Decagon Devices MAS-1 Benutzerhandbuch - Seite 7

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2 ABOUT THE MAS-1

1. Red wire: (+) supply

2. Black wire: (-) output

3. Shield: Not connected

Measurement

Type: Volumetric water content (VWC)

Range: 0 to 100% VWC typical

Resolution: Depends on current measurement (data acquisi-

tion) device

Accuracy:

growing media up to 65% VWC, above which accuracy lessens.

Increased accuracy can be achieved with a medium speciﬁc cali-

bration. For more information on how to perform your own me-

dia speciﬁc calibration, or to have Decagon's calibration service

perform one for you, visit us online at http://www.decagon.com

Output: 4-20 mA current proportional to VWC

Sensor measurement interval: 1 second

Operating Environment

Temperature:

Sensors can be used at higher temperatures under some condi-

tions. Contact Decagon for more details

Physical Properties

Dimensions: 8.9 cm x 1.8 cm x 0.7 cm

Cable: 2 m or 5 m (standard), 3 wire (22 AWG tinned Red and

Black wires, 24 AWG tinned bare wire); (Custom cable length

available upon request)

6% VWC with generic calibration for supported

40 to 60 C

MAS-1