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  5. Nutrient Sensor Requirements Questionnaire
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Exit Survey
 
 
Dear Friends in the Water Monitoring Community:

The Center for Environmental Policy at American University is coordinating an effort by the Partnership on Technology Innovation and the Environment to accelerate the development, deployment, and adoption of affordable nutrient sensor technology.
In preparation for dialogue with manufacturers and developers, we are compiling a set of specifications and requirements. We would like to include input from current and future users of nutrient sensor data. It would help us greatly if you could give us your reaction to the draft specifications (technical, cost and system). We will share the results with you in advance of the dialogue this summer.

Please send any questions or comments to Anne Marsh, a member of the Partnership, at [email protected].
Thank you very much for your time and support. Please start with the survey now by clicking on the Continue button below.

 
 
 
 
Name
   
 
 
 
Position
   
 
 
 
Organization
   
 
 
 
City & State
   
 
 
 
Organization Type
 
Non-profit
 
Government
 
Corporate
 
Academic
 
 
 
Email Address
   
 
 
 
How would you use in situ nutrient data? Please indicate your primary purpose(s).
 
Monitoring
 
Research
 
Regulation
 
Other
 
 
 
Please complete the matrix for each of the nutrients in which you are interested. Columns are based on the following questions:
Lower LOD: What is the lowest concentration you would typically need to measure (mg/l)?
Upper LOD: What is the highest concentration you would typically have to measure (mg/l)?
Accuracy: What is the minimum accuracy you would need (% of reading)? In other words, how close does the measurement need to be to the “real” concentration? i.e. 10% (2.7-3.3 mg/l if the real concentration is 3.0mg/l)
Precision: What is the minimum precision you would need (% of reading)? In other words how close to one another do repeated measures need to be? Assuming 5-10 measures for each sample, what is the maximum amount of variably you would accept? i.e. 10% (repeat readings range 2.5-2.9, given average concentrations of 2.7).
Lower LOD (mg/l) Upper LOD (mg/l) Accuracy (% of reading) Precision (% of range) N/A
Nutrient
Nitrate + nitrite
Ammonium/ammonia
Total N
Soluble reactive phosphorus
Total P
 
 
Please complete the matrix for each of the nutrients in which you are interested. Columns are based on the following questions:
Aquatic system: What is the primary aquatic environment(s) in which you would use sensors? Please specify.
Depth range: At what depths would sensors be need to measure? (shallowest to deepest in m)
Salinity range: At what salinities would sensors need to function? (least to most saline in ppt)
Flow range: In what general flow environment would sensors be used? (lowest to highest approximate flow rate in cfs)
CDOM/turbidity: Is there likely to be significant CDOM and turbidity in the sensor environment? (yes/no)
Other: Are there other technical specifications that are useful for your needs? These can include interfering substances, expected levels of biofouling, etc.
Aquatic system (type) Depth range (x to x cm) Salinity range (x to x ppt) Flow range (x to x cfs) Significant CDOM/turbidity (yes/no) Other considerations N/A
Nutrient
Nitrate + nitrite
Ammonium/ammonia
Total N
Soluble reactive phosphorus
Total P