Transit Time Flow Meter

Transit Time Flow Meter

An ultrasonic transit-time flow meter is a high-precision, non-invasive device that measures fluid velocity by transmitting ultrasonic sound waves diagonally across a pipe, determining flow rate based on the time difference between upstream and downstream pulses.

To meet demanding industrial requirements, TBEL supplies both clamp-on fixed and portable units that eliminate pipe cutting and process shutdown. These meters deliver high accuracy without contacting the media or causing pressure drop, making them ideal for clean liquids like water, chemicals, and refined fuels across municipal, HVAC, and industrial process monitoring.

AVAILABLE BRANDS:

Pulsar (UK)
Nivus(Germany)

Description

Short Description & Specifications

Operating ParametersFor clean liquids in full pipes with less than 2% solids or gas bubbles
Flow Velocity Range±0.02 m/s to 12.2 m/s (±0.07 ft/s to 40 ft/s)
Accuracy±1% of reading from 0.46 m/s to 12.2 m/s (1.5 ft/s to 40 ft/s); ±0.0046 m/s (±0.015 ft/s) for velocities below 0.46 m/s (1.5 ft/s)
Repeatability±0.25%
Pipe Diameter (Recommended)15 mm to 1,200 mm (1/2 in to 48 in)
Pipe MaterialsAny metal or plastic sonic conducting material including carbon steel, stainless steel, ductile iron, concrete-lined ductile iron, cast iron, PVC, HDPE, PVDF, fiberglass, copper, brass, aluminum, and pipes with bonded liners including epoxy, rubber, and Teflon
Operating Frequency0.64~ 2.56 MHz
Power Supply220V AC 50 Hz | Optional: 24 V DC
Power Consumption10W (aaprox)
Analog OutputIsolated 4-20mA, 0-5 V, 1 kΩ load maximum
Control Relays2 Relays, form ‘C’ dry contacts rated 5 A SPDT; programmable flow alarm and/or flow proportional pulse | Optional: 4 additional (6 total), rated 5 A SPDT
Data LoggingBuilt-in 128 MB data logger with USB output and Windows software (capacity for approx. 26 million data points)
Enclosure RatingNEMA4X (IP 66) polycarbonate with clear, shatterproof cover
Operating Temperature (Electronics)-20 °C to 60 °C (-5 °F to 140 °F)
Operating Temperature (Sensors)-40 °C to 150 °C (-40 °F to 300 °F)
Transducer Mounting KitStainless steel track with pipe clamps, built-in ruler, and coupling tape
Transducer Cables7.6 m (25 ft); extendable up to 152.4 m (500 ft)
ApprovalsCE, FM Standard, Optional:  ATEX/IECEx Zone 0, Ex ia IIB T4 Ga

Features & Key Advantages

Versatile Transducer Options

Three easy-to-select transducer options covering 15 mm to 1,200 mm nominal pipe diameters.

Universal Pipe Compatibility

Transducers work seamlessly on all common metal and plastic pipe materials.

Non-Invasive Installation

Transducers simply strap to the outside of the pipe, causing zero wear and tear and requiring no system shutdown.

Expert Hardware Design

Standard mounting hardware allows even novice installers to perform expert-level setup easily.

Flexible Communications

Offers analog, pulse, and serial communication options tailored to meet specific application needs.

High-Capacity Logging

Standard 26 million point data logger with free Logging Software makes data management fast and easy.

Hazardous Area Certified

All transducers are fully approved for safe, reliable operation in hazardous locations.

Dedicated Staff Support

Easy-to-contact, knowledgeable staff available to assist before, during, and after installation.

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