N2NNetworked Soil Moisture Monitoring System

N2NThe abbreviation is Network to Network, which means that the data collector is aimed at SDI-12 type sensors and can be combined into large-scale network sensor layouts. The number of sensors ranges from 30 to several hundred, and can be flexibly combined at will. The N2N large-scale soil moisture and water potential monitoring system consists of a data collector, soil moisture sensors, and data download and browsing analysis software, which can be placed in the field for a long time to automatically monitor soil moisture.

Real time, continuous, and in-situ monitoring of changes in soil moisture, temperature, and water potential is the fundamental research equipment for soil hydrodynamics. Widely used in fields such as agricultural evapotranspiration, crop water consumption, forest hydrology, wetland hydrology, grassland ecology, soil erosion, environmental pollution, and water cycle research.

System features

lThe main purpose is to connect SDI-12 sensors that can be networked in harsh environments

lIncludes GPRS module, GPS module, solar power management module

lThe power supply mode can be multiple modes such as internal power supply and external power supply

lInfrared data cable and capable of recording 220000 pieces of data

lAdded SD card to store data for several years

lIntelligent sensor, TDR technology, is currently the soil moisture sensor with the highest measurement accuracy and stability, suitable for various applications

Soil types include high salinity and high conductivity soils, such as Trime-pico32/64, Campbell CS650, and other sensors

lCan simultaneously measure and monitor soil moisture, soil temperature, and conductivity

lCan be optionally connected to stem flow sensors, water potential sensors, meteorological sensors, etc

lFree server service software EMServer2016, which facilitates users to build their own data platform and achieve remote access

View, browse or download data, or use the manufacturer's wireless data platform system.

Technical indicators

Data Collector: GreyBox N2N

l3Up to 6 SDI-12 ports

lSupport SDI-12 standard version 1.3

lBuilt in GPRS and GPS modules

lBuilt in solar panel control module

lChoose one power supply mode, 8 AA batteries or 12V external power supply

lBuilt in precision clock, data with timestamp

lStorage capacity: 220000 measurement records, with built-in SD card that can store data for several years.

lLow power consumption (approximately 350 microamperes during measurement)

lShell protection level IP65

lBuilt in temperature and humidity sensors for sustainable testing inside the casing

lPCData can be downloaded using an infrared data cable

lProfessional data download and analysis software, which can be used for data download, data browsing, and data statistical analysis (such as related analysis, etc.)

lOperating temperature -40 ℃ to+60 ℃

TRIME PICO 64/32Intelligent soil moisture sensor:

lMeasurement range: 0-100% volumetric moisture content

lMeasurement accuracy: 0-40% volume moisture content ± 1%, 40-70% volume moisture content ± 2%

lMeasurement repeatability accuracy 0-40% volume moisture content ± 0.2%, 40-70% volume moisture content ± 0.3%

lSoil temperature measurement range: -15 ℃ -50 ℃ (other temperature ranges can be customized, or an optional -30-50 ℃ temperature sensor can be selected), accuracy ± 0.2 ℃

lSoil conductivity measurement range: 0-20dS/m

lMeasurement volume: PICO64 is 1250ml, PICO32 is 250ml

lInterface types: RS485, IMP-BUS, and SDI-12

lPower consumption: standby 1mA, idle 8mA, measurement 100mA (lasting 2-3 seconds)

lWaterproof rating: IP6

Campbell 650/655Soil moisture sensor:

lMeasurement range: 1-100% volumetric moisture content,

lMeasurement accuracy ± 3% (manufacturer default calibration, EC ≤ 3dS/m)

lSoil temperature measurement range: -50-70 ℃, accuracy ± 0.1 ℃ (when buried in soil at 0-40 ℃)± 0.5 ℃ (all ranges)

lSoil conductivity measurement range: 0-3dS/m (SC650) 0-8dS/m (CS655),

Accuracy ± (5% of reading+0.05ds/m)

lMeasurement volume: CS650 is 7800ml with a probe length of 30cm

CS655A 3600ml probe with a length of 12cm

lInterface type: SDI-12 or RS232

lPower supply: 6V-18V, 45mA@12V ， 80mA@6V When in standby mode, 135 μ A @ 12V

It can also be optionally selectedMeteorological sensors such as rainfall, canopy temperature, air temperature and humidity, solar radiation, etc,

And sensors such as stem runoff.

TEROS 21Soil water potential sensor:

9.6cm(l)x3.5cm(w)x1.5cm(d)Measurement range -9 to -1000000kPa, accuracy ± (10%+2kPa) range -9 to -100kPa, temperature range -40-60℃ accuracy ± 1 ℃

Service Cases：

The above picture shows a research institute installing two soil moisture sensors every three meters in paddy fields (on the left side of the cable) and dry fields (on the right side of the cable). The installation interval between each two sensor profiles is 10cm.

From the graph, we can visually see the temperature change curve of each measurement point from 8 pm to 10 am, as well as the distribution of soil moisture in different strata with different water contents.

Instrument origin:Europe