ET107 Evapotranspiration Monitoring Station

for better irrigation scheduling

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:

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   

  

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   

  

Wind Speed 

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

 

 

ET107 Evapotranspiration Station

Download

ET107 Evapotranspiration Monitoring Station

Download

ET Station Pole Assembly Guide

Download

Product reviews

Review ET107 Evapotranspiration Monitoring Station

5 0% | 0 review
4 0% | 0 review
3 0% | 0 review
2 0% | 0 review
1 0% | 0 review
Review ET107 Evapotranspiration Monitoring Station
Choose a image
0 character ( Minimum of 10)
    +

    There are no reviews yet.

    No comments yet

    Related products

    Cảm biến đo tầm nhìn khí quyển CS120A

    CS120A Atmospheric Visibility Sensor

    High-Performance Visibility Measurements
    Find out more
    Cảm biến dòng điện xoay chiều

    CS11-L AC Current Sensor

    Measure the ac Current along an Electrical Wire
    Find out more
    Cảm biến đo áp suất khí quyển CS106

    CS106 Barometer

    Wider Pressure Range, Resides inside weatherproof enclosure
    Find out more
    Cảm biến đo áp suất khí quyển CS100

    CS100 Barometric Pressure Sensor

    Standard Barometer, resides inside a weather-proof enclosure
    Find out more
    Cảm biến đo mực nước và nhiệt độ nước CRS456V 

    CRS456V Titanium Vented Stand-Alone Pressure Transducer

    Pressure Transducer Combined with a Recorder, High resolution and accuracy
    Find out more
    Cảm biến áp suất CRS456

    CRS456 Titanium Stand-Alone Pressure Transducer

    Self-Contained Memory, Easy to use software, reliable hardware
    Find out more
    Cảm biến áp suất

    CRS451 Stainless-Steel Stand-Alone Pressure Transducer

    Self-Contained Memory, Easy to use software, reliable hardware
    Find out more
    Hệ thống đo lường luồng khí theo phương pháp eddy-covariance

    CPEC310 Expandable Closed-Path Eddy-Covariance System with EC155, Pump Module, and Automatic Zero and Span

    Fully Expandable Design, Provides additional ports with automatic zero and span
    Find out more
    error: Content is protected !!