Extech RH390 Precision Psychrometer
Extech RH390 Precision Psychrometer
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Accurate Humidity Measurement For Water Restoration
✅ 2-Year Warranty
💯 Highly Accurate
🎯 Effective Mold-Prevention
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Extech RH390 Precision Psychrometer
Product Description
Product Description
The Extech RH390 Precision Psychrometer offers highly accurate humidity and temperature measurement for water restoration professionals. This compact, portable device measures dew point, wet bulb, and relative humidity with ±2% accuracy, helping prevent mold growth. Featuring a dual-illuminated display and 2-year warranty, it’s essential for moisture monitoring.
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 -.
This psychrometer is essential for our restoration business. The dual display is very convenient, and the accuracy has improved our drying process significantly. Highly recommend!
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
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Extech RH390 Measure Humidity and Temperature
The Extech RH390 Precision Psychrometer is an essential tool for water restoration professionals who require precise environmental monitoring. Designed to measure humidity, temperature, dew point, and wet bulb temperatures simultaneously, this handheld device ensures accurate readings with ±2% relative humidity accuracy and ±1.8°F temperature accuracy. Its dual-illuminated display allows quick switching between wet bulb, dew point, and temperature readings, making it ideal for assessing moisture levels during water damage restoration.
The RH390 covers a broad temperature range from -22°F to 199°F (-30°C to 100°C) and full-spectrum relative humidity from 0 to 100%, providing comprehensive data to help prevent mold growth and ensure proper drying. Compact and lightweight at just 7 ounces, it’s powered by a single 9V battery and comes with a protective carrying case for on-the-go use. Certified with CE and backed by a 2-year warranty, the Extech RH390 is a reliable, professional-grade moisture detection tool perfect for any water restoration project.
RH390 Helps Confirm Dry-Out Status Before Teardown Begins
✅ Accurate Humidity Measurement: ±2% relative humidity accuracy ensures reliable moisture data
✅ Comprehensive Temperature Range: Measures -22°F to 199°F for versatile site conditions
✅ Multiple Readings Display: Simultaneously view dew point, wet bulb, and temperature for thorough analysis
RH390 Extech Stops Call-Backs By Proving Job Is Done
✅ Lightweight and Compact: Weighs only 7 ounces, ideal for field use
✅ Long Battery Life: Powered by a single 9V battery for extended operation
✅ Protective Carrying Case: Includes durable case to safeguard device during transport
What's Included in the Box?
✅ Precision Psychrometer Meter
✅ Carrying Case
✅ 9V Battery
✅ Comprehensive owner’s manual
✅ 2-year parts warranty for peace of mind
Extech RH390 Top Reviews 4.4/5 ⭐⭐⭐⭐
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Lisa Whitman
⭐⭐⭐⭐⭐
This psychrometer is essential for our restoration business. The dual display is very convenient, and the accuracy has improved our drying process significantly. Highly recommend! -
Ryan Caldwell
⭐⭐⭐⭐
Compact and precise, the RH390 is perfect for on-site moisture checks. Battery life is solid, and the 2-year warranty gives peace of mind. Great investment for pros! -
Ryan McAllister
⭐⭐⭐⭐
The Extech RH390 is a reliable tool for my water restoration jobs. Accurate readings and easy to carry. Helps me monitor moisture and prevent mold effectively
Frequently Asked Questions
What are the specifications?
What are the specifications?
General Specifications:
Dew Point: -22 to 199 °F (-30 to 100 °C)
Relative Humidity: 0 to 100%
Temperature (Air): -22 to 199 °F (-30 to 100 °C)
Wet Bulb: 32 to 176 °F (0 to 80 °C)
Accuracy & Resolution:
Relative Humidity Accuracy: ±2% between 20% and 90% RH
Temperature Accuracy: ±1.8 °F (1 °C)
Resolution: 0.1% RH, 0.1 °F/°C
Physical & Power Details:
Dimensions: 7.8 × 1.7 × 1.3 inches (200 × 45 × 33 mm)
Weight: 7 oz (200 g)
Power: 1 × 9V battery
Warranty: 2 years
Certifications: CE
How long does shipping take?
How long does shipping take?
Shipping will range from 1-10 business days depending on your location
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 with 14 days of purchase, we will pay the shipping to return the product to us 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?
If you would like to return within 14days. Just email or call us, we will pay for your return shipping of the product to us. Once we receive it back we will issue the refund within 24 hours.
Do you ship outside of Canada?
Do you ship outside of Canada?
shipping times may be slightly longer.
Outside of Canada and USA will be subject to additional shipping costs, please contact at customer@floodbuds.com before placing an order, especially for overseas.
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 pay for your return shipping and have another product shipped to you!
Do you have a restocking fee for returns?
Do you have a restocking fee for returns?
We do not believe in restocking fees and will never charge our customers for this!