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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MMH800 Pin/Pinless Moisture Meter w/Temp and Humidity | Pin and pinless moisture meter for drywall, walls & wood. Moisture detector for house, firewood & building materials testing.

Product ID: 4539569

Details

Battery Description
9V
Brand
General Tools
Item Weight
2 Pounds
Mounting Type
Surface Mount
Product Dimensions
3.63"W x

💧5%-50% moisture range

📊Dual display + hold function

🌡️Temp & humidity sensor

803.71 DT

Duties & taxes included

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Stay ahead of mold with precision you can trust!

READY FOR ACTION - Includes spare pins, 9V battery, and lanyard—everything you need to start detecting immediately.
SMART FUNCTIONALITY - Auto power-off and hold feature save battery and let you review readings anytime.
USER CENTRIC DESIGN - Ergonomic rubber grips and lightweight build ensure comfort during extended inspections.
PRECISION MOISTURE DETECTION - Pin & pinless sensors for versatile, accurate readings across wood, drywall, and concrete.
COMPREHENSIVE ENVIRONMENTAL INSIGHT - Integrated temperature and humidity monitoring to assess mold risk with scientific accuracy.

The General Tools MMH800 is a professional-grade 4-in-1 moisture meter combining pin and pinless technology to measure moisture levels from 5% to 50% in wood and 1.5% to 33% in building materials. It features dual displays showing moisture percentage, ambient temperature, and relative humidity, with audible and visual alerts for moisture levels. Designed for comfort and efficiency, it includes auto power-off, hold function, spare pins, and a 9V battery, making it an essential tool for proactive mold detection and home safety.

Specifications

ASIN	B00563TQFG
Batteries Included?	Yes
Batteries Required?	Yes
Battery Cell Type	Alkaline
Best Sellers Rank	#48,350 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #20 in Moisture Meters
Customer Reviews	4.0 4.0 out of 5 stars (646)
Date First Available	June 28, 2011
Description Pile	9V
Included Components	General Tools MMH800 4-In-1 Combo Moisture Meter, Batteries
Is Discontinued By Manufacturer	No
Item Package Quantity	1
Item Weight	1.95 pounds
Item model number	MMH800
Manufacturer	General Tools
Material	HAWA
Measurement Accuracy	+/-0.1%
Mounting Type	Surface Mount
Number Of Pieces	5
Part Number	MMH800
Pattern	Digital Moisture Meter
Power Source	corded-electric
Product Dimensions	3.63 x 8.13 x 12 inches
Size	Pin Type or Pinless
Style	Pin Type or Pinless
Voltage	9 Volts
Warranty Description	1 year parts

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