



GANN Hydromette BL H 40 - Accurate wood moisture detection
The Hydromette BL H 40 wood moisture meter is a professional-grade tool designed for water damage restoration specialists who demand precision and reliability. Engineered with a high-quality resistance-based measuring amplifier, it provides accurate moisture readings up to 40% in sawn timber (up to 180 mm thick), veneers, and chipboards. The device features automatic and manual temperature compensation, ensuring precise results even in fluctuating environments—a critical need for water restoration professionals dealing with structural drying and moisture mapping.
With 7-level wood species correction covering over 300 wood types, a large digital display, and Min/Max/Hold memory functions, it's perfect for both spot checks and serial measurements. The device also stores the five most recent readings and supports customer-specific calibration curves for advanced applications. Compact, lightweight, and battery-powered, the Hydromette BL H 40 offers fast, reliable performance for any restoration job site, helping prevent mold growth and structural damage with confidence and speed.
Hydromette BL H 40 | Prevent Paint Failures with Accurate Wood Moisture Testing

BL H40 Hydromette Checks Wood Quickly, Prevent Costly Tear-Outs Later
✅ High-precision wood moisture readings up to 40%: Ensures reliable assessments for water-damaged wood materials
✅ Automatic temperature compensation improves measurement accuracy: Adapts readings based on surface or ambient temperature
✅ Species correction for over 300 wood types: Provides precise results across diverse restoration projects

Use BL H 40 Hydromette GANN On Trim And Studs, Prove Structural Dryness
✅ Fast single and series moisture measurements: Speeds up inspection time for large-scale jobs
✅ Min/Max/Hold functions for reliable documentation: Retain critical data for client reports and insurance
✅ Compact, portable, and battery-operated design: Ideal for on-site water damage evaluations

What's Included in the Box?
✅ Hydromette BL H 40 Device
✅ 9V Battery
✅ Wood Species Correction Table
✅ Plastic Storage Box
✅ Comprehensive owner’s manual
✅ 1-year parts warranty for peace of mind
HydrometteBL H 40 Top Reviews 4.5/5 ⭐⭐⭐⭐
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Mark Thompson
⭐⭐⭐⭐⭐
This moisture meter is a real lifesaver on the job. It gives quick, accurate readings every time. Super easy to use and tough enough for daily work in restoration -
Jessica Lee
⭐⭐⭐⭐
As a business owner, I rely on this tool constantly. The temperature adjustment and wood species settings make my moisture checks spot-on. It’s made my work a lot easier -
Ryan McAllister
⭐⭐⭐⭐
I use this meter on every water damage job. The readings are fast and clear, which saves me a ton of time. Definitely a must-have for anyone in restoration
Frequently Asked Questions
What are the specifications?
What are the specifications?
Specifications
Handy moisture measuring meter for fast single and series measurements with high-quality measuring amplifier
Direct readout of wood moisture in % on the large LCD display, resolution: 0.1 %
7-level wood species correction for more than 300 types of wood
Wood temperature compensation is done manually or automatically via the device/ambient temperature in the range from -10 to 40 °C
Min, Max and Hold functions for measured values
Storage of the 5 most recent measured values
Optional: 2 customer-specific characteristic curves may be programmed in factory
Power supply: a 9-volt battery is included
Length 0.175 m
Width 0.05 m
Height 0.03 m
Weight 0.16 kg
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.
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!