HIP::Keck

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Notes from conversation with Mike, Ron, Colin, and Charlie

  • Calibration of sensors with Mike and Corrine's students early in the summer
  • Stilling well

Possible Commercial Product

http://store.pasco.com/pascostore/showdetl.cfm?DID=9&Detail=1&Product_ID=54417

Well Types

Stilling Well

http://nd.water.usgs.gov/gage/images/shedweb.jpg

  • A vertical pipe with a relatively small opening (intake) in the bottom. It is used in a gauge installation to dampen short period surface waves while freely admitting the long period waves; which can then be measured by a water level gauge sensor inside. See float well and protective well.
  • Used at gauging stations
  • YSI is local - Yellow Springs, OH
  • Pressure? Precise water level measurement technique. What locations?
  • Turbidity - [Hach] Nephelometers
    • Confident we can engineer.
    • Possibly build our own as cheaper alternative (fiber optics), engineering it ourselves.
  • Budgeted for 41 student weeks, or $4100 of supply money
  • Redox - Self cleaning? Not sure if it's worth it. Research it.

Sensors

  • Determine required sensitivity and periodicity for each sensor.
  • Mike said that sensitivity should be secondary to ruggedness and cost because the sensitivity that we are looking for is not high and most sensors will meet our needs. Thus, our approach should be to find sensors that we think will work and then send him the specs for him to OK.
  • A selection of sensors from Hydrolab.

All-in-one Units, "Sondes"

  • Most use batteries as the primary power source.
  • Most have other features and sensors not listed in the matrix.
Sonde Matrix (Incomplete, more rows and columns to be added)
Make Model Temp pH Redox (ORP) Cond Nitrate DO Sulfide Turbidity Specs Data Storage Power Interface Price
YSI Hydrodata 600 R y y n y n y n n no spec sheet -- --
YSI Hydrodata 600 XL y y y y n y n n pdf ?? External 12VDC RS232, SDI-12
YSI Hydrodata 600 XLM y y y y n y n n pdf 384K 4 AA batteries, external 12VDC RS232, SDI-12
YSI Hydrodata 6920 y y y y y y n y pdf 384K flash ROM Batteries, external 12VDC RS232, SDI-12
YSI Hydrodata 6820 y y y y y y n y pdf ?? Batteries, external 12VDC RS232, SDI-12
YSI Hydrodata 6600 y y y y y y y y pdf 384K 8 C batteries, external 12VDC RS232, SDI-12
Rickly Hydrological Company Datasonde 4A y y add-in y add-in y add-in add-in no spec sheet ?? Batteries RS232, SDI-12
Sutron 5600-0703 y y y y y y n y pdf ?? 4 or 8 AA batteries, 12VDC RS232, RS485, RS422, SDI-12
Campbell Scientific / Hach Environmental / Hydrolab DS5 ? y y y y y n y pdf 512 KB memory 8 C batteries RS 232, RS 485, SDI-12
Campbell Scientific / Hach Environmental / Hydrolab DS5X ? y y y y y n y pdf 512 KB memory 8 C batteries RS 232, RS 485, SDI-12
Campbell Scientific / Hach Environmental / Hydrolab MS5 ? y y y y y n y pdf 512 KB memory 8 AA batteries RS 232, RS 485, SDI-12

Water Temperature

  • Colin

RTP - Ruggedized Wide Range Temperature Probe

  • 9 or 12 bit resolution
  • 12 foot CAT 5 cable
  • Dallas Semiconductor DS18S20 or DS18B20 sensors
  • uses 1-Wire communication protocol

The RTP temperature probe is designed for wide temperature range applications requiring excellent chemical resistant properties and sensor submersion.

pH

  • Jeff

Redox Potential

  • Mikio

Conductivity

  • Maduna

Nitrate Levels (NO3?)

  • Bryan

Dissolved Oxygen

  • Jeff

Sulfide Concentrations

  • Colin

Turbidity

  • Jeff
  • Mike says that we could build a turbidity sensor using LEDs and fiber-optic cables without too much difficulty. He is willing to help with construction if necessary. However, we both agreed that finding an assembly that meets our need would probably be the first course of action.

Batteries

  • Heating and cooling.

Enclosures

Solar Panels

SBCs

  • Power over ethernet? not supported by TS or Gumstix.
  • Heating and cooling.

Gumstix

  • Bryan

Technologic Systems

  • Colin
Embedded Arm Product Matrix
SBC Type DIO lines A/D Converter Price
TS-7200 ARM 20 8 ch. 12-bit (opt) $149.00
TS-7250 ARM 20 5 ch. 12-bit $149.00
TS-7260 ARM 30 & XDIO* 2 ch. 12-bit $179.00
TS-7300 ARM 55 (35 XDIO) n/a $219.00
TS-7400 ARM 20 4 ch. 8 bit $129.00
TS-5500 x86 38 (IRQ) 8 ch. 8 bit $319.00
  • eXtended Digital I/O functionality including pulse-width modulation, quadrature and edge counting, and pulse timing with IRQ/DRQ support.
  • TS-DIO64 Digital I/O Board, which is a 8-bit PC/104 (standard format) peripheral board that provides 64 digital I/O points (32 inputs plus 32 outputs). Up to 4 TS-DIO64 boards may be installed into a single system, enabling up to 256 DIO points (128 inputs plus 128 outputs). The TS-DIO64 DIO functions are compatible with any PC/104 SBC including all the Technologic Systems ARM and X86 products.

Reference Material

KECK

TIES

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