Product Description
Measure and display up to 11 parameters simultaneously with newly designed control unit and sensor technology. The operator can select which parameters are to be displayed on the screen at any time. Intuitive software assures ease of use and operation efficiency. Experience the durability and performance of a water quality meter that exceeds your expectations in the field testing of groundwater and surface water applications.
Features
- Easy to read LCD display
- One-hand operation
- On-screen icon displays battery power, USB and probe unit connectivity
- Quick-connect connector (cable to control unit)
- Shock resistant cover
- Backlight display
- Minimum dissolved oxygen sensor maintenance with screw-on type membrane cap
- Chemical resistant materials of construction
- Optional ToupH pH electrode* that is difficult to break (* Prevents damage during maintenance)
- Field replaceable sensors
- All models have data logging capability (10,000 sets of data including date/time and site name) with USB connectivity to PC
- Latest calibration data/date can be viewed on the display at any time.
Complete Kit
Supplied as complete kit with control unit, probe assembly, all sensors, carry bag (backpack type), spare D.O. membrane, D.O. filling soln, D.O. spanner, pH reference soln, silicone grease, batteries, calibration beaker set, 500ml Auto-Cal soln, sponge brush, instruction manual.
Accessories
Please see accessories list for optional heavy duty carry case or USB cable and software for downloading stored data to a PC.
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U-51
|
U-52
|
U-52G
|
U-53
|
U-53G
|
|
pH
|
✓
|
✓
|
✓
|
✓
|
✓
|
|
Dissolved Oxygen
|
✓
|
✓
|
✓
|
✓
|
✓
|
|
Conductivity
|
✓
|
✓
|
✓
|
✓
|
✓
|
|
Salinity
|
✓
|
✓
|
✓
|
✓
|
✓
|
|
TDS(Total Dissolved Solid)
|
✓
|
✓
|
✓
|
✓
|
✓
|
|
Seawater specific gravity
|
✓
|
✓
|
✓
|
✓
|
✓
|
|
Temperature
|
✓
|
✓
|
✓
|
✓
|
✓
|
|
Turbidity (LED)
|
—
|
✓
|
✓
|
—
|
—
|
|
Turbidity (Tungsten lamp)
|
—
|
—
|
—
|
✓
|
✓
|
|
Water depth
|
—
|
—
|
✓
|
✓
|
✓
|
|
ORP (Oxidation Reduction Potential)
|
✓
|
✓
|
✓
|
✓
|
✓
|
|
|
GPS
|
—
|
—
|
✓
|
—
|
✓
|
Sensor Probe
|
U-
51
|
U-
52
|
U-
52G
|
U-
53
|
U-
53G
|
|
Max.items displaying simultaneously
|
10
|
11
|
11
|
11
|
11
|
|
Measurement temperature
|
-10 to 55°C
|
|
|
|
Max. sensor diameter
|
Approx. 96mm
|
|
|
|
Probe length
|
Approx. 340mm
|
|
|
|
Cable length
|
Standard: 2m, Option: 10m,30 m
|
|
|
|
Mass
|
Approx. 1800g
(Approx. 3.97 Ibs)
|
|
|
|
Automatic calibration
(use pH4)
|
Applying to all models
|
|
|
|
Turbidity wiper
|
–
|
–
|
–
|
✓
|
✓
|
|
Measurement depth
|
Max. 30 m
|
|
|
|
Material contact with liquid
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PPS, glass, SUS316L, SUS304, FKM, PEEK, Q,Titaniumu,
FEP membrane, POM
|
|
|
|
Water resistance
|
JIS protection livel 8
|
|
|
Monitor
|
U-51
|
U-52
|
U-52G
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U-53
|
U-53G
|
|
|
Outer dimensions
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115(W) X 66(D) X 283(H) mm
|
|
|
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Mass
|
Approx. 800 g
(Approx. 1.76 Ibs)
|
|
|
|
LCD
|
320 X 240 liquid crystal display with backlight (black and white)
|
|
|
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Data memory
|
10,000
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|
|
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Communication
|
USB
|
|
|
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Battery
|
C batteries X 4
|
|
|
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Water resistance
|
JIS protection level 7 (when sensor cable is fitted)
|
|
|
|
Battery life
|
U-51, U-52, U-52G:
Approx. 70 hours
(without backlight)
U-53, U-53G:
Approx.500 measurements
|
|
Storage temperature
|
