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Klein Tools ET140 Pinless Moisture Meter for Drywall, Masonry and Wood
Pinless — no holes Senses up to 0.75 in deep

Official product photos: Klein Tools · source More photos on Amazon

Best pinless moisture meter Klein Tools · Measuring Tools

Klein Tools ET140 Pinless Moisture Meter for Drywall, Masonry and Wood

Check walls, floors and lumber for hidden moisture without making a single hole — scan, read, and see the level on a nine-LED bar.

RightScore Score pending
Best for Home repairs DIY projects Professional jobs

Amazon

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  • Pinless — no holes
  • Senses up to 0.75 in deep
  • 4 material settings

At a glance

Our verdict

—

A fast, non-destructive way for homeowners, inspectors and contractors to trace leaks and check materials before painting or flooring. The trade-off: pinless readings are relative and less precise (±4%) than a pin meter for exact...

RightScore appears once live prices from licensed store feeds are connected — we never guess a number.

Read the full verdict

0.1%

Resolution

7 oz

Weight

Best for

  • Home repairs
  • DIY projects
  • Professional jobs

Best thing: Non-destructive scanning

Honest catch: ±4% accuracy; relative readings

Our verdict

A fast, non-destructive way for homeowners, inspectors and contractors to trace leaks and check materials before painting or flooring. The trade-off: pinless readings are relative and less precise (±4%) than a pin meter for exact wood moisture content, and only four material settings are calibrated.
RightDeals research · checked 12 Oct 2026
A stain on the ceiling, a soft spot by the tub, a basement after heavy rain: a moisture meter tells you how far the water has spread. Klein's ET140 uses an electromagnetic sensor instead of pins, so you can slide it across painted drywall, plaster, masonry and wood without marking the surface. It reads 0 to 100% relative moisture with 0.1% resolution and ±4% accuracy, senses up to 0.75 in deep, and has settings for drywall, masonry, hardwood and softwood. A bright display with a nine-LED bar graph, an audible alert, a hold function and auto power-off make quick work of scanning a room. A 9V battery is included.

Why you’ll like it

  1. 01

    Trace a leak across a wall or ceiling without damaging paint or drywall.

  2. 02

    Check that drywall, concrete or wood is dry enough before painting, tiling or flooring.

  3. 03

    The LED bar and audible alert show wet spots at a glance while you scan.

  4. 04

    Survives 6.6 ft drops, so it can live in a toolbag.

Great for

  • Homeowners tracking leaks
  • Painters, flooring and drywall installers
  • Home inspectors

Maybe skip it if

  • You need precise moisture content for firewood or woodworking lumber (a pin meter suits better)

Where it shines

How well it suits each use, based on its specifications.

  • Home repairs Great
  • DIY projects Great
  • Professional jobs Good

Pros & cons

Pros

  • Non-destructive scanning
  • Hold and auto power-off
  • Battery included
  • Compact, 7 oz

Cons

  • ±4% accuracy; relative readings
  • Calibrated for four materials only

Based on the maker’s specifications and published information — every point is checked against a named source.

Where to buy

Stores we link to in US. We show a price only when it is live.

Prices for United States in USD
Amazon

Amazon

Amazon shows the live price and stock

Live price on Amazon

Prices change often, so we send you to Amazon for the current one instead of showing an old price.

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We may earn a commission when you buy through our links. It never changes how we rank products. How we make money

More stores and live prices are added automatically as we connect store feeds.

Specifications

General

Sensing method
Pinless, electromagnetic field (EMF) sensor

Battery

Battery
1 x 9V (included), auto power-off

Design

Drop protection
6.6 ft (2 m)

Display

Resolution
0.1%
Display
Reverse-contrast display, nine-LED bar graph, audible alert

Features

Material settings
Drywall, masonry, hardwood, softwood

Performance

Reading range
0–100% (relative)
Accuracy
±4%
Sensing depth
0.75 in (1.9 cm)

Size & weight

Weight
7 oz

Source: RightDeals research · verified 2026-10-12

Our score is on its way

We publish it only once enough real data is in — see how we rank products.

How We Rank Products

What buyers say

We only show star ratings we are licensed to display. Read verified buyer reviews and photos directly on Amazon.

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Questions people ask

Does it leave marks on walls?

No. It is pinless and reads through the surface with an electromagnetic sensor, so nothing pierces the material.

Which materials is it calibrated for?

Drywall, masonry, hardwood and softwood, selected with the mode button. Klein notes it is calibrated for these materials only.

Sources & method

Researched from the maker’s specifications, the store listing and published information — not lab-tested. We never accept payment for a recommendation.

How We Rank Products · Editorial policy

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