Digital concrete floor moisture meter before painting swimming pool primer

This moisture meter is a professional moisture meter for measuring the moisture level in building materials (cement, concrete, plaster, brick, etc.). The measurement is the basis for whether it needs to be dried further to better protect the quality for woodworking, building construction and agricultural industries.

Features:
  - Fast measurement
  - Quickly measure the moisture content of a variety of materials with maximum and minimum readings
  - Wide range and accuracy - Humidity 0%~80%RH Resolution: 0.10% Accuracy: ± 2%   
   - Stable performance and fast response
   - Reliable for contractors and homeowners to test the moisture content in wood, basements, building materials, drywall, horticulture and carpets. 8 material types to choose from
   -  Press the "M" button to select the appropriate material type (1, 2, 3, 4, A, B, C, D). More practical with multi-purpose functions.
   - Auto power off in 10 minutes without any operation. Large LCD display, easy to read. The probe is well protected.
   - By plastic cover, not easy to be damaged. The product is protected by a soft protective cover. Different modes for different material types:
   A: Carstenite (0%~11.0%)      
   B: Cement (0%~8.6%)
   C: Lime (0%~9.9%)
   D: Brick (0%~16.5%)

Specifications:
   Color: Black
   Material: ABS plastic
   Display: LCD
   LCD size: 30*35mm
  Cement measuring range B: 0% ~ 8.6%  
   According to different material types to select the following modes:
        Type1: 0% ~ 80%, Type2: 0% ~ 80%, Type3: 0% ~ 80%, Type4: 0% ~ 80%
   Resolution: 0.10%
   Accuracy: ± 2%
   Can measure other materials:
        A-Karstenite,
       B-Cement Mortar,
      C-Lime Mortar,
      D-Brick          
  Measuring principle: Electrical resistivity
   Electrode pin: built-in
   Auto power off time: about 10 minutes
   Other functions: 8 kinds of material type selection function
   Power supply: 3 * 1.5V AAA batteries (not included)
   Working environment: Temperature: 0~40
   Relative humidity: 20%~90%
   Storage environment: Temperature: -40~70
   Relative humidity: 0~70%
   Item size: Approx. 130 * 49 * 30mm / 5.1 * 1.9 * 1.2in
   Item weight: Approx. 108g /3.8oz
   Package weight: Approx. 176g /6.2oz
   Package Size: Approx. 19 * 8 * 5cm / 7.5 * 3.1 * 2.0in

Package List:
   1 * Hygrometer
   1 * User Manual (English)