EP100G-L: Sub-surface soil moisture probes

EP100G-L: Sub-surface soil moisture probes

Soil sensor for continuous measurement of soil moisture and temperature along a vertical profile. With sensing depths from 40 to 160 cm, it provides root-zone insights beyond surface measurements – supporting optimized irrigation and agrometeorological monitoring.
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EnviroPro sensitivity (per probe) as a function of sampled volume

  • EP100GL-04 – EnviroPro 40 cm (4 sensors): 6.4 litres total soil volume detected
  • EP100GL-08 – EnviroPro 80 cm (8 sensors): 12.8 litres total soil volume detected
  • EP100GL-12 – EnviroPro 120 cm (12 sensors): 19.2 litres total soil volume detected
  • EP100GL-16 – EnviroPro 160 cm (16 sensors): 25.6 litres total soil volume detected

Measurement characteristics
Moisture resolution 0.01%
Salinity resolution 0.001 dS/m
Temperature resolution 0.01 °C
Moisture accuracy +/- 2% @ 0% VWC to 50% VWC (*with respect to dielectric)
Useable salinity range 0 to 6 dS/m* (*upper limit of non-contact capacitance sensors.)
Salinity accuracy +/- 5% @ 0-4 dS/m at 10%-30% VWC
Temperature accuracy +/- 1 °C @ 25 °C
Units of measure
– Volumetric Water Content VWC%
– Salinity dS/m
– Temperature °C or °F
– Interface SDI-12 version 1.3
Operating temperature range -20 °C to 60 °C

Electrical characteristics (recommended voltage range 5.6 to 16 VDC)

EnviroPro
EP100GL-0440 cm (4 sensors)

EnviroPro
EP100GL-0880 cm (8 sensors)
EnviroPro
EP100GL-12120 cm (12 sensors)
EnviroPro
EP100GL-16160 cm (16 sensors)
Sleep current 0.45 mA max 0.90 mA max 1.35 mA max 1.80 mA max
Idle current 7 mA max 14 mA max 21 mA max 28 mA max
Active current (not sampling) 32 mA max 39 mA max 46 mA max 53 mA max
Active current (sampling) 72 mA max 79 mA max 86 mA max 93 mA max
Active time / sampling time** 380 ms 760 ms 1140 ms 1520 ms
** measurement sampling time occurs within the active time period
Diameter 33.5mm +/-0.2mm
Field of influence 55mm from wall of probe
Cable length 5m

*EC upgradable – ALL probe models utilise salinity compensation techniques for greater accuracy, but only pro models can output salinity metrics. Standard models can be upgraded to enable salinity metrics pre or post purchase and pre or post installation with an upgrade key.

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