Description
Product Overview
The General Tools Digital Moisture Meter (Model MMD4E) is a precision instrument designed for detecting moisture levels in various materials, including wood, drywall, and concrete. It features a gray plastic housing with product dimensions of 9.5 inches wide by 1.4 inches high, and it operates on a 9-volt alkaline battery (included). This meter provides accurate moisture readings with a range of 5-50% for wood and 1.5-33% for building materials, ensuring reliable data for preventing mold and water damage. The device includes extra 8mm stainless steel pins and a protective cap that also serves as a calibration checker, making it a versatile tool for both amateur and professional use.

Usage
This moisture meter is ideal for indoor environments where moisture detection is critical, such as homes, offices, and construction sites. It is commonly used by DIY enthusiasts and professionals to test suspicious water stains, check humidity levels in walls, and assess the need for remediation to prevent harmful mold growth. The tool’s broad temperature range, from 32°F to 60°C, allows for reliable performance in various conditions, making it suitable for regular inspections and emergency water leak detection.
Why Choose Us
General Tools is a recognized leader in precision instrument design, dedicated to delivering exceptional customer service and reliable products. This moisture meter stands out due to its high accuracy (within ±3°F), backlit LCD for easy reading, and included accessories like extra pins and a calibration cap. The brand’s commitment to quality ensures that users can work smarter and measure better, with tools that are built to last and provide consistent results in demanding environments.
Key Features
- Backlit LCD with large 0.3-inch digits for clear visibility in low light
- Stainless steel pins for precise penetration into wood and building materials
- Broad moisture range: 5-50% for wood and 1.5-33% for concrete and drywall
- Visual and audible alerts to signal critical moisture levels quickly
- Includes batteries, extra pins, and a protective cap for calibration and storage
FAQ
What materials can this moisture meter test?
It is designed for wood, drywall, concrete, and other building materials, with specific ranges for accurate moisture detection.
How do I calibrate the device?
Use the included protective cap as a calibration checker to ensure accurate readings before each use.
Is the battery included?
Yes, a 9-volt alkaline battery is included, and it is required for operation.
Can it be used outdoors?
It is intended for indoor use, as specified in the product details, to maintain accuracy and durability.
What is the temperature accuracy?
The temperature reading accuracy is within ±3 degrees Fahrenheit, providing reliable data for various conditions.




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