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ET107 Evapotranspiration Monitoring Station

for better irrigation scheduling

9 ₫

The ET107 is an automated weather station designed for irrigation scheduling in turf grass and commercial agriculture applications. The station calculates potential evapotranspiration (ETo), which is the amount of water lost from the soil due to evaporation and plant transpiration. Calculating evapotranspiration rate can aid in the development of an irrigation schedule that provides sufficient water without overwatering.

Category: Uncategorized

Our ET107 ETo station consists of meteorological sensors, an aluminum 3-m pole, and an environmental enclosure that houses a CR1000M module and a 7-Ahr sealed rechargeable battery. The battery is recharged via ac power or a 10-W solar panel. Sealed circular connectors are provided on the outside of the enclosure to simplify sensor hookup.

Meteorological sensors included with the ET107 are the CS305-ET Solar Radiation Sensor, HMP60-ETS Air Temperature and Relative Humidity Probe, TE525-ET Tipping Bucket Rain Gage, and either the 034B-ETM Wind Set or WindSonic1-ETM 2-D Sonic Wind Sensor.

The ET107 can also measure the:

- 107-LC Soil Temperature Probe (-35° to +50°C)
- 108-LC Soil Temperature Probe (-5° to +95°C)
- CS616-LC Soil Water Content Reflectometer
- CS650-LC 30 cm Water Content Reflectometer Plus
- CS655-LC 15 cm Water Content Reflectometer Plus

Benefits and Features

- Monitors temperature, relative humidity, wind speed and direction, solar radiation, and precipitation
- Automatically calculates potential evapotranspiration (ETo)
- Accurate measurements you can rely on
- Pre-configured with some pre-assembly for easy installation
- Rugged, low-power design for long-term, reliable operation
- Looks great and fits well in public settings
- Multiple sensor and communication options

CR1000 – Measurement and Control Datalogger

Operating Temperature Range	-25° to +50°C (standard) -55° to +85°C (extended) Non-condensing environment
Analog Inputs	16 single-ended or 8 differential (individually configured)
Pulse Counters	2
Voltage Excitation Terminals	3 (VX1 to VX3)
Communications Ports	CS I/O RS-232 Parallel peripheral
Switched 12 Volt	1 terminal
Digital I/O	Certain digital ports can be used to count switch closures. 8 I/Os or 4 RS-232 COM I/O ports can be paired as transmit and receive for measuring smart serial sensors.
Input Limits	±5 Vdc
Analog Voltage Accuracy	±(0.06% of reading + offset) at 0° to 40°C
ADC	13-bit
Power Requirements	9.6 to 16 Vdc
Real-Time Clock Accuracy	±3 min. per year (Correction via GPS optional.)
Internet Protocols	FTP, HTTP, XML, POP3, SMTP, Telnet, NTCIP, NTP
Communication Protocols	PakBus, Modbus, DNP3, SDI-12, SDM
Warranty	3 years
Battery-backed SRAM for CPU Usage & Final Storage	4 MB
Idle Current Drain, Average	< 1mA (@ 12 Vdc)
Active Current Drain, Average	1 mA (1 Hz sample rate @ 12 Vdc without RS-232 communication) 16 mA (100 Hz sample rate @ 12 Vdc without RS-232 communication) 28 mA (100 Hz sample rate @ 12 Vdc with RS-232 communication)
Dimensions	23.8 x 10.1 x 5.4 cm (9.4 x 4.0 x 2.1 in.) 25.2 x 10.2 x 7.1 cm (9.9 x 4.0 x 2.8 in.) with CFM100 or NL116 attached
Weight	1.0 kg (2.1 lb)

CS305-ET | Solar Radiation Sensor for ET107 Stations

Light Spectrum Waveband	300 to 1100 nm
Measurement Range	0 to 2000 W m-2 (full sunlight ≈ 1000 W m-2)
Absolute Accuracy	±5% for daily total radiation
Sensitivity	0.2 kW m-2 mV-1
Cosine Response	±4% (at 75° zenith angle) ±1% (at 45° zenith angle)
Temperature Response	< 1% (at 5° to 40°C)
Long-Term Stability	< 2% per year
Diameter	2.4 cm (0.9 in.)
Cable Length	152.4 cm (60 in.)
Height	2.5 cm (1.0 in.)
Weight	65 g (2.3 oz)

HMP60-ETS | Temperature/RH Probe for ET Station with Shield Adapter

Supply Voltage	5 to 28 Vdc (typically powered by datalogger’s 12 V supply)
Typical Current Consumption	1 mA
Maximum Current Consumption	5 mA
Filter Description	0.2 µm Teflon membrane
Settling Time	1 s
Sensor Body Material	AISI 316 stainless steel
Filter Cap Material	Chrome-coated ABS plastic
Classification	IP65
Filter Diameter	1.2 cm (0.5 in.)
Sensor Diameter	1.2 cm (0.5 in.)
Sensor Length	7.1 cm (2.8 in.)
Cable Length	137.16 cm (54 in.)
Weight	117.93 g (0.26 lb)
Temperature
Temperature Sensor	1000 ohm Platinum Resistance Thermometer
Measurement Range	-40° to +60°C
Accuracy	±0.6°C

