Ocean and River Instruments

RINKO-FT (ARO-FT)

RINKO-FT
■Description
The RINKO FT not only retains the fast response time identical to that of conventional RINKO series but also has greater accuracy and stability by incorporating high-quality multipoint calibration and improved sensing method. This instrument is primarily designed to target Argo float operations,however, its compact, lightweight, and commonly used communication protocol widen the choice of platforms for installation. The RINKO FT allows DO measurements with a high vertical resolution, which will contribute to the understanding new aspects of physical/biochemical processes.

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Specifications

Measurement principle DO Phosphorescence
Temperature Thermistor
Range DO 1)Concentration: 0 to 425 μmol L-1
Air saturation: 0 to 200% (calibration range: 0 to 120%)
Temperature -3 to 45 ℃ (calibration range: 0 to 35 ℃)
Resolution DO 0.01 μmol L-1
Temperature 0.001 ℃
Initial accuracy DO ±2% of measured value or ±2.0 µmol L-1
Temperature ±0.01 ℃
Repeatability DO Time drift: ±5% of measured value per year or
±5.0 µmol L-1 per year.
2)Pressure effect: ±2% of measured value or
±2.0 µmol L-1
Temperature effect: ±2% of measured value or
±2.0 µmol L-1
Response time (63%)
(at 25 ℃, typical)
DO < 1 s (in water)
Temperature < 1 s (in water)
Representative output parameters DO in µmol L-1, Temperature in ℃, Engineering values of DO and temperature, Number of LED emission times, etc.
Sampling interval 1 s (shorter interval at request)
Pre-heat time 5 s
Communication UART (3.3 V logic) or RS-232C
Communication protocol Baud rate: 38400 bps, No parity, Handshake
AD Converter 16 bit digital conversion
Power 6 to 26 VDC, 12 VDC recommended
Current drain
(at 12 VDC, typical)
Sampling: 30 mA, Sleep mode: < 0.1 mA
Material Housing: Titanium, Insulating attachment: POM
Dimensions Φ30 146 mm with standard mounting attachment
Weight In air: 265 g with standard mounting attachment and 50 cm cable, In water: 162 g (design value)
Pressure rating 2000 dbar (higher rating at request)

1) Calculated from air saturation at 25 ℃ and 34 PSU.
2) Pressure hysteresis is not considered.

Drawing

Drawing

*All the specifications are subject to change without notice. Please contact us for more information.

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