This sensor offers a standard 4-20 milliamp output that is
common with PLCs and irrigation controllers*.
With the 4-20 mA interface, cable lengths over 250 feet are
possible.
Research Grade Accuracy
Like our other soil moisture sensors, the MAS 1 measures
soil moisture accurately without the sensitivity to electrical
conductivity and variation in soil types that have plagued
inexpensive sensors in the past.
The MAS 1 delivers research-grade accuracy at a price that makes
large sensor networks economically practical. You can adequately
characterize your site with sensors at multiple depths and
locations, even if you're on a tight budget. And the MAS 1's
ultra-long cable lengths give you even more flexibility to put your
sensors where you want them.
Reasons to pick the MAS1
- If you need a 4-20 milliamp sensor
- If you need cable lengths greater than 250 feet
Engineered for Accuracy
The MAS1 determines volumetric water content (VWC) by measuring
the dielectric constant of the media using capacitance/frequency
domain technology. The sensor uses a 70 MHz frequency, which
minimizes salinity and textural effects, making the MAS1 accurate
in almost any soil or soil-less media. Factory calibrations are
included for mineral soils, potting soils and rockwool.
| Electrical |
| Interface |
Standard 4-20 mA analog transmitter |
| Supply Voltage |
10-32 VDC continuous |
| Output Current |
4 - 20 mA |
| Overvotage Protection |
Yes |
| Settling Time |
4 seconds |
| Wiring |
Red Wire: (+) supply
Black Wire: (-) output
Shield: not connected |
| Measurement |
| Type |
Volumetric water content (VWC) |
| Range |
0-100% VWC typical |
| Resoultion |
Depends on current measurement (data aquistion) device |
| Accuracy |
±6% VWC with generic calibration for supported growing
media up to 65% VWC, above which accuracy lessens. Increased
accuracy can be achieved with a mediumspecific calibration. |
| Output |
4-20 mA current proportional to VWC |
| Sensor Measurement Interval |
1 second |
| Operating Enivornment Temperature |
-40 to 80°C |
| Physical Properties Dimensions |
8.9 cm x 1.8 cm x 0.7 cm |
| Cable |
5 m, 2 wire as standard, Custom cable length available upon
request |
| Warranty: |
One year, parts and labour |
We periodically send an email
newsletter containing updates, new product releases, training and
advice. If you would like to receive these please subscribe
below.
Labcell Limited
exclusively supply and support METER products in the UK &
Ireland.
Non UK/Ireland Customers, please contact METER Environment at:www.metergroup.com/environment/
These innovative sensors will enable you to monitor soil
moisture accurately and affordably with a standard 2-wire, 4-20 mA
analogue interface for use with many data acquisition and control
systems.
*The MAS 1 cannot be used with our standard data
loggers.
Email us to request a quotation for the
MAS 1 Soil Moisture Sensor.
