Does it have masonry setting?

The MMH800 is designed for use in woodworking, water damage restoration, building construction and home renovation. Examples include: • Checking for moisture on or below the surface of carpets • Measuring the surface moisture and/or moisture content of wood, drywall or concrete before painting, wallpapering, sealing or treating.

What's the probe length? Are they insulated or replaceable?

As far as i can tell the probes are about 3/8 long. The are metal, and have a plastic cover to protect them and you when not in use. The cap can also be flipped over once taken off, to help check device itself, for calibration. They are replaceable. They actually come with an extra set of pins (probes). Hope this helps.

Will this work for firewood?

you are going to get a reading to the depth of the prongs about a third of an inch.

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General Tools 4-In-1 Pin/Pinless Combo Moisture Meter #mmh800 - Pin/Pinless Combo Mold Detector For Home - Dual Lcd Display & Audible Alarm

Product ID: 266500528

Details

Battery description
9 volt battery
Brand
General Tools
Item weight
1.95 Pounds
Mounting type
Freestanding
Product dimensions
20.7W x 30.5H

💧Pin & pinless moisture detection

📊Dual LCD moisture & humidity readout

🔔Audible alarm for moisture alerts

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Description

💧 Detect moisture before it detects you – stay mold-free and stress-free!

DUAL LCD DISPLAY - Simultaneously monitor moisture percentage, ambient temperature, and relative humidity with crystal-clear visibility.
SMART AUDIBLE ALERTS - Stay ahead of mold risks with customizable sound alarms signaling high, medium, or low moisture levels.
USER FRIENDLY DESIGN - Freestanding, lightweight, and powered by a 9V battery for on-the-go diagnostics and effortless home maintenance.
PRECISION MOISTURE DETECTION - Pin and pinless sensors deliver accurate readings on wood, walls, and floors for early mold prevention.
VERSATILE 4 IN 1 FUNCTIONALITY - Combines humidity sensing, water leak detection, and mold testing in one sleek, professional-grade tool.

The General Tools MMH800 is a professional 4-in-1 moisture meter featuring both pin and pinless sensors, dual LCD displays for moisture and humidity, and an audible alarm system. Designed for precise detection of dampness in wood, walls, and floors, it empowers homeowners and pros alike to prevent mold growth effectively. Compact and battery-powered, it’s a must-have for smart, proactive home maintenance.

Specifications

ASIN	B00563TQFG
ASIN	B00563TQFG
Battery Description	9 volt battery
Best Sellers Rank	#12,292 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #10 in Moisture Meters
Brand Name	General Tools
Country Of Origin	China
Country of origin	China
Customer Reviews	4.0 4.0 out of 5 stars (630)
Customer reviews	4.0 4.0 out of 5 stars (630)
Date First Available	31 August 2012
Global Trade Identification Number	00681035014868
Included Components	General Tools MMH800 4-In-1 Combo Moisture Meter, Batteries
Is Discontinued By Manufacturer	No
Item Dimensions W x H	20.7W x 30.5H centimeters
Item Type Name	Moisture Meter
Item Weight	1.95 Pounds
Item model number	MMH800
Manufacturer	General Tools
Manufacturer	General Tools
Model	MMH800
Mounting Type	Freestanding
Operating Humidity	25% to 95%
Part Number	MMH800
Product Dimensions	9.22 x 20.65 x 30.48 cm; 884.51 g
Temperature Accuracy	±3°C
UPC	031113272343 031111204117 681035014868 031113186343
Unit Count	1 Count
Upper Temperature Range	130 Degrees Fahrenheit
Voltage	9 Volts

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