-10 to 60°C
|
|
|
|
Ambient temperature
|
-5 to 45°C
|
|
|
pH(All models in common)
- Two-point calibration
- Automatic temperature
|
Specification attribute
|
Specification value
|
|
Measurement principle
|
Glass electrode method
|
|
Range
|
pH 0 to 14
|
|
Resolution
|
0.01pH
|
|
Repeatability
|
±0.05pH
|
|
Accuracy
|
±0.1pH
|
Oxidation Reduction Potential (ORP)
|
Specification attribute
|
Specification value
|
|
Measurement principle
|
Platinum electrode method
|
|
Range
|
-2000 mV to +2000 mV
|
|
Resolution
|
1 mV
|
|
Repeatability
|
±5 mV
|
|
Accuracy
|
±15 mV
|
Dissolved Oxygen (DO, All models in common)
- Salinity conversion (0 to 70 PPT / automatic)
- Automatic temperature compensation
|
Specification attribute
|
Specification value
|
|
Measurement principle
|
Polarographic method
|
|
Range
|
0 to 50.0 mg/L
|
|
Resolution
|
0.01 mg/L
|
|
Repeatability
|
±0.1 mg/L
|
|
Accuracy
|
0 to 20 mg/L: ±0.2 mg/L
20 to 50 mg/L:±0.5 mg/L
|
Conductivity (COND, All models in common)
- Auto range
- Automatic temperature conversion (25°C)
|
Specification attribute
|
Specification value
|
|
Measurement principle
|
4 AC electrode method
|
|
Range
|
0 to 10 S/m (0 to 100 mS/cm)
|
|
Resolution
|
0.000 to 0.999 mS/cm:0.001
1.00 to 9.99 mS/cm: 0.01
10.0 to 99.9 mS/cm: 0.1
0.0 to 99.9 mS/m: 0.1
0.100 to 0.999 S/m: 0.001
1.00 to 9.99 S/m: 0.01
|
|
Repeatability
|
±0.05% F.S.
|
|
Accuracy
|
*±1% F.S.
(Median of two-point calibration)
|
Salinity
|
Specification attribute
|
Specification value
|
|
Measurement principle
|
Conductivity conversion
|
|
Range
|
0 to 70 PPT (permillage)
|
|
Resolution
|
0.1 PPt
|
|
Repeatability
|
±1 PPT
|
|
Accuracy
|
±3 PPT
|
Total Dissolved Solid (TDS)
- Conversion factor setting
|
Specification attribute
|
Specification value
|
|
Measurement principle
|
Conductivity conversion
|
|
Range
|
0 to 100 g/L
|
|
Resolution
|
0.1% F.S.
|
|
Repeatability
|
±2 g/L
|
|
Accuracy
|
±5 g/L
|
Seawater specific gravity
|
Specification attribute
|
Specification value
|
|
Measurement principle
|
Conductivity conversion
|
|
Range
|
0 to 50 δt
|
|
Resolution
|
0.1 δt
|
|
Repeatability
|
±2 δt
|
|
Accuracy
|
±5 δt
|
Temperature
|
Specification attribute
|
Specification value
|
|
Measurement principle
|
Thermistor method
|
|
Range
|
-10 to 55°C
|
|
Resolution
|
0.01°C
|
|
Repeatability
|
*±0.10°C (at calibration point)
|
|
Accuracy
|
JIS class B platinum thermometer sensor (±0.3+0.005 |t|)
|
Turbidity (TURB)
|
U-51
|
U-52
|
U-52G
|
U-53
|
U-53G
|
|
|
Measurement principle
|
–
|
LED
light
source
and
30°scattering
method
|
Tungsten lamp
source
and
90°scattering
method
|
|
|
Range
|
–
|
0 to 800 NTU
|
0 to 1000 NTU
|
|
Resolution
|
–
|
0 to 99.9 NTU: 0.1,
100 to 800 NTU: 1
|
0 to 9.99 NTU: 0.01,
10 to 99.9 NTU: 0.1,
100 to 1000 NTU: 1,
|
|
|
Repeatability
|
–
|
*±5% (reading) or ±0.5 NTU whichever is greater
|
±3% (reading) or ±0.1 NTU whichever is greater
|
|
|
Accuracy
|
–
|
±5% (reading) or ±1 NTU whichever is greater
|
0 to 10 NTU: ±0.5
10 to 1000 NTU: 3% (reading) or ±1 NTU whichever is greater
|
|
Water depth
|
U- 51
|
U-52
|
U-52G
|
U-53
|
U-53G
|
|
|
Measurement principle
|
–
|
–
|
Pressure method
|
|
|
Range
|
–
|
–
|
0 to 30 m
|
|
|
|
Resolution
|
–
|
–
|
0.05 m
|
|
|
|
Repeatability
|
–
|
–
|
±1% F.S.
|
|
|
|
Accuracy
|
–
|
–
|
±0.3 m
|
|
|
GPS
12 channel parallel (This is availalble for U-52G, U-53G.)
Note:
*Battery life based on continuous operation using alkaline C dry batteries when the monitor temperature is over 20℃ and the backlight OFF.
*Accuracy is measured by calibrating 4 points for turbidity and electrical conductivity and 2 points for all other measurements against standard solution.
*Repeatability is measured by the ability to reproduce the results against the standard solution (at 25℃ normal pressure condition).
