Short answer: There is no single floorboard moisture number that can be responsibly applied to every timber, building and oiling system from this product record. The listed Scannertester meter is sourced against the Extech MO50, which Extech describes for wood readings from 5 to 50% with a maximum pin resolution of 0.10%. Those figures describe the instrument's range and resolution, not the moisture condition required by a particular oil. Use the timber, flooring and finish manufacturers' current instructions, take repeat readings at representative points, and write manufacturer does not specify when the relevant threshold, accuracy or calibration detail is absent.

The short answer is not one number

The question sounds numerical, but the available evidence is not a universal floor-finishing table. Extech publishes the MO50's wood range as 5 to 50% and its maximum pin resolution as 0.10%. The Scannertester product page ties the listed instrument to that MO50 configuration. Neither cited product source specifies one acceptable moisture value for every floorboard before every oil.

A reading can therefore be useful evidence without being a release decision. If the finish maker's instructions name a limit for the exact product and floor system, use that instruction. If not, write manufacturer does not specify and ask the finish maker or a competent flooring professional rather than deriving a threshold from the instrument display.

Product use sequence

Prepare a useful reading record

The buyer's practical task is to make readings comparable. Note the timber type if known, the floor area, the finish intended, the reading location and any visible difference between boards. Do not present the highest or lowest point as the condition of the whole floor without explaining how it was selected.

The product manufacturer does not specify in the cited facts how a particular floor coating, sealant or existing finish changes the reading. That limitation matters when a floor has paint, oil, wax, adhesive, a damp substrate or a recent repair. Treat the surface history as an open question.

  1. Read the finish manufacturer's preparation instructions before choosing a pass or fail rule.
  2. Select representative boards and record several readings using the same contact method and notes.
  3. Compare the pattern with the exact manufacturer's requirement, keeping unit and material differences visible.
  4. Delay coating and obtain advice when the readings vary sharply, the substrate is unknown or the instructions do not cover the situation.

Separate moisture evidence from finish advice

The MO50's published range and resolution do not establish accuracy, repeatability across species or the moisture below the 8 mm contact pins. The product manufacturer does not specify those details on the cited page. A precise-looking display can still be insufficient for a coating decision if the measurement method and finish requirement do not match.

Use the reading as one input in the preparation record. The oil manufacturer remains the source for surface preparation, application conditions and any stated moisture limit. If the oil documentation is silent on the exact floor system, manufacturer does not specify is the accurate answer, not a reason to borrow a number from another product.

Limits and safety before pressing the pins

HSE warns that refurbishment work can expose people to electrical risk and says specialist electrical work should be done by trained and competent people. Do not use the meter as a hidden-service finder or push pins into an area where the floor construction is not understood. Stop and use the appropriate competent trade if a measurement could contact an electrical installation or another concealed service.

The cited product facts do not specify a safe method for every finished or concealed floor surface, and they do not guarantee a coating outcome, service life or structural diagnosis. Select the meter only for the narrow documented function and keep the finish decision with the relevant manufacturer.

The responsible answer is a documented comparison, not a universal number: measure consistently, follow the exact oil instructions and leave unsupported limits as manufacturer does not specify. Read Wood Moisture Meter Before Hardwax Oil: A Careful Buying Guide for related guidance. Read Timber Floor Moisture Meter UK: What to Check Before Oiling for related guidance. Review the documented specification on the Pin moisture meter product page before ordering.

Sources and safety context