Relative Humidity
Sensor	Vaisala’s INTERCAP capacitive chip
Measurement Range	0 to 100% RH (non-condensing)
Accuracy (0 to 90% RH)	±5% (-40° to 0°C) ±3% (0° to 40°C) ±5% (40° to 60°C)
Accuracy (90 to 100% RH)	±7% (-40° to 0°C) ±5% (0° to 40°C) ±7% (40° to 60°C)

TE525-ET | Rain Gage with 6 in. Orifice for ET Station

Sensor Type	Tipping bucket/magnetic reed switch
Material	Anodized aluminum
Temperature	0° to 50°C
Resolution	1 tip
Volume per Tip	4.73 ml/tip (0.16 fl. oz/tip)
Rainfall per Tip	0.254 mm (0.01 in.)
Accuracy	1.0% up to 2 in./h (50 mm/h)
Cable	2-conductor shielded
Funnel Collector Diameter	15.4 cm (6.06 in.)
Height	24.1 cm (9.5 in.)
Cable Length	139.7 cm (55 in.)
Tipping Bucket Weight	0.9 kg (2.0 lb)
Cable Weight	0.1 kg (0.2 lb) per 3.05 m (10 ft) length

034B-ET | Wind Set for ET Station

Operating Temperature	-30° to +70°C
Cable Length	170.18 cm (67 in.)
Weight	907 g (2 lb)

Wind Speed (Anemometer)
Range	0 to 75 m/s (0 to 167 mph)
Accuracy < 10.14 m/s (22.7 mph)	0.1 m/s (0.25 mph)
Accuracy > 10.14 m/s (22.7 mph)	±1.1% of true
Resolution	(0.7998 m s-1) / (scan rate in seconds) or (1.789 mph) / (scan rate in seconds)
Starting Threshold	0.4 m/s (0.9 mph)
Sensor Output	Pulsed contact closure
Anemometer Radius	10.7 cm (4.2 in.)
Anemometer Height	24.4 cm (9.6 in.)

Wind Direction (Vane)
Mechanical Range	360°
Electrical Range	356° (4° open)
Accuracy	±4°
Damping Ratio	0.25
Resolution	< 5°
Potentiometer Resistance	0 to 10 kΩ (open at crossover)
Vane Length	33.5 cm (13.2 in.)

WINDSONIC1-ET | 2-D Sonic Wind Sensor with RS-232 Output for ET107 Station

Operating Humidity	< 5% to 100% RH
Operating Temperature	-35° to +70°C
Storage Temperature	-40° to +80°C
Input Voltage	9 to 30 Vdc
Typical Current Drain	~15 mA (continuous)
Measurement Frequency	40 Hz block averaged to a 1 Hz output frequency
Outputs Parameters	Polar (direction and speed) or orthogonal (Ux and Uy wind)
Output Signal	RS-232
Maximum Cable Capacitance	2500 pF
Maximum Cable Length	15.24 m (50 ft) For configurations requiring longer cable lengths, contact an application engineer at Campbell Scientific.
Diameter	14.2 cm (5.6 in.)
Length	16.0 cm (16.3 in.)
Weight	0.5 kg (1.1 lb)

Wind Direction
Range	0° to 359° (no dead band)
Accuracy	±3°
Resolution	1°

Wind Speed
Range	0 to 60 m/s
Accuracy	±2% (@ 12 m s-1)
Resolution	0.01 m/s

WINDSONIC1-ET | 2-D Sonic Wind Sensor with RS-232 Output for ET107 Station

Operating Humidity	< 5% to 100% RH
Operating Temperature	-35° to +70°C
Storage Temperature	-40° to +80°C
Input Voltage	9 to 30 Vdc
Typical Current Drain	~15 mA (continuous)
Measurement Frequency	40 Hz block averaged to a 1 Hz output frequency
Outputs Parameters	Polar (direction and speed) or orthogonal (Ux and Uy wind)
Output Signal	RS-232
Maximum Cable Capacitance	2500 pF
Maximum Cable Length	15.24 m (50 ft) For configurations requiring longer cable lengths, contact an application engineer at Campbell Scientific.
Diameter	14.2 cm (5.6 in.)
Length	16.0 cm (16.3 in.)
Weight	0.5 kg (1.1 lb)

Wind Direction
Range	0° to 359° (no dead band)
Accuracy	±3°
Resolution	1°

Wind Speed
Range	0 to 60 m/s
Accuracy	±2% (@ 12 m s-1)
Resolution	0.01 m/s

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Benefits and Features

ET107 Evapotranspiration Station