Customizable, Serviceable Probe
Water content profile with minimal soil disturbance
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The EnviroSCAN probe provides soil-water-content profiles for irrigation scheduling or other water movement systems. The measurement range is oven dry to saturation. The probes measure soil moisture at multiple depths and are easy to install. Tools offered by Campbell Scientific allow the probes to be installed with minimal soil disturbance. EnviroSCAN is recommended for higher accuracy research measurements, measurements deeper than 80 cm, or stony soils. It is customizable by adding sensors at user-specified depths.

Detailed Description

The EnviroSMART probe has been renamed EnviroSCAN.

The EnviroSCAN includes several water content sensors that measure soil water at multiple depths. Around each sensor, the probe creates a high frequency electrical field that extends through the access tube into the soil. Electrical capacitance is then measured and soil water content is determined from those measurements.

Each water content sensor outputs an SDI-12 signal that our CR200(X)-series, CR800, CR850, CR1000, and CR3000 dataloggers can measure. This allows the probes to be integrated with a Campbell Scientific datalogger or weather station. Integrating the probes into our data acquisition systems allows the data to be telemetered back to a field station or remote computer.

EnviroSCAN is customized for individual applications by adding sensors at user-specified measurement depths. The maximum measurement depth of the standard configuration is 2 m (6 ft); deeper measurements are possible with special provisions.


  • Maximum Sensors per Standard Probe: 16
  • Sensor Measuring Principle: high frequency capacitance
  • Output: SDI-12 version 1.2
  • Current Consumption
    • Sleep: 250 µA
    • Standby: 66 mA
    • Sampling: 100 mA
  • Water Content Reading Range: 0 to ~65%
  • Temperature Effects: ±3% (5° to 35°C)
  • Time to Read One Sensor: 1.1 seconds
  • Sphere of Influence: 99% of the reading is taken within a 10 cm radius from the outside of the access tube
  • Diameter (sensor) 5.05 cm (2.0 in)
  • Diameter (access tube): 5.65 cm (2.2 in)
  • Probe Length: 0.5, 1.0, 1.5, or 2.0 m
    (1.6, 3.3, 4.9, or 6.6 ft)
  • Operating Temperature Range: -20° to 75°C


Datalogger Considerations

Compatible Contemporary Dataloggers

CR200(X) Series CR800/CR850 CR1000 CR3000 CR5000 CR7X CR9000X

Compatible Retired Dataloggers

CR500 CR510 CR10 CR10X 21X CR23X CR9000

Frequently Asked Questions

Number of FAQs related to ENVIROSCAN: 2

  1. To protect itself, the interface will switch off when the supply voltage is above or below these operating voltages:

    • Series 1: 9.6 to 20 Vdc (regulated)
    • Series 2: 4.5 to 15 Vdc (regulated)