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Ultra highly
sensitive turbidity sensors have been launched. These sensors have
a resolution of 0.0002FTU and their zero point noise is within ±0.0005,
which allows accurate measurement in open sea and in deep sea where
it used to be hardly possible to measure.
In this model, newly developed sensors are integrated in the usual
data logger of Compact-series. Two types of models are now available
for shallow water with fouling removal wiper (ATU6W-CMP) and for
deep water with pressure-resistance of 6500m (ATU6-CMP).
Calibration is performed with formazine solution and their
concentration is shown in FTU unit.
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Specifications
| Instrument
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ATU6W-CMP |
ATU6-CMP |
| Parameters |
Turbidity
and battery voltage
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| Method |
Infrared
backscattering |
| Measuring
range |
0
to 10FTU or 0 to 10, 10 to 100FTU
(10-100FTU:option) |
| Resolution |
0.0002FTU
(0.002FTU for 10 to 100FTU) |
| Accuracy |
±0.002FTU
or ±2% of measured value |
| Communication |
RS-232C |
| Capacity |
179178
data |
| Memory |
2M
byte flash memory |
| A/D
conversion |
16
bit digital |
| Measuring
mode |
Continuous,
bust and real-time mode |
| Measuring
interval |
0.5,
1, 2, 5, 10, 15, 20, 30 seconds |
| Burst
time |
1
to 1440 minutes |
| Sample
numbers |
10,
15, 20, 30, 60, 120, 180, 240, 300, 600, 1200 |
| Warming
up time |
10
seconds |
| Power/Capacity |
"D"
lithium battery/14Ah |
"C"
lithium battery/7Ah |
| Current
consumption |
Measuring:50mA
Wake-up:10mA
Using wiper:450mA(Max) |
Measuring:90mA
Wake-up:10mA |
| Materials |
Housing:titanium
Optical sensor:epoxy resin |
Housing:titanium
Optical sensor:epoxy |
Weight
(incl. battery) |
1080g
in air
560g in water
|
800g
in air
480g in water |
| Pressure-resistance
|
200m
depth |
6500m
depth |
| Other |
Automatic
clearance
with wiper |
High
pressure
resistant |
Sensor structure
is different between models with and without wiper.
If optional range
is adopted, the resolution at 0 to 10FTU range remains unchanged.
This instrument is made on comparison calibration, using Alec standard
as reference. |
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