Model FNW-522

Turbidity Monitoring Device (Stationary Type)

For CMT-10 Series Suspension Bracket Set

This device minimizes the impact of the suspended solids color on the measurement through the use of the transmitted/scattered light calculation method.
This method eliminates variations due to unevenness of the suspended solids. This device employs wiper-type automatic washing that operates every hour on the glass surface that uses an optical lens, completely removing dirt and air bubbles.

Features

Block diagram | Model FNW-522 Turbidity Monitoring Device (Stationary Type)

Measurement unit (water drop proof type) | Model FNW-522 Turbidity Monitoring Device (Stationary Type)

Turbidity and water temperature probe | Model FNW-522 Turbidity Monitoring Device (Stationary Type)

Transmitted scattered light method is not strongly affected by particle diameter or color
Light flux monitoring function performs self-control of light source intensity
The only light-concentrating system in Japan that uses an optical lens
Waterproof technology enables wipers to operate even at depths of 300 m
Wiper washing mechanism prevents filth from sticking to the device rather than removing it after it has already become stuck
Accuracy of ±2 NTU even for the normal river turbidity range
Thermistor enables water temperature accuracy of ±0.1˚C

Example of installation location

Example of installation location | Model FNW-522 Turbidity Monitoring Device (Stationary Type)

Specifications

Dimensions/Weight

Probe		Measurement Unit
Measurement Range: Turbidity	0 - 100 NTU, 100 - 1000 NTU	Measurement Averaging Time	2, 20, 40, 60 sec
Measurement Range: Water Temperature	-10.0 - 40.0˚C	Standard Output	For 0 - 1000 NTU, 4 - 20 mA or 0 - 1V (select)
Turbidity Sensing Method	Transmitted scattered light method	Power Supply	AC100V ±10% 50/60 Hz or DC12V
Water Temperature Sensing Method	Thermistor method	Required Power	Approximately 20 VA
Water Pressure Resistance	2.98 MPa (30kg/cm2)	Environment Conditions	Air temperature: 0 - 40˚C, Relative temperature: Under 90%
Protective Tube Material	SUS304	Paint	Panel surface: Munsell 5Y7/1 50G
Surface Treatment	Pickling	External Diameter	149 × 450 × 350 (Standard type)
Washing Device	Wiper-type automatic washing	Weight	Approximately 10 kg

Option

Many optional configurations are available for Model FNW-522.

We offer a range of suggested options depending on our customers’ installations and usage purposes.

Additional measurement items (DO, chlorophyll a, etc.)
2 - 3 point type by water depth
Handling for high turbidity or low turbidity
Powered by solar panels/batteries
Simple float type
Power-saving wireless data transmission