B08_Attachment_1_Specs.pdf
PDF 262 KB Posted
- Attached to
- Mobile Weather Stations for SWRO Water Resources
- Solicitation number
- 140A0726Q0010
About this file
This document is a specifications sheet for mobile weather stations issued by the Bureau of Indian Affairs Southwestern Regional Office, Division of Natural Resources, Water Resources & Irrigation, dated June 18, 2026.
The specification requires a research-grade mobile weather station comparable to the Campbell ET107, featuring a mounting tripod up to 10 feet in height and equipped with precipitation/rain gauge, temperature gauge, humidity sensor, wind speed and direction gauge, and solar radiation sensor. The system must include a data logger capable of automatically calculating evapotranspiration using the Penman-Monteith method, along with all required mounting, calibration, and power kits. The data logger must meet Campbell CR1000M or similar specifications, including a processor with CPU drive of 50 MB serial flash or greater, 16 single-ended or 8 differential analog input channels, data storage capacity of 50 MB or greater, program execution period of 100 ms to 1 day, and timing accuracy of ±3 minutes per year or greater. The tipping bucket rain gauge must comply with Texas Electronics TE525-5m or similar standards, with closure time of 135 ms or faster and bounce settling time of 0.75 ms or lower. Additional sensor requirements include solar radiation sensor (Campbell CS305-ET or similar) with spectral range of 300-1100 nm and measurement range of 0 to 2000 W/m², humidity and temperature sensors (Campbell HMP60-ETS or similar) with temperature range of -40 to 60°C and humidity accuracy of ±3-5%, and wind speed and direction gauge (Campbell MW 034B-ET) with range of 0 to 75 m/s and directional accuracy of ±5° or better. All sensors must be compatible with the data logger and mounting tripod with complete mounting kits and power sources included.
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Other files
| File | Type | Posted |
|---|---|---|
| B08_Attachment_1_Specs_Updated_0002.pdf | ||
| Sol_140A0726Q0010_Amd_0002.pdf | ||
| Sol_140A0726Q0010_Amd_0001.pdf | ||
| B11_Q_A_140A0726Q0010_0001.docx | DOCX document | |
| Sol_140A0726Q0010.pdf | ||
| B08_Attachment_2_IA_-_IEE_Representation_Form.pdf |
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Text version
Bureau of Indian Affairs Southwestern Regional Office
Division of Natural Resources, Water Resources & Irrigation
Specifications
Mobile Weather Stations
For ET measurements
June 18, 2026
General Description:
Research grade mobile weather station: Campbell, ET107 or similar
• Mounting Tripod: Up to 10 feet, 3 meters height
• Precipitation/Rain gauge (in or mm)
• Temperature gauge (F° or C°)
• Humidity sensor, relative humidity (RH%)
• Wind Speed & direction gauge (mph or meters/s)
• Solar Radiation Sensor (W/m2).
• Data Logger, that can automatically Calculate Evapotranspiration using Penman-Monteith method.
• Include all required mounting, calibration and power kits for sensors
Data Logger: Cambell CR1000M or similar
• Processor: CPU Drive: 50 MB serial flash, 2 MB flash, 7 MB RAM or greater.
• Analog Inputs: 16 single-ended or 8 differentials individually configured input channels or more. Range: in (mV) +/- 5000 to +/- 2.5, Resolution: in (µV) 1333 to 0.67.
• CPU Drive: 50 MB serial flash or greater
• Data Storage: 50 MB serial flash or greater
• Operating System: 2 MB flash
• Settings, Calibration, TLS Certificates and Key, System Information: 3 MB serial flash or greater
• Background Tasks and Table Information, Buffers, System Memory, Program Variables: 7 MB RAM or greater
• Program Execution Period: 100 ms to 1 day
• Resolution: 1 ms or lower
• Accuracy: ±3 min. per year or greater
Tipping Bucket Rain Gauge: Texas Electronics, TE525-5m TE525 or similar
• Closure time: 135 ms or faster
• Bounce settling time: 0.75 ms or lower
• Resolution: 1 tip
Solar Radiation Sensor: Cambell, CS305-ET or similar
• Spectral range: 300-1100 nm minimum
• Measurement range: 0 to 2000 W/m2 or greater
Humidity and temperature sensors: Cambell, HMP60-ETS or similar
• Temperature Range: -40-60 °C or greater
• Humidity Range: 0% – 100%
• Temperature Accuracy: ±0.6 °C or greater
• Humidity Accuracy: ±5 % (–40 °C to 0 °C), ±3 % (0 °C to 40 °C), for less than 90% humidity
Wind Speed and Direction: Cambell, MW 034B-ET
• Wind Speed Range: 0 to 75 m/s (0–167 mph) or greater
• Wind Direction Range: 0° – 360°
• Wind Speed Accuracy: Accuracy: <10.14 m/s: ±0.1 m/s (±0.25 mph)
≥10.14 m/s: ±1.1% of true speed or greater
• Wind Direction Accuracy: ±5° or better
Note all sensors must be compatible with the data logger and the mounting tripod and include all required mounting kits and power sources.
File details come from the government source that posted it. Updated .