioenvironmental Engineering Office has been using GrayWolf Products for two years now. The operation of these instruments and software has been flawless. Durability, Dependability, Portability and ease of use is unsurpassed by any of the similar pieces of equipment I have used in my 22 year career. During routine Industrial Hygiene surveys or incident responses, the GrayWolf case is the first on the truck.

SMSgt William Bice


  • Cedars Sinai Medical Center
  • Center for Disease Control
  • Hong Kong Sanitarium & Hospital
  • Ireland Army Community Hospital
  • Istituto Superiore di Sanita (Italy)
  • Jiangsu CDC
  • Lancaster General Hospital
  • Mayo Clinic
  • Naval Hospital, Camp Pendelton
  • Occuhealth
  • Tufts Health Plan
  • UCLA Healthcare
  • US Naval Hospital, Spain
  • Veterans Admin Medical Center, New Orleans
  • Washington Adventist Hospital
  • Weill Cornell Medical College
  • William Beaumont Army Medical Center
  • Aerience/Snowline

I am using GrayWolf instruments since 2011 and quite satisfied with their performance. We undertake HVAC performance optimization projects at Snowline, whereas Aerience’s role is in HVAC & Cleanroom Consultation and HVAC training. We have introduced one year skill upgradation training in HVAC. The concept is “Mastering HVAC using BIM” It’s a practical base training where we use GrayWolf IAQ instruments to understand ASHRAE 62.1.

Bipin Patil
Managing Director


  • ACCC Insurance
  • Aviva Insurance (Europe)
  • Blue Cross Blue Shield
  • Eire Insurance Group
  • EMC Insurance
  • First Non-Profit Insurance
  • Liberty Mutual
  • Manulife Financial
  • Missouri Employers Mutual
  • Trindel Insurance Fund
  • UNUM Insurance
  • Wells Fargo Insurance


  • USAA Insurance

We conduct indoor air quality surveys to investigate employees’ concern of allergy-like symptoms in the workplace. The GrayWolf Direct Sense IQ-410 probe is used to monitor a number of indoor air quality components that have a potential to cause problems.

Norma Rodriguez
Safety/Environmental Affairs Specialist

  • Cedars Sinai Medical Center
  • Center for Disease Control
  • Hong Kong Sanitarium & Hospital
  • Ireland Army Community Hospital
  • Istituto Superiore di Sanita (Italy)
  • Jiangsu CDC
  • Lancaster General Hospital
  • Mayo Clinic
  • Naval Hospital, Camp Pendelton
  • Occuhealth
  • Tufts Health Plan
  • UCLA Healthcare
  • US Naval Hospital, Spain
  • Veterans Admin Medical Center, New Orleans
  • Washington Adventist Hospital
  • Weill Cornell Medical College
  • William Beaumont Army Medical Center
In-Vitro Fertilization
  • LifeAire Systems

In addition to the performance of the GrayWolf VOC sensor, the support and training provided by GrayWolf has been exemplary. We have used the sensor in numerous settings to evaluate the TVOC load in source and recirculated air within IVF programs. The sensor and its ability to provide real-time monitoring has provided a broader understanding of the ambient air environment surrounding the in vitro culture of the human embryo.

Kathryn C. Worrilow, Ph.D.
Founder and CEO

  • Alcoa Technical Center
  • Asian Paints
  • Bose Corporation
  • Bridgestone Americas
  • Coach Leather Products
  • Canon USA
  • Colgate Palmolive
  • Corning
  • DuPont
  • Dyson
  • Energizer Battery
  • Honeywell Specialty Chemicals
  • John Deere
  • LL Bean
  • Midwest Rubber
  • Molekule
  • National Steel Company (Saudi Arabia)
  • Nissan Technical Center
  • Northstar Battery
  • Philips Consumer Lifestyle
  • Proctor & Gamble
  • Rocky Mountain Steel Mills
  • Saint Gobain
  • Xerox
  • Trelleborg Sealing Solutions

Learning to collect air quality data with the GrayWolf TG-502 [VOC] probe and downloading this data onto my PC using the WolfSense [data analysis]software was extremely easy. The TG-502 probe provides immediate, accurate and easy-to-read data. Air quality surveys can be compiled within minutes. Besides the fact that we are saving money on employing expensive contractors to do the job, we now get to know our results instantly, and we also have the freedom to sample the air quality anytime we require without wasting time waiting for the contractor’s availability. Air quality surveys have certainly been made much easier with the GrayWolf TG-502 probe.

Fiona Darmanin
EHS Manager


  • Aberdeen Proving Ground
  • Defense Supply Center, VA
  • Fort McPherson Army Base
  • Groton Naval Submarine Base
  • Malmstrom Air Force Base
  • Picatinny Arsenal
  • US Air Force 9th Medical Group
  • US Army CHPPM South
  • US Army Corps of Engineers
  • US Army, Fort Stewart
  • US Naval Public Works Center, HI
  • US Navy Sapce & Naval Weapons Ctr
  • US Navy Sub Base, WA
  • Warren Air Force Base
  • Whiteman Air Force Base
Pharmaceutical / Microbiological
  • AstraZeneca R&D
  • Bayer Health Care
  • Bristol Myers Squibb
  • China National Pharmaceutical Trade Organization
  • Glaxo Smith Kline
  • Imclone
  • Immunex/Amgen
  • Johnson & Johnson
  • L’Oreal
  • Merck & Co
  • Nova Chemicals
  • Pfizer
  • Red River Pharma
  • Schering-Plough
  • Fraser Papers
  • International Paper
  • Mead Westvaco
  • Publishers Printing
  • Royal Canadian Mint
  • RR Donnelley Print Solutions
  • US Government Printing Office
  • Graphic Impressions

