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Ultrasonic Open Channel Flow Meter

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Application of Ultrasonic Open Channel Flow Meter

The ULFM series Ultrasonic Open Channel Flow Meter is a remote version ultrasonic open channel flow meters (O.C.M.). It consists of two elements, a wall mounted host, which has a display and an integral keypad for programming, and a probe, which must be mounted directly above the surface to be monitored. Both of the host and the probe are plastic leak-proof structure. The ULFM series Open Channel Flow meter can be widely applied to the environmental protection, water treatment, irrigation, chemical, and other industries. We are open channel flow meter manufactures to provide robust and cheap open channel flow meter.


Features of Ultrasonic Open Channel Flow Meter

ULFM series Open Channel Flow Measurement instrument is capable of the following functions:


  • High detection accuracy, the flow meter measurement changes with 1mm, the accuracy of change in level is 1 mm;
  • Suitable for a variety of weirs and flumes, Parshall flumes (parshall flume flow meter), Right-angle triangle weir, Rectangular weir;
  • Open channel ultrasonic flow meter displays flow rate in L/S or M3/h;
  • Excellent anti-interference capability;
  • Clear display with enhanced 14 digit two line backlit LCD;
  • The cable length between probe and host up to 1000m;
  • The probe with leak-proof structure and IP68 protect grade;
  • Chemically resistant probe materials for maximum application flexibility;
  • Provided 4-20mA output and RS485 serial communication (MODBUS-RTU) output;
  • Provided programmable 6 relays at most for alarms;
  • Three button for programming or remote control for easy configuration and operation (opt.);


Ultrasonic Open Channel Flow Meter Technical data

The host Type

ULFM (host)

Power supply

DC24V (±5%) 0.2A; AC220V (±20%) 0.1A

Display

2 lines 14 digit backlit LCD

The instantaneous flow rate range

0.0000~99999L/S or m3/h

The maximum of cumulative flow

9999999.9 m3/h

Accuracy of change in level

1mm or 0.2% of measured distance from the probe at still water. (whichever is greater)

Resolution

1mm

Analogue output

4-20mA into 500 Ohms, corresponding to instantaneous flow rate.

Relays outputs

6 multi-function SPDT relays at most(optional), rated 5A /250VAC/30VDC, high, low and failsafe alarm and control corresponding to instantaneous flow rate or level.

Serial communication

RS485, MODBUS-RTU standard protocol

Ambient temperature

-40℃~70℃

Temperature compensation

Integral in probe

Pressure range

±0.1MP (press definitely)

Measure cycle

1 second (changeable )

Parameter setting

3 induction buttons / remote control

Cable gland

PG9 /PG11/ PG13.5

Material

ABS

Protect grade

IP67

Fix

Hang

Dimensions

248H*184W*122D(mm)



The probe Type

LB-4 (probe)

Open channel flow meter range

0.00-4.00m

Blind zone

0.20m

Ambient temperature

-40℃~70℃

Temperature compensation

Integral in probe

Pressure range

0.2MPa

Beam angle

10 (3db)

Cable length

10m standard (can be extended to 1000m)

Material

ABS, PVC or PTFE (optional)

Protect grade

IP68

Fix

Screw (G2) or flange (DN65/DN80/etc.)


Ultrasonic Open Channel Flow Meter Model Selection

HLFM

Power Supply


A

AC220V(±5%)

D

DC24V(±20%)

O

Others


Weir and flume Standard

I

ISO Standard

C

National Standard


Output

O

No output

1

4-20mA output


Communication

C0

No Communication

C1

RS485 Communication


Relay

R0

No

Rx

“x” represents the number of relays , max 6


Cable Length

L10

Standard 10 meters

Lx

“x” is the length, max 1000m


Protection Box for host

0

With protection box

1

Without protection box


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