Envco – Environmental Equipment

APPLICATIONS:
* Fertigation scheduling
* Fundamental research on soil decompostion dynamics
* Plant disease prevention

The 5TE sensor measures soil moisture, soil temperature, and bulk electrical conductivity (EC), three fundamental measurements needed for a variety of plant studies. Three measurements are taken in one sensor allowing more data logger ports to be used for additional environmental measurements. Volumetric water content is obtained by measuring the dielectric constant of the media through the utilization of capacitance/frequency domain technology while EC is obtained using two stainless steel screws.

The 5TE sensor incorporates the same high frequency oscillation as the EC-5, which allows the sensor to accurately measure soil moisture in any soil or soilless media with minimal salinity and textural effects. Applications include plant sprouting and growth studies, plant mortality prevention, and greenhouse monitoring.

SPECIFICATIONS
Volumetric Water Content Specifications

Range: Apparent dielectric permittivity (εa): 1 (air) to 80 (water)
Resolution: εa: 0.1 εa (unitless) from 1-20, <0.75 εa (unitless) from 20-80 VWC: 0.0008 m3/m3 (0.08% VWC) from 0 to 50% VWC
Accuracy: (εa): ±1 εa (unitless) from 1-40 (soil range), ±15% from 40-80 (VWC):
• Using Topp equation: ±0.03 m3/m3 (±3% VWC) typical in mineral soils that have solution electrical
conductivity < 10 dS/m
• Using medium specific calibration: ±0.01 - 0.02 m3/m3 (± 1-2% VWC) in any porous medium.

Electrical Conductivity(bulk) Specifications
Range: 0-23 dS/m (bulk)
Resolution: 0.01 dS/m from 0-7 dS/m, 0.05 dS/m from 7-23 dS/m
Accuracy: ±10% from 0-7 dS/m, user calibration required above 7 dS/m

Temperature Specifications
Range: -40 to 50°C
Resolution: 0.01°C
Accuracy: ±1°C

General Specifications
Dimensions: 10 x 3.2 x 0.7 cm
Prong Length: 5.2 cm

Dielectric Measurement Frequency: 70 MHz
Measurement Time: 150 ms
Power: 3.6 - 15 VDC, 0.3 mA quiescent, 10 mA during 150 ms measurement
Output: RS232 or SDI 12 (contact us for information on SDI-12 mode)

Operating Temperature: -40-50°C
Connector Types: 3.5 mm "stereo" plug or stripped and tinned lead wires (3)
Cable Length: 5m standard; custom cable length available upon request

Datalogger Compatibility (not exclusive): Decagon: Em50, EM50R, ProCheck Campbell Scientific: CR10X, 21X, 23X, CR1000, CR3000, iRIS

Ordering Information
40557 5TE high-frequency moisture, temp, & EC sensor, 5cm (w/ 3.5mm Plug)
40558 5TE high-frequency moisture, temp, & EC sensor, 5cm (w/ bare tinned lead wires)
40559 5TE high-frequency moisture, temp, & EC sensor, 5cm (w/custom-length cable)