1-203-402-0477 [email protected]

(building on 25 years of experience):

Updated DirectSense® II Probe Brochure

Up to 8 smart sensors

GrayWolf DSII Brochure

Choose a gratis smart sensor (“truly” smart) with any DSII-8 probe based IAQ, TOX or Core Kit purchased now through the end of 2023. Kits come with various sensors from the 25+ that GrayWolf offers. However, choose from either NO2, NO, SO2, H2S, or O2 as your free additional smart sensor.

Updated AdvancedSense® XM Brochure; GrayWolf’s newly introduced Meter

AdvancedSenseXM Environmental test Meter

Particle Meters

WolfRadio™ XM modules particle meters

WolfRadio™ XM modules at half price, when purchased with a Particle meter, thru year-end. Save while enabling the connectivity (Bluetooth to your smartphone or other devices via free Android/iOS apps and Wi-Fi to the cloud via GrayWolfLive®) for these highly accurate, reliable 6-channel meters.

Rugged Platforms (Android Handheld/Windows Tablet)

AdvancedSenseXM Environmental test Meter

Software upgrades are now always at no charge. And, yes, even these lower cost kits, with DSII-8, are available thru December 31st, 2023 with a free smart sensor from the choice of NO2, NO, SO2, H2S, or O2.


GrayWolf’s Cloud based data-logging and remote access, with optional Alerts, utilizing secure Azure servers. Get a 2-year subscription for the price of one when purchased by end December, 2023.

Air Velocity

AS-202A for the price of the AS-201 now to year-end 2023. Adds the articulating tip to the telescoping shaft of these patented, exceptionally accurate thermal “hotwire” airspeed probes.

Differential Pressure (DP)

Half price off any DP sensor ordered with an AdvancedSense XM meter now or until the end of 2023. While Barometric Pressure (BP) comes as standard, the optional DP sensors also install in the AdvancedSense XM. Exceptional low-end accuracy (auto-zeroing), yet wide range (auto-ranging dual sensors) for IAQ, HVAC and pitot tube air velocity applications.



Check out the range of accessories, from security cases to tripods to calibration kits and much more, available to support your GrayWolf instrumentation.

Application Notes: Validating Low-Cost IAQ Sensors


Check our broad range of App Notes on our website. And keep an eye out as several more are in the process of being updated, and new App Notes added.

Come see us at these upcoming Tradeshows

AIOH 2023
Australian Institute of Occupational Hygienists, Crown Promenade
Southbank, Victoria, Australia
AES Booth Numbers 43 – 48
December 04, 2023 – December 06, 2023

AIOH 2023

AIHce – American Industrial Hygiene Conference & Expo
Greater Columbus Convention Center, Columbus, OH
Booth #1209
May 20, 2024 – May 22, 2024

AIOH 2023

Indoor Air 2024
Hawai’i Convention Center, Honolulu, Hawaii
Booth #TBD
July 7, 2024 – July 11, 2024

AIOH 2023

For Detailed Information: