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Find out moreMileSight EM500-SMTC is a wireless sensor designed for monitoring soil condition, by measuring soil temperature, relative humidity and electrical conductivity; and transmitting data using LoRaWAN® technology.
With low power consumption and a high capacity internal battery, the EM500-SMTC can work up to an estimated 10 years depending on transmit frequency.
What is soil moisture?
Soil moisture is simply the amount of water captured and contained within soil. It is dependent on a range of factors, including precipitation or irrigation, temperature, humidity and soil type.
Each soil type (Loam, Sandy and Clay) holds moisture differently. It’s important to know your soil type and understand it’s characteristics to help interpret soil moisture readings. The moisture state of soil is estimated by measuring several conditions, including soil temperature, soil humidity and electrical conductivity.
How to interpret the data?
The EM500-SMTC can only measure 1 litre of soil around, therefore best results are obtained by burying the sensor probe in a representative area with the major soil type, typical terrain and average yield to get accurate results.
The EM500-SMTC has four output metrics:
Electrical Conductivity
Electrical conductivity serves as an indicator of soil salinity, which, in turn, reflects the concentration of salts in the soil. Very high EC values of >16000µS/cm is an indication of strong saline soils while EC values below 2000 µS/cm show poor or non-saline soil.
Optimal EC range is 1100 µs/cm to 5700 µs/cm with the average soil EC being 3028.12 µS/cm.
Wireless Transmission
Technology: LoRaWAN®
Frequency: CN470/IN865/RU864/EU868/US915/AU915/KR920/AS923
TxPower: 16dBm(868)/20dBm(915)/19dBm(470)
Sensitivity: -137dBm @300bps
Mode: OTAA/ABP Class A
Measurement
Moisture
Range: 0% ~ 100% RH
Accuracy: ±2%(0~50%), ±3%(50%~100%)
Resolution: 0.01%
Temperature
Range: -40°C ~ 80°C
Accuracy: ±0.5°C
Resolution: 0.1°C
Operation
Power On & Off: NFC, Power Button(Internal)
Configuration: Mobile App(via NFC) or PC Software(via USB Type-C)
Physical Characteristics
Cable Length: 2m
Power Supply: 19000 mAh Li-SOCL2 battery (ER34615)
Battery Life*: 10years (10 min interval)
Operating Temperature: -30°C to +70°C
Relative Humidity: 0% to 100% (non-condensing)
Ingress Protection: IP67 (Transceiver)/IP68(Soil Sensor)
Dimension: Transceiver: 105.4 × 71 × 69.5mm (4.1 × 2.8 × 2.7in)
Soil Sensor: 88 × 68 × 26mm (3.5 × 2.7 × 1.0in)
(Probe length: 50mm/1.97 in)
Installation: Pole, wall or DIN Rail Mounting
Approvals
Regulatory: CE, FCC, RoHS
*Tested under laboratory conditions and for guideline purposes only.
Leveraging Microsoft Azure platform and Qrious, IoT Bridge is a central dashboard that lets you control, configure and get insights from your IoT devices.
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