U-50

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.

Segment: Process And Environmental

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

Specification		Basic value	Model
Specification		Basic value	U-51	U-52	U-52G	U-53	U-53G	U-54	U-54G
Sensor probe	Measurement temperature range	-10℃ to 55℃	✔	✔	✔	✔	✔	✔	✔
	Maximum sensor outer diameter	Approx. 96 mm
	Sensor length	Approx. 340 mm
	Cable length	2 m (standard) 10 m/30 m (options)
	Mass	Approx. 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 unit	Outer dimensions (W × D × H)	115 mm × 66 mm × 283 mm	✔	✔	－	✔	－	✔	－
	Outer dimensions (W × D × H)	115 mm × 66 mm × 335 mm	－	－	✔	－	✔	－	✔
	Mass	Approx. 800 g	✔	✔	✔	✔	✔	✔	✔
	LCD	320 × 240 mm graphic LCD (monochrome) with backlight	✔	✔	✔	✔	✔	✔	✔
	Memory data items	10000	✔	✔	✔	✔	✔	✔	✔
	Communication interface	USB peripheral	✔	✔	✔	✔	✔	✔	✔
	Batteries	C-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℃	✔	✔	✔	✔	✔	✔	✔

Specification		Basic value	Model
Specification		Basic value	U-51	U-52	U-52G	U-53	U-53G	U-54	U-54G
pH measurement Two calibration	Measurement method	Glass electrode method	✔	✔	✔	✔	✔	✔	✔
	Range	pH 0 to 14
	Resolution	0.01 pH
	Precision*²	±0.1 pH
Dissolved oxygen measurement Salinity conversion (0 to 70 PPT,automatic) Automatic temperature compensation	Measurement method	Polarographic method	✔	✔	✔	✔	✔	✔	✔
	Film thickness	25 μm
	Range	0 mg/L to 50.0 mg/L
	Resolution	0.01 mg/L
	Precision*²	0 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	✔	✔	✔	✔	✔	✔	✔
	Range	0 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*²	1% of full-scale (midpoint of two calibration points)
Salinity measurement	Measurement method	Electrical conductivity conversion	✔	✔	✔	✔	✔	✔	✔
	Range	0 PPT to 70 PPT (parts per thousand)
	Resolution	0.1 PPT
	Precision	±3 PPT
TDS (total dissolved solid) measurement Conversion coefficient setting	Measurement method	Electrical conductivity conversion	✔	✔	✔	✔	✔	✔	✔
	Range	0 g/L to 100 g/L
	Resolution	0.1% of full-scale
	Repeatability	±2 g/L
	Precision	±5 g/L
Seawater specific gravity measurement σt, σ0, σ15 display	Measurement method	Electrical conductivity conversion	✔	✔	✔	✔	✔	✔	✔
	Range	0 σt to 50 σt
	Resolution	0.1σt
	Precision	±5σt

Specification		Basic value	Model
Specification		Basic value	U-51	U-52	U-52G	U-53	U-53G	U-54	U-54G
Temperature measurement	Measurement method	Platinum temperature sensor	✔	✔	✔	✔	✔	✔	✔
	Range	-10℃ to 55℃
	Resolution	0.01℃
	Sensor	Platinum 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
	Range			0 NTU to 800 NTU		0 NTU to 1000 NTU		0 NTU to 1000 NTU
	Resolution			0.1 NTU		0.01 NTU		0.01 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 method	－	－	✔	✔	✔	2 m: － 10 m, 30 m: ✔
	Range	0 m to 30 m
	Resolution	0.05 m
	Precision*²	±3 m
ORP (oxidation reduction potential) measurement	Measurement method	Platinum electrode method	✔	✔	✔	✔	✔	✔	✔
	Range	-2000 mV to +2000 mV
	Resolution	1 mV
	Precision*²	±15 mV