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Water Quality Monitoring System
U-20XD Series
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U-22XD SET
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W-22XD
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W-23XD
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Control Unit
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Water proof construction
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IP-67
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( 
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option |
( 
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option |
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Multi-Probe *1
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Measurement temperature
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0~55°C
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(to30m)
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Storage temperature
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-5~60°C
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Measurement depth *2
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to 100 m
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Maximum probe size
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95 mm
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Probe length
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430 mm
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Continuous use *3
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30days
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Data logging
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Manual data memory (2880
items)
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Automatic calibration
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pH
*Two-point calibration
*Automatic temperature compensation
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Measurment Principle
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Glass electrode method
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(
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option |
(
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option |
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Range
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pH 0~14
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Resolution
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0.01 pH
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Repeatability
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±0.05 pH
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Accuracy
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±0.1 pH
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Dissolved oxygen
*Salt correction
(0 to 40 ppt /automatic)
*Automatic temperature compensation
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Measurment Principle
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Diaphragm galvanic battery
method
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(
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option |
(
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option |
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Range
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0~19.99 mg/L
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Resolution
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0.01 mg/L
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Repeatability
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±0.1 mg/L
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Accuracy
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±0.2 mg/L
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Conductivity
*Auto range
*Automatic temperature
conversion (25°C)
*SI units
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Measurment Principle
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4 AC electrode method
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Range
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0~9.99 S/m
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Resolution
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0.1%F.S
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Repeatability
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±1%
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Accuracy
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±3%
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Salinity
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Measurment Principle
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Conductivity conversion
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Range
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0~4%
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Resolution
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0.01%
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Repeatability
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±0.1%
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Accuracy
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±0.3%
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Total Dissolved Solids (TDS)
*Conversion factor setting
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Measurment Principle
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Conductivity conversion
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Range
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0~100 g/L
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Resolution
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0.1%F.S
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Repeatability
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±2 g/L
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Accuracy
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±5 g/L
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Seawater specific gravity
*Display  t,
0,
15
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Measurment Principle
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Conductivity conversion
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Range
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0~50 t |
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Resolution
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0.1 t |
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Repeatability
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±2 t |
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Accuracy
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±5 t |
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Temperature
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Measurment Principle
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Thermistor method
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Range
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0~55°C
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Resolution
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0.01°C
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Repeatability
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±0.3°C
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Accuracy
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±1.0°C
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Turbidity
*Unit selection
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Measurment Principle
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Penetration and scattering
method
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Range
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0~800 NTU
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Resolution
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0.1 NTU
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Repeatability
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±3%
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Accuracy
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±5%
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Water depth
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Measurment Principle
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Pressure method
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Range(NTU or mg/L)
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0~100m
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Resolution
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0.1 m
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Repeatability
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±3%
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Accuracy
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±5%
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Oxidation reduction potential(ORP)
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Measurment Principle
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Platinum electrode method
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(
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option |
(
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option |
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Range
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±1999 mV
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Resolution
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1 mV
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Repeatability
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±5 mV
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Accuracy
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±15 mV
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Ion
*Auto range
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Measurment Principle
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Ion electrode method
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-
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-
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(
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option (
)
option (
)
option |
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Resolution
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0.1%F.S
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Repeatability
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±5%
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Accuracy
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±10%
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Nitric acid ion
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Range
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NO3-:
0.62~62,000 mg/L(pH 3~7)
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Chloride ion
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Cl-: 0.4~35,000
mg/L(pH 3~11)
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Calcium ion
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Ca2+:
0.4~40,080 mg/L(pH 5~11)
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Fluoride ion
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F-: 0.02~19,000
mg/L(pH4~10:20 mg/L)
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Potassium ion
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K+: 0.04~39,000
mg/L(pH5~11:3.9 mg/L)
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Ammonia
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NH3: 0.1~1,000
mg/L(pH 12 or more)
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Simultaneously measurable parameters
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10
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10
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13
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Note: The accuracy rating value is obtained from
measurements at an intermediate point of the standard solution after
two-point calibration (at room temperature and pressure).
The repeatability and accuracy rating percentages are based on the
full scale (except for salinity).
*1: Organic solvents, strong acids, and strong alkaline solvents
cannot be measured.
*2: The maximum depth for ion measurements are 100 m for nitric
acid ion, chioride ion, fluoride ion, 15 m for calcium ion, ammonia,
and 3 m for potassium ion.
*3: Based on the data measured automatically at 15 minutes intervals.
The battery life taken into account.
Periodical maintenance and calibration is necessary when a lot of
shellfishes and seaweeds exist at the measurement point.
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