---
product_id: 4539569
title: "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."
brand: "general tools"
price: "R4137"
currency: ZAR
in_stock: true
category: "General Tools"
url: https://www.desertcart.co.za/products/4539569-mmh800-pin-pinless-moisture-meter-w-temp-and-humidity-pin
store_origin: ZA
region: South Africa
---

# 5%-50% moisture range Dual display + hold function Temp & humidity sensor 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.

**Brand:** general tools
**Price:** R4137
**Availability:** ✅ In Stock

## Summary

> 💧 Stay ahead of mold with precision you can trust!

## Quick Answers

- **What is this?** 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. by general tools
- **How much does it cost?** R4137 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/4539569-mmh800-pin-pinless-moisture-meter-w-temp-and-humidity-pin)

## Best For

- general tools enthusiasts

## Why This Product

- Trusted general tools brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **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.

## Overview

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.

## Description

You can count on our General Tools 4-in-1 Digital Moisture Meter to give you the most accurate readings when it comes to tracking down pesky mold in your home. Our humidity tester provides a moisture level range of 5% - 50% in wood and 1.5% - 33% in building materials, such as concrete and drywall. It has an auto diagnostic check and auto power off after 3 minutes and includes a solid 9-volt battery. The gauge also comes with a lanyard, 2 sets of spare pins, and a user's manual. The sturdy, ergonomic shape and rubber side grips allow for comfort even when using for multiple measurements. Every mold detector has a hold function, saving a read to view later. At General Tools, we offer over 1,000 products to choose from. We're proud to provide merchants, artisans, and DIYers worldwide with a broad range of affordable, specific-purpose mechanical hand tools and precision measuring and inspection gear.

## Features

- HUMIDITY SENSOR: Our combo meter tool can quickly determine what level of remediation is needed to keep your family safe from black mold. High levels of dampness that go untreated are the leading cause of harmful fungus growth in the home.
- WATER LEAK DETECTOR: Finding the moisture content in your floors, plastered walls, and wood is the first step in early prevention. Continuously check and test suspicious water stains around the house so you can determine if the area is wet or dry.
- MOISTURE READER: The mold test features 2 dedicated displays, moisture percentage, ambient temperature, and relative humidity. Our mildew scanner includes audible and visual indications of high, medium, and low moisture levels with a °F/°C switch.
- MOLD TESTER: This tool features both pin-type and pinless (flat pad) surface sensors for an accurate test read on larger areas. Once moisture patches are detected, flip open the cap to expose the pin sensors for more exact content readings.
- GENERAL TOOLS: We're a recognized leader in designing and developing specialized precision tools dedicated to delivering exceptional customer service. We encourage artisans and DIYers to work smarter, measure better, and repair more productively.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| 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 |

## Product Details

- **Battery Description:** 9V
- **Brand:** General Tools
- **Item Weight:** 2 Pounds
- **Mounting Type:** Surface Mount
- **Product Dimensions:** 3.63"W x 8.13"H

## Images

![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. - Image 1](https://m.media-amazon.com/images/I/618gkm-K00L.jpg)

## Available Options

This product comes in different **Pattern** options.

## Questions & Answers

**Q: Does it have masonry setting?**
A: 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.

**Q: What's the probe length? Are they insulated or replaceable?**
A: 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.

**Q: What is the second opening in the case for? What is it meant to hold?**
A: Battery

**Q: Will this work for firewood?**
A: you are going to get a reading to the depth of the prongs about a third of an inch.

## Frequently Bought Together

- General Tools MMH800 Pin/Pinless Moisture Meter w/Temp and Humidity
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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-08-03*