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Specifications

Product name WD-3-W-5E WD-3-WET-5E
Sensor probe length 5cm
Measuring
Feature
Volumetric water content (VWC)
Electrical conductivity (EC)
Temperature (℃)
Electrical
characteristics
(*1)
Volumetric
water content
(VWC)
Detection
method
folding back parallel transmission line method (Japanese patented number 4189864) (*2)
Measuring
range
air-dry to saturation
Accuracy ±5% F.S
(VWC 0〜50%)
±3% F.S
(VWC 0〜50%)
±15% F.S
(VWC 50〜100%)
±10% F.S
(VWC 50〜100%)
Analog
output
0〜1V 0〜1V
Electrical
conductivity
(EC)
Measuring
range
0〜7mS/cm (*3)
Accuracy ±5% F.S
Analog
output
0〜1V
Temperature
(Probe tip)
Measuring
range
-10〜50℃
Accuracy ±1℃
Analog
output
0〜1.2V
Environment
temperature
Operating temperature range -40〜+50℃
Measuring temperature range 0〜50℃ (*4)
Power supply input DC+4.5〜+15V
Electric current consumption (When +9V is supplied) 40mA(typ) (*5)
Measurement Cable (power supply, signal output ) loose end type, standard cable length 5m (option: 10m, 20m cable length)
enable to mount connector with custom handling (*6)
Specification of Waterproof and Dust-proof totally waterproof (IP68 equivalent)
Dimensions (only main body) L(120mm)×W(36mm)×H(12mm)/≦40g
Data Logger besides our product(WDR-1/WDR-2), enable to interface with general measuring equipment and general data logger

(*1)   Output voltage would be varied in some cases of soil`s characteristic.
Output voltage is adjusted by setting solvent's (including soil) relative permittivity εto 4 (soil's reference value).
Volumetric water content (VWC) and electric conductivity (EC) could be different depending on soil or environment being measured.
(*2) "ARP Co.,Ltd" has concluded a treaty with the patent right holder "Kagoshima Technology Licensing Organization Co.,Ltd".
(*3) It indicates measurement range as NaCl, sodium chloride, in 100% water solution.
It might be possible to display mS/cm as unit of electrical conductivity (EC), but it has same meaning and has interrelationship.
(*4) because of the significant fluctuation of relative permittivity εof water below 0℃ (in frozen condition)
(*5) The electrical current power supply when having a condition when soaking entire probe in 7mS/cm solution.
(*6) Special connector is needed when it is connected to WDR-1.
Clients who have "loose end type " can use connector installation service for a charge.

Figure of the project.



 
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