U-50

U-50 Multiparameter Water Quality Checker

Multi-parameter Water Quality Checker

Portable multiparameter water quality measurement

U-50 series Multi-parameter water quality checker enables to measure and indicate the monitoring result simultaneously up to 11 parameters with one unit. Tough & powerful design, considering user friendly field monitoring on site, such as rive, ground water, drainage water, etc. bring together feature of  function and performance, which makes simple operation for everybody.

 

 

Division: Water Pollution
Manufacturing Company: HORIBA Advanced Techno Co., Ltd.

 

 

 Control Unit

 Control Unit Design for Field Operations

 

  • Auto-calibration feature provides hassle free calibration of pH, dissolved oxygen, conductivity, turbidity and depth.
  • Shock resistant cover designed for rough treatment in the field and is easily cleaned.
  • Cable can be easily connected and disconnected with quick-connect fitting.

 

 Data Management

 

  • Auto hold function freezes average data values on the screen to offer more time to verify or transcribe data.
  • Diagnostic functions notify the user of errors.
  • Integral USB connection for data transfer to a PC. USA cable is sold separately and includes software.
  • Selectable measurement units allow the operator to report data without the need to convert data to desired units of measure.

 

 Sensor Probe Unit

 Multiple Sensors Housed in Each Probe

 

  • Multiple sensors allow for the measurement of 11 parameters simultaneously (pH, pH(mv), ORP, DO, COND, Salinity, TDS, Seawater Specific Gravity, Temperature, Turbidity, Water Depth).
  • Turbidity sensor U-53 conforms to US EPA method 180.1. Precision has been improved over conventional instruments. The model U-53 high precision filed replaceable turbidity sensor with wiper has a resolution of 0.01 NTU.
  • Turbidity sensor of U-54 conforms to EN ISO 7027. The model U-54 has a resolution of 0.01 NTU.
  • Improved stability of the dissolved oxygen sensor has been achieved with a new 3 electrode design for fast response and polarographic sensor for ease of maintenance.
  • pH and ORP electrodes can be replaced individually to reduce replacement costs

 

 

SpecificationBasic valueModel
U-51U-52U-52GU-53U-53GU-54U-54G
Sensor probeMeasurement
temperature
range
-10℃ to 55℃
Maximum
sensor outer
diameter
Approx. 96 mm
Sensor lengthApprox. 340 mm
Cable length2 m (standard)
10 m/30 m (options)
MassApprox. 1800 g
Auto
calibration
function
Uses pH 4 standard solution.
Measurement
depth
30 m max.
Wet-part
materials*3
PPS, glass, SUS316L,
SUS304, FKM, PEEK, Q,
titanium, FEP membrane, POM
Waterproofing
standard
IP-68
Control unitOuter
dimensions
(W × D × H)
115 mm × 66 mm × 283 mm
115 mm × 66 mm × 335 mm
MassApprox. 800 g
LCD320 × 240 mm graphic LCD
(monochrome) with backlight
Memory data
items
10000
Communication interfaceUSB peripheral
BatteriesC-size dry cells (×4)
Waterproofing
standard
IP-67
GPS unit 
  • Reception method
    (12 channel parallel)
  • Measurement precision
    [With PDOP (high precision):
    30 m or less (2 drms)]
 
Estimated
battery life*1
70 hours (no
backlight)
500
measurements
(no backlight)
70 hours
(no backlight)
Storage
temperature
range
-10℃ to 60℃
Ambient
temperature
range
-5℃ to 45℃
SpecificationBasic valueModel
U-51U-52U-52GU-53U-53GU-54U-54G
pH
measurement
Two calibration
Measurement
method
Glass electrode method
RangepH 0 to 14
Resolution0.01 pH
Precision*2±0.1 pH

Dissolved
oxygen
measurement

  • Salinity conversion
    (0 to 70 PPT,automatic)
  • Automatic temperature
    compensation
 
Measurement
method
Polarographic method
Film thickness25 μm
Range0 mg/L to 50.0 mg/L
Resolution0.01 mg/L
Precision*20 mg/L to 20 mg/L: ±0.2 mg/L
20 mg/L to 50 mg/L: ±0.5 mg/L

Electrical
conductivity
measurement

  • Auto range
  • Automatic temperature
    conversion(25℃)
 
Measurement
method
Four-AC-electrode method
Range0 S/m to 10 S/m
(0 mS/cm to 100 mS/cm)
Resolution

0.000 mS/cm to 0.999 mS/cm:
0.001
1.00 mS/cm to 9.99 mS/cm:
0.01
10.0 mS/cm to 99.9 mS/cm: 0.1


0.0 mS/m to 99.9 mS/m: 0.1
0.100 S/m to 0.999 S/m: 0.001
1.00 S/m to 9.99 S/m: 0.01

Precision*21% of full-scale (midpoint of two calibration points)
Salinity
measurement
Measurement
method
Electrical conductivity
conversion
Range0 PPT to 70 PPT
(parts per thousand)
Resolution0.1 PPT
Precision±3 PPT

TDS (total
dissolved solid)
measurement

  • Conversion coefficient setting
 
Measurement
method
Electrical conductivity
conversion
Range0 g/L to 100 g/L
Resolution0.1% of full-scale
Repeatability±2 g/L
Precision±5 g/L

Seawater specific gravity measurement

  • σt, σ0, σ15 display
 
Measurement
method
Electrical conductivity
conversion
Range0 σt to 50 σt
Resolution0.1σt
Precision±5σt
SpecificationBasic valueModel
U-51U-52U-52GU-53U-53GU-54U-54G
Temperature
measurement
Measurement
method
Platinum temperature sensor
Range-10℃ to 55℃
Resolution0.01℃
SensorPlatinum temperature sensor,
JIS Class B ( 0.3 + 0.005 |t|)

Turbidity
measurement

Measurement
method
 LED forward
30°
transmission/
scattering
method
Tungsten lamp
90°
transmission
scattering
method
LED 90°
scattering
method
Range0 NTU to
800 NTU
0 NTU to
1000 NTU
0 NTU to
1000 NTU
Resolution0.1 NTU0.01 NTU0.01 NTU
Precision*2±5%of readout or ±1
NTU,
whichever is larger
 
  • ±0.5 NTU
    (for 0 NTU to 10 NTU
    measurement range)
  • 3% of readout or 1 NTU,
    whichever is larger
    (for 10 NTU to 1000 NTU
    measurement range)
 
±5%of readout
or ±1 NTU,
whichever is larger
Turbidity
sensor wiper
 
Water depth
measurement
Measurement
method
Pressure method2 m: -
10 m, 30 m:
Range0 m to 30 m
Resolution0.05 m
Precision*2±3 m

ORP (oxidation
reduction potential) measurement

Measurement
method
Platinum electrode method
Range-2000 mV to +2000 mV
Resolution1 mV
Precision*2±15 mV

*1:  Battery life is estimated under following conditions.

  • Continuous operation
  • Using batteries: C-size alkaline dry cells
  • Ambient temperature of the control unit: 20℃ or more
  • Backlight off

*2:  The precision is defined by measuring the standard solution in the following cases.

  • Turbidity and conductivity: after four point calibration
  • pH and DO: after two point calibration
  • Water depth and ORP: after one point calibration

*3:  Metallic parts are made of stainless steel. Immersing in seawater may erode metallic parts.

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