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Wood dryers (drying kilns) catalogue (.PDF 4MB)
Wood dryers (drying kilns) catalogue (.PDF 4MB)

Catalogo Secadores de madera (.PDF 4MB)
ESP/ENG Catalogo secadores de madera / Wood dryers (drying kilns) catalogue (.PDF 4MB)

Katalog holztrockner Catalogue de sechoirs a bois (.PDF 4MB)
GER/FRA Katalog Holztrocknung / Catalogue de Séchoirs à bois (.PDF 5MB)

 Measurement & control equipment catalogue (.PDF 2.8MB)
Measurement & control equipment catalogue (.PDF 2.8MB)

Since 1990


portable moisture content meter

RVD-904 - Portable wood moisture content meter

Wood dryers:
Conventional kilns
Dehumidifying dryers
Mini (Low-cost) kilns (NKS)
Heat pumps
Additional equipment
Power electric switch board

Catalogues and manuals:
Wood dryer catalogue (.pdf 3.7MB)
NIGOS dryers (.pdf 956KB)
User manuals
Measurement&controll equipment catalogue (.pdf 2.8MB)

Automatic controllers for wood drying:
MC-411R, MC-412, MC-900R, MC-502R,
MC-600, MC-2000
Automation of existent conventional kilns

Archive (obsolete products no longer produced):
 (MC-100RM, MC-500R, MC-100R, MC-1000)

Wood MC meters:
Portable moisture meter RVD-904
Nondestructive moisture meter DVD-241
Nondestructive moisture meter MCD-50

Control unit for steaming chambers PD-02
ISPM-15 wood pallet sterilization unit MKS-05

  • Measurement:
    • Moisture content:
      measurement of all wood types moisture content in range 6% to 100% at the temperature in range -10°C up to 80°C (temperature compensation)
    • Moisture content in construction materials:
      OPTIONAL - When a special probe is delivered, RVD-904 can measure moisture content in construction materials (concrete, mortar, gypsum, etc...)
    • Air temperature/humidity:
      OPTIONAL - If the probe DSVT-03 is delivered, RVD-904 can measure temperature in range 5°C up to 85°C and relative air humidity in range 5 %RH up to 100 %RH
  • Device is delivered in a rigid plastic case with following content:
    • RVD-904 device
    • Hammer action electrode
    • Connection cable
    • Probe for air temperature measurement
    • DSVT-03 probe for air temperature/humidity measurement (OPTION)
    • Pair of probes for moisture content measurement in construction materials (OPTION)

Universal portable (hand held) moisture content meter RVD-904 is made for on-field wood, timber or pallets MC measurement of all wood types. It can be used as universal device for MC measurement because it can also measure:
- moisture content of saw dust when connected to VP-01 device (optional)
- moisture content of construction materials (concrete, gypsum, mortar, etc...) with special probes for concrete (optional) as well as
- air temperature and relative humidity inside the chamber when a probe DSVT-03 is delivered (optional).
Main characteristic of RVD-904 is its portability, since it is battery operated and is intended for usage in the drying chambers and on the field. Device is equipped with built-in indication that alert the user when the battery is low.

Device is very easy to operate with.
It has large LC display which shows all relevant data and flat keyboard for easy access to all functions and settings. For moisture content measurement of any wood type it is necessary to enter appropriate type of wood (one of 4 basic types according to data given in User's manual) with temperature compensation in range -10°C to 80°C. This compensation represent the temperature of wooden sample at the moment of MC measurement. Temperature compensation is not used for MC measurement of construction materials.

ADDITIONAL PROBES (option which is separatelly ordered):
Sonde za furnir Probes for veneer MC measurement are contact probes which do not damage sample during measurement. Complete probes are made of stainless steel (INOX) and they are easily inserted into holes on te side of RVD-904. Good contact and measurement is provided by use of special conductivity materials.

wood dryer

Uredjaj za merenje vlage pijevine VP-01 VP-01 device for sawdust moisture content measurement is sold separatelly. It is specially modified aluminium cylinder with RVD-904 mounting bracket. Sawdust in the cylinder is compressed during measurement, and RVD-904 is used to perform MC reading. Protection feature is implemented to protect device from exceeded pressure and damage.

wood dryer

Sonda za beton Concrete and other building materials moisture content probes are used without contact mass. it is enough to drill 2 holes in the concrete and place probes connected to RVD-904 in them. After measurement parameters are adjusted, measurement can be performed.

wood dryer

Sonda za vlagu i temperaturu DSVT-03 Air temperature and relative humidity is performed when probe DSVT-03 is attached to RVD-904.

NOTE: Since there are several configuration and delivery options, customer must specify which configuration wants upon ordering (with or without the special probes for air temperature / humidity measurement and probes for construction materials).

Handheld MC meter RVD-904 characteristics are given in following tables:

  Technical Data

 Power supply

 Battery 9 Vdc; 90mVA max


 Single, 3 1/2-digit LCD, 13mm

 Measurement resolution


 Operating conditions

 T: -10 ÷ 50°C; RH: 0 ÷ 100%


 T: -40 ÷ 85°C; RH: 5 ÷ 90%

 Dimensions (WxHxD)(mm)

 80 x 160 x 40 (mm)



 Supported probes

 Wood MC measurement

 Electrodes for wood MC, 56mm, Ø2.5mm

 Veneer MC measueremt

 Contact electrodes for veneer measurement

 Sawdust MC measurement

 VP-01 for sawdust pressing and sampling

 Concrete MC measurement

 Electrodes for concrete MC, Ø8 x 60 (mm)

 Air temperature and relative humidity

 Probe DSVT-03

©2011 NIGOS-elektronik

18000 Nis • Srbija • Borislava Nikolica - Serjoze 12
Phone/fax. +381 18 211-212, 217-468 • E-mail: