토양수분, 온도, EC(전도도)센서
5TE sensor
* 기존 ECHO-TE 센서 대체
* EC 센서의 위치를 stainless steel screw로 변경.
* 기존 센서보다 내구성이 높아짐.
The 5TE is designed to measure the water content, electrical conductivity, and temperature of soil and growing media.
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.
In 2006, Decagon incorporated research from its EC-5 volumetric water content sensor into the ECH 2 O-TE, a sensor which measured volumetric water content, temperature, and electrical conductivity. The new 5TE uses the same design theory as the ECH 2 O-TE, but the location of the EC measurement is in the stainless
steel screws instead of gold traces. Thus use of stainless steel screws has made the
5TE a more robust sensor.
5TE Soil Moisture Sensor Applications:
- Fertigation scheduling
- Fundamental research on soil decompostion dynamics
- Plant disease prevention
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* 수분함량 측정범위: 1 ~ 80%
* EC 측정범위: 1 ~ 23 dS/m(bulk)
* 온도 측정범위: -40℃ ~ +50℃
* Accuracy: 수분함량 ±1%, EC ±10%, 온도 ±1℃
* Measurement time: 10ms
* Size: 10×3.2×0.7cm
Accuracy:
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ε a : ±1 ε a (unitless) from 1-40 (soil range), ±15% from 40-80
VWC:
• Using Topp equation: ±0.03 m 3 /m 3 (±3% VWC) typical in mineral soils that have solution electrical conductivity < 10 dS/m
• Using medium specific calibration: ±0.01 - 0.02 m 3 /m 3 (± 1-2% VWC) in any porous medium. |
Resolution:
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ε a : 0.1 ε a (unitless) from 1-20, < 0.75 ε a (unitless) from 20-80 VWC: 0.0008 m 3 /m 3 (0.08% VWC) from 0 to 50% VWC |
| Range: |
Apparent dielectric permittivity (ε a ): 1 (air) to 80 (water) |
Electrical Conductivity(bulk):
| Accuracy: |
±10% from 0-7 dS/m, user calibration required above 7 dS/m |
| Resolution: |
0.01 dS/m from 0-7 dS/m, 0.05 dS/m from 7-23 dS/m |
| Range: |
0-23 dS/m (bulk) |
Temperature:
| Accuracy: |
±1°C |
| Resolution: |
0.1°C |
| Range: |
-40°C to +50°C |
General:
| Dimensions: |
10 x 3.2 x 0.7 cm |
| Probe Length: |
5.2 cm |
| Dielectric Measurement Frequency: |
70 MHz |
| Measurement Time: |
150 ms |
Power:
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3.6 - 15 VDC, 0.3 mA quiescent, 10 mA during 150 ms measurement |
Output:
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Serial TTL, 3.6 Volt Levels or SDI 12 (contact Decagon for information on SDI-12 mode) |
| Operating Temperature: |
-40°C to +50°C |
Connecor Types:
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3.5 mm "stereo" plug or stripped and tinned lead wires (3) |
Cable Length:
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5m standard; custom cable length available upon request |
Datalogger Compatibility
(not exclusive):
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Decagon: Em50, EM50R, ProCheck
Campbell Scientific: CR10X, CR1000, CR3000, etc. |
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