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Pocket-size pressure logger (DEFI2-DHG & DEFI2-D)

DEFI2-DHG & D
■Description
DEFI2-DHG and DEFI2-D are miniature pressure recorders (depth meters) for long-term observations (DEFI-D and DEFI-DHG are up to 573 days and 52 days respectively and for 1 minute interval observation). These two recorders can be used attached to fishing nets, underwater instruments and moorings. Also, AAA alkaline batteries used by DEFI-DHG and DEFI-D are easily available, reducing the operating costs.

*In order to measure sea level fluctuations, we recommend the installation of one unit for atmospheric pressure monitoring (atmospheric pressure compensation).

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Sensor Specifications

DHG D
Model DEFI2-D5HG DEFI2-D20HG DEFI2-D50HG DEFI2-D10 DEFI2-D20 DEFI2-D50
Parameter Pressure (Depth)
Sensor Semiconductor
Range
(*equivalent)
0 to 0.5MPa 0 to 2MPa 0 to 5MPa 0 to 1MPa 0 to 2MPa 0 to 5MPa
(0 to 50m)* (0 to 200m)* (0 to 500m)* (0 to 100m)* (0 to 200m)* (0 to 500m)*
Resolution
(*equivalent)
0.00005MPa 0.0002MPa 0.0005MPa 0.0001MPa 0.0002MPa 0.0005MPa
(0.005m)* (0.02m)* (0.05m)* (0.01m)* (0.02m)* (0.05m)*
Accuracy 0.3%FS 1.0%FS
Response time 0.05 s (90%)
Depth rating In accordance with depth range
Consumption
(DHG/D)
Approx. 25mA/30mA (during logging)
Weight 132g (in air) 72g (in water) including battery 98g (in air) 62g (in water) including battery
Dimensions Φ26mm×150mm Φ20mm×118mm

Logger Specifications

Communication Infrared to Interface unit
Output / transfer time RS-232C, 115,200bps / 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

Drawing

Drawing

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

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