I have to say that we would be lost in our print department without this equipment.
We have a “Clean Room” that we use to do all our large format printing for our vehicle wrap business.
Our room is very well ventilated, climate controlled and dust free.
However our printers and prints off gas VOC’s. We have developed a VOC capture and air quality system that keeps these levels down below 1000 parts per billion.
When part of our system get out of balance, these levels shoot up to 10,000pbb or even higher.
I would venture to say that most shops similar to ours have an environment of 50,000 to 100,000pbb without the systems that we have in place.
So regularly we go through our system and make the appropriate updates or maintenance adjustments to bring those levels down.
We would not be aware of what needs attention if we did not have this equipment.
Two huge benefits:
1. Our employee work space is safe as can be. Our print area is as safe as most office environments
2. With the controls we have in place, the VOC’s do not penetrate the adhesive of our vinyl. That means that our vehicle wraps meet or exceed [vendor] expectations for the product.
Thanks again for the great service you extend to us.

Thomas Grant

Research & Development
  • Battelle Northwest
  • Dugway Proving Grounds
  • Fred Hutchinson Cancer Research Center
  • Indian Agricultural Research Institute
  • Laboratorio Tecnologico del Uruguay
  • Lawrence Livermore Nat’l Labs
  • Lawrence Berkeley Nat’l Labs
  • Los Alamos National Labs
  • Microbe Defense
  • National Institute for Technical Physics (Romania)
  • National Science Foundation
  • Oakridge National Labs
  • Princeton Plasma Physics Lab
  • Sandia National Labs
  • Shriram Institute for Industrial Research
  • The GrayWolf Sensors are used in the University as part of PhD and MSc research projects, and are also used in the Health and Safety MSc and BSc modules. We have the IQ 610, TG 502, IQ 410, EC 202, and the FM 801 (formaldehyde). The GrayWolf IQ 610 has become popular with researchers in the last few years (Asadi et al., 2011; Pegas et al., 2011; Ramos et al., 2015, and Kar and Varshney, 2009) as it is portable, the sensor has a fast response time and the software is very intuitive to use. I would recommend getting the hard shell case as it can be locked this ensures no one can interfere with the sensor. The support team are excellent (both in Ireland and America) and always reply quickly to any query.
    Áine Broderick, PhD Researcher
    Centre for Climate & Air Pollution Studies, School of Physics, NUI, Galway
  • Analog Devices
  • IM Flash Technologies
  • Intel
  • Maxim Technology
  • National Semiconductor
  • Philips Semiconductor
  • Samsung Electronics
  • Siemens
  • Spansion
  • Texas Instruments
  • Tokyo Electron
  • Tyco Electronics
  • Western Digital
  • Alaska State Dept of Transportation
  • Bangkok Mass Transport
  • California Dept of Transportation
  • DHL Global
  • Ford Motor Company
  • Golden Gate Bridge Authority
  • London Underground
  • New Mexico Dept of Transportation
  • New York City Dept of Transportation
  • Union Pacific Railroad
  • US Dept of Transportation
  • Virginia Dept of Transportation
  • Airbus
  • Boeing Commercial Airplane Group
  • Bombardier
  • Cessna Aircraft Co
  • General Electric
  • General Dynamics
  • Hindustan Aeronautics
  • Lockheed Martin
  • North American Space Agency (NASA)
  • Northrup Grumman
  • Pratt & Whitney
  • Raytheon
  • ST Aerospace (Singapore)
  • United Technologies Research Center
  • US Federal Aviation Administration (FAA)
  • US Air Force School of Aerospace Medicine
  • Westar Aerospace


Airports & Airlines
  • Air Canada
  • American Airlines
  • Australia Pacific Airports Melbourne
  • British Airways
  • COPA Airlines
  • Dubai Airport Authority
  • Egypt Air
  • Grantley Adams Int’l Airport (Barbados)
  • Greater Orlando Airports
  • Los Angeles International Airport
  • Lufthansa
  • Metro Nashville Airport Authority
  • Metropolitan Washington DC Airports Authority
  • Qantas
  • Scandinavian Airlines System
  • Architect of the (US) Capitol
  • BAM Techniek
  • Burj Khalifa
  • Burns & McDonnell Engineering
  • Camp Dresser & McKee
  • China Vanke
  • CLI Group
  • Consigli Construction
  • Delos Living
  • Healthy Home Solutions
  • Phoenix Constructors
  • Public Works & Government Services Canada Dept. of Architecture & Engineering
  • SAAD Group
  • XI’an University of Architecture & Technology
  • Skidmore Owings & Merrill
Architecture / Construction
  • We began using the IQ-610 probe in the fall of 2008. It has surpassed our standards when using it for measuring IAQ for LEED Indoor Environmental Quality credit 3.2.
    Thomas C. Hardinge, LEED AP
    Baker Group

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