Product Features
- Up to one month Data logging
The sensor’s built-in memory function enables continuous measurement for as long as one month*––– just by leaving the probe submerged in the sample. Personnel need not to be present during the measurement process––– the data can even be captured by personal computers in remote locations.
*With measurements every 15 minutes. - Measurement at depths as low as 100 meters
With its superior durability and high pressure resistance, the newly developed sensor facilitates measurements as far as 100 meters below the water surface. Thus, in addition to rivers, lakes and other shallow bodies, high-precision measurement can now be readily obtained ––– and water quality can be monitored ––– at dams, and even in the open sea. - Simultaneous measurement of 13 parameters
With the W-23XD unit (only), simultaneous measurements of up to 13 parameters (from pH, dissolved oxygen, and conductivity to seawater specific gravity and a variety of ions) can be obtained ––– much more quickly and easily than with conventional instruments. With its powerful measurement capabilities. - System enables GPS and numerous other data processing mechanisms
System capabilities can be greatly increased by installing the Global Positioning System (GPS), supplied with unit U-2002. GPS allows measurement of location and time, in addition to water quality, and enables main unit screen display of the obtained data ––– an indispensable function for maintaining detailed records. With the acquired longitude, latitude and depth data, subject locations can be mapped in 3-D.
Product Specifications
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W-22XD |
W-23XD |
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Control Unit |
Water proof construction |
IP-67 |
• |
• |
Multi-Probe *1 |
Measurement temperature |
0~55°C |
• |
• |
Storage temperature |
-5~60°C |
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Measurement depth *2 |
to 100 m |
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Maximum probe size |
95 mm |
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Probe length |
430 mm |
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Continuous use *3 |
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 |
Measurment Principle |
Glass electrode method |
• |
• |
Range |
pH 0~14 |
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Resolution |
0.01 pH |
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Repeatability |
±0.05 pH |
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Accuracy |
±0.1 pH |
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Dissolved oxygen |
Measurment Principle |
Diaphragm galvanic battery method |
• |
• |
Range |
0~19.99 mg/L |
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Resolution |
0.01 mg/L |
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Repeatability |
±0.1 mg/L |
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Accuracy |
±0.2 mg/L |
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Conductivity |
Measurment Principle |
4 AC electrode method |
• |
• |
Range |
0~9.99 S/m |
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Resolution |
0.1%F.S |
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Repeatability |
±1% |
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Accuracy |
±3% |
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Salinity |
Measurment Principle |
Conductivity conversion |
• |
• |
Range |
0~4% |
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Resolution |
0.01% |
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Repeatability |
±0.1% |
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Accuracy |
±0.3% |
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Total Dissolved Solids (TDS) |
Measurment Principle |
Conductivity conversion |
• |
• |
Range |
0~100 g/L |
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Resolution |
0.1%F.S |
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Repeatability |
±2 g/L |
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Accuracy |
±5 g/L |
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Seawater specific gravity |
Measurment Principle |
Conductivity conversion |
• |
• |
Range |
0~50 δt |
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Resolution |
0.1 δt |
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Repeatability |
±2 δt |
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Accuracy |
±5 δt |
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Temperature |
Measurment Principle |
Thermistor method |
• |
• |
Range |
0~55°C |
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Resolution |
0.01°C |
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Repeatability |
±0.3°C |
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Accuracy |
±1.0°C |
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Turbidity |
Measurment Principle |
Penetration and scattering method |
• |
• |
Range |
0~800 NTU |
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Resolution |
0.1 NTU |
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Repeatability |
±3% |
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Accuracy |
±5% |
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Water depth |
Measurment Principle |
Pressure method |
• |
• |
Range(NTU or mg/L) |
0~100m |
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Resolution |
0.1 m |
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Repeatability |
±3% |
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Accuracy |
±5% |
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Oxidation reduction potential(ORP) |
Measurment Principle |
Platinum electrode method |
• |
• |
Range |
±1999 mV |
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Resolution |
1 mV |
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Repeatability |
±5 mV |
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Accuracy |
±15 mV |
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Ion |
Measurment Principle |
Ion electrode method |
– |
• • • |
Resolution |
0.1%F.S |
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Repeatability |
±5% |
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Accuracy |
±10% |
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Nitric acid ion |
Range |
NO3–: 0.62~62,000 mg/L(pH 3~7) |
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Chloride ion |
Cl–: 0.4~35,000 mg/L(pH 3~11) |
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Calcium ion |
Ca2+: 0.4~40,080 mg/L(pH 5~11) |
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Fluoride ion |
F–: 0.02~19,000 mg/L(pH4~10:20 mg/L) |
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Potassium ion |
K+: 0.04~39,000 mg/L(pH5~11:3.9 mg/L) |
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Ammonia |
NH3: 0.1~1,000 mg/L(pH 12 or more) |
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Simultaneously measurable parameters |
|
|
10 |
13 |
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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