NAS-3-X

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Observatory reference: ESTOC[2014-****]

Standard: ESTOC

The NAS-3X is the latest version of the leading in-situ nutrient analyzer for high-frequency time-series determination of nutrient concentrations in marine and fresh waters. Four versions are available for the measurement of nitrate phosphate, silicate and ammonia.
The NAS-3X is typically deployed unattended for periods of 1 to 3 months, although much longer deployments can be achieved. The NAS-3X has also been used near surface in many buoy and riverine applications or moored at depths down to 250m.

Manufacturer

EnviroTech Instruments LLC
EnviroTech Instruments LLC

1517 Technology Dr
Chesapeake, VA 23320
USA

+1 (757) 549-8474

+1 (757) 410-2382

http://envirotechinstruments.com

Technical specifications

Depth rating250 m.
Max. pressure
Housing materialuPVC & polypropylene
Power supply12 volt DC (range 9.5 - 15.0 volts)
Power consumptionAnalysis: 285 mA / Sleep: 0.15 mA / Mean: 19 mA (for 8 weeks)
WeightAir: 31 lbs (14 kg) - Water: 12 lbs (5.5kg) Depth capability 100 m standard - 250 m optional - Deeper on
Size9.6” (246 mm) diameter x 31.4” (799 mm)
RangeµMol: Nitrate(0-10, 30, 60, 120,300); Silicate (0-10, 60); Phosphate (0-1, 3, 6); Ammonium (0-10, 0-50, 0-100)
Resolution(% range) Nitrate(2%); Silicate (3%); Phosphate (3%); Ammonium (1%)
Accuracy((µMol) Nitrate(0.05); Silicate (0.06); Phosphate (0.06); Ammonium (0.05)
Sample rate
Data interfaceRS232 - ASCII - 19,200 baud (N81) / 300 baud - 115.2 kbaud
CalibrationRS232 - ASCII - 19,200 baud (N81) / 300 baud - 115.2 kbaud

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