Open Channel Flow Meter

Open Channel Flow Meter

An ultrasonic open channel flow meter is a high-precision, non-contact device that measures flow rates in flumes and channels by projecting sound waves toward the fluid surface to determine liquid depth and calculate volume. If the site condition is not suitable for the PMD installation then velocity sensor and level sensor combination can provide reliable flow measurement.

To meet demanding industrial requirements, TBEL supplies durable, weather-resistant units built for tough environmental conditions. These meters deliver high accuracy without contacting the media, making them ideal for wastewater management, irrigation channels, storm run-off, and industrial effluent monitoring.

AVAILABLE BRANDS:

Pulsar (UK)
Nivus(Germany)
XUDA(China)

Description

Short Description & Specifications

ApplicationClean water, Wastewater
Measurement TypeUltrasonic non-contacting, Contacting, Sensor
Measuring ElementsPMD Compatible, V-Notch Weirs, Rectangular/Trapezoidal Weirs, Flumes or Area Velocity Sensors
Measurement Range125 mm up to 50 m (0.41 ft to 164 ft)
Accuracy0.25% (can vary depending on sensor)
Resolution0.1% (can vary depending on sensor)
Operating Frequency20 kHz to 125 kHz (application dependent)
Beam Angle<5° to <10° (application dependent)
Processing TechnologyDATEM (Digital Adaptive Tracking of Echo Movement) for Ultrasonic & FMCW RADAR
Power Supply220 V AC (50 Hz) / 24 V DC
Power Consumption20 VA max (AC), 10 W max (DC)
Signal OutputIsolated 4-20mA / 0-20mA into 1 kΩ, Full Duplex RS232
Relays Output3x Relays
CommunicationsIsolated Modbus RS485, Profibus, HART
Data LoggingOpt. Micro SD slot & totalizer logs
Enclosure RatingIP 65, IP67, IP 68
Environmental Temperature-20°C to +45°C
 ApprovalsCE, UL, ATEX EEx m / EEx ia, FM/FMC approved

Features & Key Advantages

All-in-One Functionality

Ability to measure pump control, flow measurement, and volume measurement in one compact unit.

Versatile Measurement Tech

Supports Radar or Ultrasonic measurement technology, alongside PMD level, Flow, and Area Velocity sensors.

Built-In Volume Calculations

Integrated volume calculations derived from standard tank shapes or custom calibration curves.

Advanced Visual Display

Echo profiles and level trend graphs are clearly shown directly on the built-in display screen.

Data Storage & Expandability

Equipped with a 32 GB Micro SD Card slot for extensive data logging and parameter transfers.

Flexible I/O & Relays

Features 4 onboard relays assignable by type, standard mA Output, and RS485 Modbus/Profibus options.

Quick Setup & Configuration

Intuitive quick setup features allow easy and rapid programming of all device parameters.

Mounting Versatility

Designed for convenient installation with options for both Wall or Fascia Mount setups.

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