Extech RH490 Precision Hygro-Thermometer
Extech RH490 Precision Hygro-Thermometer
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Extech RH490 Precision Hygro-Thermometer
Product Description
Product Description
The Extech RH490 Precision Hygro-Thermometer is a professional-grade moisture meter designed for water restoration specialists. It quickly measures relative humidity, dew point, wet bulb, temperature, and water vapor levels. With fast 30-second readings, data-hold function, and max/min memory, it’s the ideal humidity and temperature monitoring tool.
Our guarantee to you
Our guarantee to you
At Flood Buds, we are committed to providing you with high-quality products and exceptional customer service. We want you to be completely satisfied with your purchase, and we offer a 14-day guarantee to ensure we earn your trust. If you are not satisfied with your purchase for any reason, please contact us at customer@floodbuds.com
Get it between - and -.
I’ve been in restoration for over a decade, and this tool is a game-changer. Quick, accurate readings every time. Makes moisture checks way more efficient
Why Choose FloodBuds?
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Restoration in 24/7, So Are We
Enjoy elite service, we pick-up calls day 24/7 at (833) 356-6323
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Industry Leading Guarantee
Full refund if you're not satisfied within 14 days. Purchase truly risk-free
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Price BEAT
Found a lower price for any of our products? We will BEAT it!
Extech RH490 Quickly Measure Humidity, Air Temperature and Everything in Between
The Extech RH490 Precision Hygro-Thermometer is an essential tool for water restoration professionals who need fast, reliable, and accurate environmental readings. This high-performance hygro-thermometer and moisture meter delivers precise measurements of relative humidity (0–100%), dew point, wet bulb, air temperature (-22 to 199 °F), and water vapor levels (up to 1120 GPP or 160g/kg) within 30 seconds. Designed for demanding restoration environments, it features a data-hold function for capturing fluctuating readings and stores maximum and minimum values until cleared.
The ergonomic handheld design, complete with a carrying case and 9V battery, ensures portability and convenience on the job. Whether assessing water damage or monitoring drying progress, this professional humidity meter delivers consistent accuracy with ±2% RH and ±1.8°F temperature precision. Certified with CE and backed by a 2-year warranty, the Extech RH490 is the trusted choice for those in the restoration and environmental monitoring industry.
Avoid Mold Claims with RH490 Real-Time RH Data
✅ Rapid 30-second readings for quick assessments: Speeds up moisture inspections in water-damaged areas
✅ High-precision measurements (±2% RH, ±1.8°F): Ensures reliable humidity and temperature monitoring data
✅ Measures multiple parameters simultaneously: Captures RH, dew point, wet bulb, and vapor levels
RH490 Extech Proves Dehumidifiers Are Performing Under Control
✅ Max/min memory stores key jobsite readings: Keeps historical moisture data for project tracking.
✅ Data-hold function captures fluctuating values: Useful for unstable humidity or temperature conditions.
✅ Lightweight handheld design with carrying case: Easy to carry during water damage inspections.
What's Included in the Box?
✅ Extech RH490 Precision Hygro-Thermometer
✅ 9V Battery
✅ Carrying Case
✅ Comprehensive owner’s manual
✅ 2-year parts warranty for peace of mind
Extech RH490 Top Reviews 4.5/5 ⭐⭐⭐⭐
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Mike Tremblay
⭐⭐⭐⭐⭐
I’ve been in restoration for over a decade, and this tool is a game-changer. Quick, accurate readings every time. Makes moisture checks way more efficient -
Jaime Caldwell
⭐⭐⭐⭐
We use the RH490 on all our water damage jobs. It’s reliable, easy to carry, and gives spot-on readings. Helps us stay on schedule and on budget -
Ian McAllister
⭐⭐⭐⭐
Honestly, this is one of the best meters I’ve owned. It handles the rough conditions we work in and still delivers precise data we can trust
Frequently Asked Questions
What are the specifications?
What are the specifications?
Specifications
General Specifications
Dew Point -22 to 199 °F (-30 to 100 °C)
Relative Humidity 0 to 100%
Relative Humidity Basic Accuracy ±2%
Relative Humidity Max Resolution 0.1%
Temperature (Air) -22 to 199 °F (-30 to 100 °C)
Temperature (Air) Basic Accuracy ±1.8 °F/1 °C
Temperature (Air) Max Resolution 0.1 °F/ °C
Water Vapor 0 to 1120GPP (0 to 160g/kg)
Wet Bulb 32 to 176 °F (0 to 80 °C)
Additional Details
Certifications CE
Dimensions 7.8 × 1.7 × 1.3" (200 × 45 × 33mm)
Power 1 × 9V battery
Warranty 2 years
Weight 7oz (200g)
How long does shipping take?
How long does shipping take?
95% of orders are delivered to our customers within 5 business days
Maximum 10 business days for more remote locations
Overnight shipping is available for emergency equipment needs for an additional charge. Feel free to call us for our options at 833-356-6323.
Can I return or exchange?
Can I return or exchange?
Yes we allow returns without issue. If you are not happy with the product for whatever reason and within 14 days of purchase, we will accept the return of the product and refund your purchase
What types of payment do we accept?
What types of payment do we accept?
We accept major credit cards (Visa, Mastercard, American Express), digital wallets (Apple Pay, Google Pay, Shop Pay) and PayPal
How long does it take to be refunded?
How long does it take to be refunded?
We accept returns for a full refund if you would like to return within 14 days.
Once we receive the product back from you, we will issue the refund within 10 business days or less.
Please review our shipping and return policy for full information.
How will I be notified the product has shipped?
How will I be notified the product has shipped?
From the moment we ship your product, you will receive an email confirmation with tracking information.
What if my product arrives damaged?
What if my product arrives damaged?
Please contact us as soon as possible. We will coordinate with you to get new equipment sent. Reach out to customer@floodbuds.com
Do you have a restocking fee for returns?
Do you have a restocking fee for returns?
Flood Buds does not charge any restocking fees.
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