Ocean and River Instruments

Pocket-size PAR logger (DEFI2-L)

DEFI2-L
■Description
DEFI2-L is a high-precision photometer for long-term observations (up to 573 days for 1 minute interval observation). The cosine correction allows the sensor to have an excellent spectral sensitivity even when the light source is not directly above the sensor. Also, AAA alkaline batteries used by DEFI2-L are easily available, reducing the operating costs.

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Sensor Specifications

Model DEFI2-L
Parameter Light quantum
Sensor Photodiode
Range 0 to 5000 μmol m-2 s-1
Resolution 0.2 μmol m-2 s-1
Accuracy ±4.0%FS (0 to 2,000 μmol m-2 s-1)
Depth rating 500m
Consumption Approx. 30mA (during logging)
Weight 94g (in air),61g (in water) *including battery
Dimensions Φ20mm×110mm

Logger Specifications

Communication Infrared to Interface unit
Output / transfer time RS-232C, 115,200 bps / Approx. 22 min (fully recorded)
Storage medium Internal flash memory (8MB)
N. of samples Approx. 820.000 samples at maximum
AD converter 16 bit digital conversion
Measurement mode Continuous
Measurement interval 1 to 59 s, 1 to 60 min
Power AAA alkaline battery
Material Titanium (grade 2) / Communication window: polycarbonate

Sensor characteristics

Sensor characteristics

Drawing

Drawing

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

Ocean and River Instruments

  • JFE Advantech
  • Service and Support Phone:+81-798-66-1783 Fax:+81-798-66-1654
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