Absolute Monitoring Technologies
STD / CTD Sensor and Recorder
Model SD204
SAIV AS STD/CTD Recorders

The SAIV A/S model SD204 measures, calculates and records sea water conductivity/salinity, temperature, depth (pressure) and sound velocity/water density. Three optional sensors can be added: disolved oxygen, fluorescence and turbidity.
Recorded data is in physical units and can be copied to a PC and presented immediately after the measurements have been completed.The software, SD200W, combines both the communications and versatile data processing functions. This makes the perfomance of the SD204 comparable to a much more volu,inous and expensive cable based STD system. On line reading by cable, and via telephone or satellite terminal is also possible.

SAIV A/S Model SD204 Specification

Conductivity
Range:
Resolution:
Accuracy:

Inductive cell
0 to 70 mS/cm
0.01 mS/cm
+/-0.02 mS/cm

Turbidity:
sensor type:
Ranges:
Linearity:

(Optional)
Seapoint
12.5,62.5, 250, 750 FTU
2%

Salinity:
Range:
Resolution:
Accuracy:

Calculated from C, T & D
0 to 40 ppt
0.01 ppt
+/-0.02 ppt

Real Time Clock:
Modes:

Intervals:

+/- 2 sec/day
STD/CTD with / without sound velocity
oxygen and optional sensors
1 sec to 180 min.

Temperature:
Range:
Resolution:
Accuracy:
Response time:


-2 to +40°C
0.001°C
=/-0.01°C
<0.5 sec

Memory:
capacity:
Data Output:


CMOS SRAM
58000 data sets of STD/CTD
RS232 ASCII code. 1200-9600 baud
1 start, 7 data, 1 stop, even parity
(real time recorded)

Pressure:
Ranges:
Resolution:
Accuracy:
Response time:


500, 1000, 2000,--6000*
0.01 dbar (m)
+/-0.02% FS
0.1 sec

Power:

2 ea.3.6V lithium C-cells.
Recommended type: SAFT LS26500/Electrochem BCX72C
Sufficient for 1.500.000 data sets

Sound velocity:
Range:
Resolution:
Accuracy

Calculated from S,T &D
1300 to1700 m/s
5 cm/s
+/-10 cm/s

Material:

Vacuum moulded polyurethane and 316 Stainless steel

Dissolved oxygen:
Sensor type:
Range:
Resolution:
Accuracy:

(optional)
SAIV205
0 to 20 mg/l
0.01 mg/l
+/-0.2 mg/l

Dimension:

Length400mm. Diameter 60mm

Fluorescence:
Sensor type:

Ranges:
Resolution

(optional)
Seapoint Chlorophyll/Rhodamine/CDOM

2.5, 7.5,25,75ug/l
0.03 ug/l

Weight:

In air: 2.5kg In Water: 1.3kg

Our philosophy of a commitment to customer satisfaction by providing premium quality products was and still is the driving force behind our success.

Providing working solutions to your data monitoring requirements in harsh, hostile environments.

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Last updated : 09/11/2008

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