CS650-LC

30 cm Water Content Reflectometer for ET107 Stations

CS650-LC

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30 cm Water Content Reflectometer for ET107 Stations

Pricing

Configuration

w/3m per Sensor -PF w/ Ferrules on Wires-3m
w/5m per Sensor -PF w/ Ferrules on Wires-5m
w/10m per Sensor -PF w/ Ferrules on Wires-10m
w/20m per Sensor -PF w/ Ferrules on Wires-20m
w/30m per Sensor -PF w/ Ferrules on Wires-30m

Qty

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Model:: CS650-LC
Item Number:: 45053
Warranty:: 1 year
Lead time:: 14 days

Overview

30cm Water Content Reflectometer Plus for ET or MetData1 (-50 to +70C)

The CS650-LC is a multiparameter smart sensor that uses innovative techniques to monitor soil volumetric-water content, bulk electrical conductivity, and temperature. This sensor is used with the ET107 Weather Station.

Note: The cable connector for this sensor is suitable for use with an ET107 station. For other cable termination options, use the CS650 sensor instead.

Technical Description

The CS650-LC consists of two 30-cm-long stainless steel rods connected to a printed circuit board. The circuit board is encapsulated in epoxy and a shielded cable is attached to the circuit board for data logger connection.

The CS650-LC measures propagation time, signal attenuation, and temperature. Dielectric permittivity, volumetric water content, and bulk electrical conductivity are then derived from these raw values.

Measured signal attenuation is used to correct for the loss effect on reflection detection and thus propagation time measurement. This loss-effect correction allows accurate water content measurements in soils with bulk EC ≤3 dS m^-1 without performing a soil specific calibration.

Soil bulk electrical conductivity is also calculated from the attenuation measurement. A thermistor in thermal contact with a probe rod near the epoxy surface measures temperature. Horizontal installation of the sensor provides accurate soil temperature measurement at the same depth as the water content. Temperature measurement in other orientations will be that of the region near the rod entrance into the epoxy body.

Specifications

Sensing Volume: 7800 cm³
(~7.5 cm radius around each probe rod and 4.5 cm beyond the end of the rods)
Electromagnetic: CE compliant

Meets EN61326 requirements for protection against electrostatic discharge and surge.
Operational Temperature: -10° to +70°C
Sensor Output: SDI-12; serial RS-232
Measurement Time: 3 ms to measure; 600 ms to complete SDI-12 command
Power Supply Requirements: 6 to 18 Vdc
(Must be able to supply 45 mA @ 12 Vdc.)
Maximum Cable Length: 610 m
(2000 ft) combined length for up to 10 sensors connected to the same data logger control port
Rod Spacing: 32 mm
(1.3 in.)
Ingress Protection Rating: IP68
Rod Diameter: 3.2 mm
(0.13 in.)
Rod Length: 300 mm
(11.8 in.)
Probe Head Dimensions: 85 x 63 x 18 mm
(3.3 x 2.5 x 0.7 in.)
Cable Weight: 35 g per m
(0.38 oz per ft)
Probe Weight: 280 g
(9.9 oz) without cable

Current Drain

Active (3 ms): 45 mA typical
(@ 12 Vdc)
Active (3 ms): 80 mA
(@ 6 Vdc)
Active (3 ms): 35 mA
(@ 18 Vdc)
Quiescent: 135 µA typical
(@ 12 Vdc)

Electrical Conductivity

Range for Solution EC: 0 to 3 dS/m
Range for Bulk EC: 0 to 3 dS/m
Accuracy: ±(5% of reading + 0.05 dS/m)
Precision: 0.5% of BEC

Relative Dielectric Permittivity

Range: 1 to 81
Accuracy: ±(2% of reading + 0.6)
for solution EC ≤ 3 dS/m (for 1 to 40 range)
Accuracy: ±1.4
(for solution EC ≤1.0 dS/m) for 40 to 81 range
Precision: < 0.02

Volumetric Water Content

-NOTE-: Using Topp Equation (m³/m³)
Range: 5% to 50%
Accuracy: ±3% VWC
(typical in mineral soils, where solution EC ≤ 3 dS/m)
Precision: < 0.05%