Horiba U-50 Series Water Quality Monitoring Systems

EPA method 180.1 turbidity design

For high sensitivity turbidity measurements and wiper system using the Model U-53 and Model U-53G.

Dissolved oxygen polarographic sensor

requires little maintenance and is easy to rebuild

Automatic one point calibration feature

Speeds calibration of pH, DO, conductivity, turbidity and water depth

All parameters are displayed on one screen.

On screen icons display battery power and GPS, USB and probe connectivity.

Backlight display and enlarged font capability.

Field replaceable sensors.

GPS capability.

Store as many as 10000 sets of data.

Measurement at a Drainage Ditch or Wharf

Instantaneously monitor, collect and store data while moving the submersed sensor probe unit

Measurement in Marshes

The control unit's waterproof design allows the user to work without concern of splashing or accidentally dropping the control unit in the water. The backlight display allows the user to take measurements in the dark.

Measuring Ground Water from an intake

With the sensor probe lowered and submersed at an intake, 10,000 data sets can be stored in the control unit and transfered to a PC later.

Measurements in Surface Waters

The long 30 meter cable option allows the user to deploy the sensor probe unit and collect measurement data at various depths. The GPS models facilitate environmental surveys of oceans, lakes and rivers.

Parameter	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 (Tangsten lamp)	—	—	—	○	○
Water depth	—	—	○	○	○
ORP (Oxidation Reduction Potential)	○	○	○	○	○
GPS	—	—	○	—	○
pH (mV)	○	○	○	○	○

Sensor Probe	U-51	U-52	U-52G	U-53	U-53G
Max items displaying simultaneously	9	10	11	10	11
Measurement temperature	-10 to -55°C
Max. sensor diameter	Approx. 96 mm
Probe length	Approx. 340 mm
Cable length	2m, 10m, 30m
Mass	Approx. 1800 g
Automatic calibration (use HORIBA 100-4)	Applying to all models
Turbidity wiper	–	–	–	○	○
Measurement depth	Max. 30 m
Material contact with liquid	PPS, glass, SUS316L, SUS304, FKM, PEEK, Titaniumu, FEP membrane, POM
Water resistance	JIS protection level 8
Control Unit
Outer dimensions	115(W) X 65(D) X 280(H) mm
Mass	Approx. 800 g (Without Batteries)
LCD	320 X 240 Graphic liquid crystal with backlight (black and white)
Data memory	10000 Data Sets
Communication	USB peripheral
Battery	C batteries x 4 ; CR2032 x 1
Water resistance	JIS protection level 7 (when sensor cable is connected)
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
Measurement principle	Glass electrode method
Range	pH 0 to 14
Resolution	0.01pH
Repeatability	±0.05pH
Accuracy	±0.1pH
Conductivity
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 mD/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)
Seawater Specific Gravity
Measurement principle	Conductivity conversion
Range	0 to 50 δt
Resolution	0.1 δt
Repeatability	±2 δt
Accuracy	±5 δt
Turbidity	U-51	U-52	U-52G	U-53	U-53G
Measurement principle	–	LED transmitting light source, 30° forward scattering method		Tungsten lamp transmitting source and 90° scattering method
Range	–	0 to 800 NTU		0 to 1000 NTU
Resolution	–	0.1 NTU		0.01 NTU
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 NTU 10 to 1000 NTU: 3% (reading) or ±1 NTU whichever is greater
Dissolved Oxygen
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
Salinity
Measurement principle	Conductivity conversion
Range	0 to 70 PPT (permillage)
Resolution	0.1 PPT
Repeatability	±1 PPT
Accuracy	±3 PPT
Total Dissolved Solids
Measurement principle	Conductivity conversion
Range	0 to 100 g/L
Resolution	F.S. 0.1%
Repeatability	±2 g/L
Accuracy	±5 g/L
Temperature
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 / 1°C)
Water Depth	U-51	U-52	U-52G	U-53	U-53G
Measurement principle	–		Pressure method
Range	–		0 to 30 m
Resolution	–		0.5 m
Repeatability	–		±1% F.S.
Accuracy	–		±0.3 m
Oxidation Reduction Potential
Measurement principle	Platinum electrode method
Range	-2000 mV to +2000 mV
Resolution	1 mV
Repeatability	±5 mV
Accuracy	±15 mV

Title	Description	Download
Horiba U-50 Series Manual	Operator's Manual
Horiba U-50 Series Datasheet	Datasheet