---
product_id: 4539569
title: "General Tools MMH800 Pin/Pinless Moisture Meter w/Temp and Humidity"
brand: "general tools"
price: "S/.998"
currency: PEN
in_stock: true
reviews_count: 8
url: https://www.desertcart.pe/products/4539569-general-tools-mmh800-pin-pinless-moisture-meter-w-temp-humidity
store_origin: PE
region: Peru
---

# Pin & pinless moisture detection Dual display: moisture & humidity Accurate temp ±3°C General Tools MMH800 Pin/Pinless Moisture Meter w/Temp and Humidity

**Brand:** general tools
**Price:** S/.998
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** General Tools MMH800 Pin/Pinless Moisture Meter w/Temp and Humidity by general tools
- **How much does it cost?** S/.998 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/4539569-general-tools-mmh800-pin-pinless-moisture-meter-w-temp-humidity)

## 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

- • **Instant Alerts:** Audible and visual indicators for high, medium, and low moisture levels
- • **Compact & Portable:** Lightweight 2-pound design fits perfectly in your toolkit or on-site bag
- • **Dual-Mode Moisture Sensing:** Pin and pinless sensors for precise readings on any surface
- • **Trusted Professional Grade:** Backed by General Tools’ legacy of precision and reliability
- • **Comprehensive Environmental Monitoring:** Simultaneously tracks moisture %, ambient temperature, and relative humidity

## Overview

The General Tools MMH800 is a professional-grade 4-in-1 moisture meter featuring both pin and pinless sensors, dual displays for moisture percentage, temperature, and humidity, plus audible/visual alerts. Compact and accurate (±0.1% moisture, ±3°C temp), it empowers managers and DIY pros to detect water damage early and prevent mold growth effectively.

## 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 |
|---------------|-------|
| Brand | General Tools |
| Product Dimensions | 3.63"W x 8.13"H |
| Item Weight | 2 Pounds |
| Battery Description | 9V |
| Mounting Type | Surface Mount |
| Upper Temperature Rating | 130 Degrees Fahrenheit |
| Voltage | 9 Volts |
| Temperature Accuracy | ±3°C |
| Manufacturer | General Tools |
| UPC | 031113272343 031111204117 681035014868 031113186343 |
| Global Trade Identification Number | 00681035014868 |
| Part Number | MMH800 |
| Item Weight | 2 pounds |
| Item model number | MMH800 |
| Is Discontinued By Manufacturer | No |
| Size | Pin Type or Pinless |
| Style | Pin Type or Pinless |
| Material | HAWA |
| Pattern | Digital Moisture Meter |
| Power Source | Corded-electric |
| Item Package Quantity | 1 |
| Number Of Pieces | 5 |
| Measurement Accuracy | +/-0.1% |
| Included Components | General Tools MMH800 4-In-1 Combo Moisture Meter, Batteries |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Description Pile | 9V |
| Warranty Description | 1 year parts |

## Product Details

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

## Images

![General Tools MMH800 Pin/Pinless Moisture Meter w/Temp and Humidity - Image 1](https://m.media-amazon.com/images/I/618gkm-K00L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Reasonably Reliable Tool
*by M***K on May 4, 2024*

I'm a general contractor and I find myself occasionally having to test for moisture in a client's home. This is my second General Tool moisture meter. This model - the MMH800 - has more functions then my previous one including the ability to test for moisture as well as providing a temperature readout. The meter is a dual-function pin and pin-less model which allows testing without leaving holes in walls or woodwork.I had the opportunity to be on a customer site with a mold remediation tech who was taking moisture readings to determine possible wet areas that might have been contributing to a mold issue. The tech didn't tell me the model he was using other than it was a professional -series, scan-only type and that it was very accurate with a good scan depth. When I compared my readings from the MMH800 with the tech's meter I found very little differences in the readings.There is one inherent limiting factor with all pin meters and that is they only test to the depth of the pins, useful on drywall or wood but very limited on masonry and/or concrete. Concrete testing is virtually unreliable due to the penetration issue. The ability to take a scan reading alleviates some of that issue.What I like most about the MMH800 is that is reasonably accurate and affordable. Adding a moisture meter (along with a good gas sniffer) to my tool bag provides data which ultimately allows me to better serve my customers.

### ⭐⭐⭐⭐⭐ Good mid-level meter
*by M***. on November 29, 2024*

This is a solid performing meter a step above the baseline meters plus it has a built-in display for temperature and humidity which is handy especially when measure moisture in attics and crawlspaces.

### ⭐⭐⭐⭐ Functionality
*by S***R on January 12, 2025*

Have purchased this before but returned it last time as I couldn't get the calibration process to work or it was malfunctioning. This time I realized using the longer pins that I cannot put the cap back on. This kind of defeats the purpose in addition to only having it 6 months or less and the calibration does not appear to be working for either the wood or bldg materials range. Will be reaching out to warranty dept. Been tough finding a good moisture meter that lasts.

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*Product available on Desertcart Peru*
*Store origin: PE*
*Last updated: 2026-02-10*