Installation example
This is an example of setting an underdrain channel. Use the mounting bracket to attach a combined

Ultrasonic Pulse Coherent Flowmeter

sensor to the bottom of the channel. Please contact us for various mounting methods.

High-precision flow measurement
based on the Ultrasonic Pulse Coherent method
H i g h a c c u r a cy m e a s u r e m e n tusing Ultrasonic Pulse Coherent
method.
More accurate by dividing thewater depth direction into cells
and measuring the flow velocity
distribution.

External Dimensions
CSW-10 Combined sensor of ﬂowvelocity and water level

Applicable to open channel,
closed ditch, non-full pipes, andfull pipes.

FM-10□ Transmitter

The data logger function is carried.

256
139

230

Easy setting with a web browser.

6.4

⏀180

4x

4-M5 for countersunk head screw

270

239

40

24140

Hole for fixing metal fittings

23.5

Transmitter

4.5

Water Level
M16

RJ45

4-M20216

Flow velocity*Speciﬁcations in this catalog are subject to change without prior notice due to product improvement.

Combined sensor of flow velocity
and water level

URL : https://www.jfe-advantech.co.jp/eng /Tokyo Office (Overseas Sales Department )JFE Kuramae Bldg. 2F, 2-17-4 Kuramae, Taito-ku, Tokyo
111-0051, Japan
Tel.+81-3-5825-5577 Fax.+81-3-5825-5591
Water Environment Division
3-48,Takahata cho, Nishinomiya, Hyogo,663-8202, Japan
Tel.+81-798-66-1502 Fax.+81-798-65-7025
EC-FM10-02A

23.06.0000 Ⓙ

Features

Speciﬁcations

One sensor measures flow velocity and water level.

■ CSW-10 Combined sensor offlow velocity and water level

Can be used in combination with an external water level gauge.

Flow velocity measurement

High accuracy measurement using Ultrasonic Pulse Coherent method.
High-precision measurement is possible by dividing the water depth direction
into cells and obtaining the ﬂow velocity for each water depth.
Suitable for all purposes. Applicable to open channel, closed ditch, non-fullpipes, and full pipes.
FM-10 is equipped with a large-capacity data logger function. It also has a setting sealing function.
CSW-10 has excellent environmental resistance because it has a structurethat does not contain electronic components inside the sensor.

This method measures the flow velocity and water level in the channel, and calculates the flow rate from the average flow velocity, ﬂuid cross-sectional area, and correction factor.
A combined sensor of flow velocity and water level is installed at the bottom of the channel to measure the flowvelocity and water level in the channel using a single sensor housing.
The flow velocity is calculated by transmitting a pair of time-staggered ultrasonic pulses into water, receiving areﬂected wave from a suspension in water, and determining the flow velocity from the arrival time diﬀerence of thereceived wave and the speed of sound in the fluid. (Ultrasonic Pulse Coherent method)
Furthermore, the water depth direction is divided into a maximum of 32 measurement cells, and ultrasonic pulse
pairs with a time diﬀerence are transmitted for each measurement cell to obtain the flow velocity, that is, the flow
velocity distribution for each measurement cell. And calculate the average flow velocity of the water depth direction.
The water level is calculated from the propagation time between the transmission of ultrasonic waves in the verticaldirection and the reception of ultrasonic waves reﬂected at the water surface.

■ Flow velocity distribution for each measurement cell
Up to 32 cells

Suspendedsubstancepulse 1
Flow velocityV=cΔt/2T

16
1514131211109876543
21

H：Ultrasonic for waterlevel measurement

pulse 2

Arrival time
diﬀerence：Δt

V：Ultrasonic for ﬂow
velocity measurement

Average ﬂow
velocity

Settings can be easily operated with a web browser
by connecting a personal computer.

Measuring cell

■ Ultrasonic Pulse Coherent methodSetting operation

Ultrasonic Pulse Coherent Flowmeter

Measuring range-5 to +5m/s

Measuring cell

Up to 32 cells (water level 0.1 to 1.0m)

Measuring accuracy±1.0% F.S.（flow velocity 1m/s or more)±0.6% F.S.（flow velocity less than 1m/s)

FM-10□ Transmitter

Speciﬁcations

Measurement method

Ultrasonic propagation time measurement method

Measuring range

0.05m to 1.00m

Measuring accuracy±2mm

CSW-10 Combined sensor
of ﬂow velocity and water leveltemp. ‑
temp. +Body

Material:Body stainless steel (SUS316L)
Transmission/reception side PEEK
Protection class：IPX8

W Level ‑Operating temperature range-15 to 50℃（no freezing allowed)

Velocity‑

Cable length
Cable outer diameter
Cable exterior material
Frequency
External dimensions
WeightW Level +Up to100m

Velocity+

10.0mm±0.3mm
Polyethylene

Shield1MHz180(W)×23.5(H)×40(D)mm

Approx. 0.4㎏ (excluding cables)*Due to the principle of measurement, the measurement may be affected bysuspended solids and air bubbles in the water. Please contact us for details.

Measurement principle

Pulse transmission
time diﬀerence：ＴSpeciﬁcations

Measurement method

Water level measurement

Device wiring diagram

Analog intput（4points）1
DC4 to 20mA+AⅠ1〜4Digital input（2points）1
Photocoupler isolated+DⅠ1,2■ FM-10□ Converter
Sensor1point : Combined sensor of flow velocity and water level1
Analog outtput（4points）
DC4 to 20mA

Analog input

4 points : DC4 to 20mA (input resistance 100Ω or less)AI1 and 2 can be set to a 2-wire water level gauge(DC4 to 20mA).
Supply voltage DC24V,max 200mA.

Digital output（4points）1
Rating DC60V, 1A

InputsDigital input
Outputs
Analog output

Item

2 points : Photocoupler isolatedInternal resistance 2kΩ (DC12 to 24V,max12mA)
Item
4 points : DC4 to 20mA（Allowable load resistance 550Ω）

Pulse output（2points）1
Non-voltage contacts
DC24V,0.5A

4 points : Non-voltage contacts DC60V, 1A
Digital output

LCD (4 lines 20 characters)

Data storage device

Built-in MicroSD card 16GB
Can be stored for 5 years (1 minute cycle)

Communication function

Ethernet 10/100 Mbps

Case

Mounting method : Wall-mounted type
Material : Body aluminum die castcover Polycarbonate resin
Protection class : IP66 equivalent

Operating temperature range-15 to 60℃

Power supply

FM-10A：85 to 264VAC,50/60Hz
FM-10D：DC9 to 36V Speciﬁed when ordering.

Power consumption

FM-10A：Approx. 27W
FM-10D：Approx. 12W

External dimensions

256(W)×270(H)×139(D)mm（excluding cable gland）

WeightApprox. 4.4㎏

□ Flow rate measurement accuracy
・± 3% to ± 6% of measured value
・The factory test result is ± 3% of the measured value.

‑DⅠ1,2+AO1〜4‑AO1〜4NO1〜4COM1〜4+DO1,2‑DO1,2LAN

2 points : Pulse output
Non-voltage contacts DC24V,0.5A

Display‑AⅠ1〜4

Power supply 85 to 264 VAC
50/60Hzor DC9 to 36VPortPNPE

Class D grounding 2

1:For details on input / output, refer to the instruction manual.
2:Be sure to connect the grounding terminal (PE) to ground potential.
(Class D grounding:ground resistance of 100Ω or less)