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Features

Brand	Metrinco
Producer Code (MPN)	M120B
Purpose of the device	Wood moisture meter, Moisture meter for building materials
The principle of measurement	Dielcometric (non-destructive)
Moisture measurement range	0–30% (wood); 0–17.9% (building materials, depending on the group)
Accuracy	±1,0%
Scanning depth (mm)	100
Available menu languages	Ukrainian, English
Power supply	AAA batteries (3 pcs.)
Country of origin	Ukraine
Delivery set	Instrument in a reinforced protective cover, plastic carrying and storage case, user manual, batteries. For export shipments outside Ukraine, the instrument may be supplied without batteries.
Warranty period, month	24

Professional Moisture Meter for Building Materials and Wood METRINCO M120B

SKU 2590

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€260

METRINCO M120B Building Material & Wood Moisture Meter

The M120B is a professional non-destructive moisture meter for building materials and wood. Designed for screed and plaster drying control, acceptance of construction work, and locating areas of elevated moisture in walls and floors. Dielectric (capacitive) method, scanning depth up to 100 mm, 21 calibration groups for building materials plus 2 wood groups. Measurement requires no pins and leaves no marks on the material.

Key advantages

Three spring-loaded stainless steel electrodes. They conform to surface irregularities on their own — consistent fit against brick, plaster and rough-sawn timber.
Scanning depth up to 100 mm. Assesses moisture within the bulk of screed, concrete and other materials, not just the surface layer. Effective depth depends on the material's density, moisture and structure.
21 calibration groups for building materials. Dedicated calibrations for aerated concrete D300–D600, cement-sand screed, concrete grades M200–M400, sand-lime and clay brick, fibre cement, natural stone.
Material groups spelled out in full. "Cement screed, cement mortar (2000 kg/m3)" instead of cryptic codes — scrolls in the status line, shown in full in the selection menu.
Honest over-range indication. Wet material shows a blinking ">limit" instead of a made-up number; as the material dries, the transition from over-range indication to a numeric reading is stable, with no toggling between modes at the range limit.
Rugged bumper case, large 128×64 backlit display, HOLD. Runs on 3×AAA, auto power-off after 5 min.

Specifications

Measurement method	dielectric (capacitive), non-destructive
Material groups	23 (21 building + 2 wood)
Range, building materials	0 – upper limit of the group (up to 17.9 %)
Range, wood	0 – 30 % (above 20 % indicative)
Accuracy	±1 %
Resolution	0.1 %
Scanning depth	up to 100 mm (depends on material density and moisture)
Sensor	3 spring electrodes, stainless steel
Display	graphic 128×64, backlit
Power	3 × AAA (1.5 V)
Auto power-off	5 min
Operating temperature	0…+60 °C
Made in	Ukraine

Material groups

Plaster and self-levelling floors · cement-sand screed and cement mortar · aerated concrete D300–D600+ · fibre cement (eternit) · lightweight concrete 1900–2000 kg/m³ · concrete M200–M400 · sand-lime brick · lime mortar · sandstone, limestone · clay brick, porous and dense · ceramics, tiles · marble · softwood (pine, spruce) and hardwood (oak, beech).

Who it is for

Builders and site managers — checking screed readiness before flooring, accepting plastering work. Building surveyors — mapping damp areas on walls and floors by scanning. Roofers and carpenters — verifying structural timber before installation.

For woodworking and kiln-drying control, see METRINCO M120W — with wood groups by density.

FAQ

What is the difference between M120B and M120W?
M120B is the building version: 21 material groups, 2 wood groups, 100 mm depth. M120W is the woodworking version: wood groups by density, shallower depth. For screed, concrete and brick, choose M120B.

Does it damage the surface?
No. The method is non-destructive: the electrodes press against the surface without piercing or marking it.

Can I measure freshly poured screed?
Yes — that is the main use case. While the screed is wet the meter shows over-range; once it dries down to the limit it switches to numeric readings, which then fall towards the levels acceptable for the specific follow-on work.

Does rebar affect the reading?
Yes, metal within the scanning depth raises the result. On reinforced structures measure at several points between bars and rely on the lowest value.

What is the minimum material thickness?
Ideally 100 mm or more — otherwise the field "sees" whatever is beneath the sample. Stack thin samples without air gaps.

Why is wood limited to 30 %?
Above fibre saturation the accuracy of absolute moisture determination by the dielectric method drops significantly. For structural timber (12–20 % target) the range is more than sufficient; anything above 30 % needs drying anyway.

Choosing the material group

Cement-sand screed (wet or semi-dry), cement mortar — group 2.
Gypsum and anhydrite self-levelling floors, plaster — group 1.
Concrete of known grade — groups 13–14 (M200–M250 / M300–M400).
Lightweight concrete by density — groups 11–12 (1900 / 2000 kg/m³).
Aerated concrete (AAC) — groups 5–7 by density class D.
Brick: clay — groups 20–21, sand-lime — 15–16.
Groups 22 (ceramics, tiles) and 23 (marble) measure the same as 2 and 1 — pick whichever is clearer.

Key principle: the group is defined by the material's density, not its name. If torn between two, measure with both and note which agrees better with a reference method.

Measuring correctly

Press all three electrodes until they visibly compress. Don't over-press and don't glide barely touching — both distort the reading.
Material thickness 100 mm or more. Stack thin samples without air gaps; beneath the sample — air or 50 mm+ of polystyrene, never metal or a wet base.
Metal distorts readings. Rebar, profiles, pipes and wiring below the surface raise the result. On reinforced structures measure at several points between bars and take the lowest value.
Several points. Moisture is uneven — scan the area keeping the same pressure; wet zones show up as rising readings.
Wood — along the grain.
After touching visibly wet material, wipe the electrodes dry: moisture on the sensor inflates subsequent readings.

Screed drying control

Right after pouring, the meter shows a blinking ">limit" — that's normal, the material is wetter than the range. As it dries, the over-range indication changes to a numeric reading in a stable manner, and readings then fall gradually. Flooring can go down when the screed consistently reads in the "dry" column at several points, including corners and along walls where it dries slowest.

Indicative moisture levels, % H₂O

Material	Dry	Damp	Wet
Aerated / cellular concrete	0 – 4	4 – 5	> 5
Brick, plaster	0 – 2.5	2.5 – 3.5	> 3.5
Fibre cement	0 – 5	5 – 7	> 7
Ceramic tiles, clinker	0 – 1.5	1.5 – 2	> 2
Concrete, cement screed	0 – 3	3 – 4	> 4
Gypsum, lime mortar	0 – 1	1 – 2	> 2
Marble, sandstone, limestone	0 – 1.5	1.5 – 2	> 2

Wood: furniture-dry 6–9 %; structural (framing, rafters) 12–15 %; above 18–20 % — mould risk; above 28 % — rot.

"Wet" means the material is not ready for further work and needs more drying.

Files

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Metrinco_M120B_instrukcija_UA

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