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.

Pin Pinless Moisture Meter

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Description

💧 Stay dry, stay ahead — the ultimate moisture meter for the savvy pro.

READY FOR ACTION - Includes spare pins, lanyard, and manual—plus auto diagnostic check and power-off for reliable, hassle-free use.
USER CENTRIC DESIGN - Ergonomic grip, hold function, and audible/visual alerts make monitoring effortless and professional-grade.
PRO LEVEL MOLD PREVENTION - Early detection of water leaks and dampness helps safeguard your home and family from toxic black mold.
DUAL MODE MOISTURE SENSING - Pin & pinless tech for precise, non-invasive readings—protect your surfaces while detecting hidden dampness.
COMPREHENSIVE ENVIRONMENTAL DATA - Simultaneous moisture %, ambient temperature, and humidity readings keep you ahead of mold risks.

The General Tools MMH800 Pin-Pinless Moisture Meter is a versatile 4-in-1 device designed for accurate moisture detection in wood, drywall, and concrete. Featuring dual pin and pinless sensors, it delivers quick moisture %, ambient temperature, and humidity readings with audible and visual alerts. Powered by a 9V battery with auto power-off, its ergonomic design and hold function ensure ease of use for contractors and DIYers aiming to prevent mold and water damage effectively.

Specifications

ASIN	B00563TQFG
Battery Description	9V
Best Sellers Rank	#54,054 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #20 in Moisture Meters
Brand	General Tools
Brand Name	General Tools
Customer Reviews	4.0 out of 5 stars 642 Reviews
Global Trade Identification Number	00681035014868
Included Components	General Tools MMH800 4-In-1 Combo Moisture Meter, Batteries
Item Dimensions W x H	3.63"W x 8.13"H
Item Type Name	Moisture Meter
Item Weight	2 Pounds
Manufacturer	General Tools
Model	MMH800
Mounting Type	Surface Mount
Operating Humidity	25% to 95%
Part Number	MMH800
Product Dimensions	3.63"W x 8.13"H
Smart Home Compatibility	Not Smart Home Compatible
Temperature Accuracy	±3°C
UPC	031113272343 031111204117 681035014868 031113186343
Unit Count	1.0 Count
Upper Temperature Range	130 Degrees Fahrenheit
Voltage	9 Volts
Warranty Description	1 year parts

Reviews

M**K

4.05.2024

S**R

12.01.2025

R**R

15.10.2025

T**R

23.03.2025

M**.

29.11.2024

A**R

26.08.2025

N**R

26.01.2023

D**A

8.04.2012

D**E

17.08.2021

A**R

2.07.2019

S**L

22.04.2024

S**A

22.07.2025

B**.

4.06.2023

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Pin-Pinless Moisture Meter

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