Questions and Answers.docx

Solicitation 12505B21Q0132, Soil Sensors

1. Please verify quantities required & will you need a base station or multiple base stations.

I need 12 profiling units total. In each profile 4 depths will be measured.

I have Campbell Scientific dataloggers (CR1000 or CR6), solar power systems and cellular data transmission for base stations. I prefer to use one base station but have two available if necessary.

Distances from the base station(s) to the measurement locations will be:

4 profiles @ 10 m 4 profiles @ 22 m 4 profiles @ 35 m

2. If base station is already installed & the only requirement is the sensors, please verify the type/mfr of base station. Are the sensors for use with analog data loggers or SDI-12?

Manufacturer is Campbell Scientific. SDI-12 is preferred to reduce power consumption.

3. With this information provided, I would also like to verify if a wireless solution will be acceptable. Please review Most Advanced Wireless Soil Monitoring Solution (soilscout.com).

There is not enough information provided on the website about measurement precision, stability over time, zone of measurement around the sensor, sensor durability, and power consumption to determine their suitability.

4. What are your power supply and signal output?

Power supply is a 20W solar panel and a 24AH battery.

Signal output type and power is configurable. Descriptions start at p. 229.

CR6 Product Manual (campbellsci.com)