GE AT868-2-1-1 Panametrics Ultrasonic Liquid Flow Transmitter

Liquid Flow Ultrasonic Transmitter

The AquaTrans AT868 Liquid Flow Ultrasonic Transmitter combines state-of-the-art

flow measurement capabilities with a low-cost transmitter package that can be

mounted directly at the process measurement point.

It can be installed directly at the process measurement point. It is designed for water

and wastewater applications in full pipelines.

The all-digital AquaTrans AT868 has no moving parts and requires minimal maintenance.

The on-board microprocessor utilizes patented Correlation Transit-Time™ technology for

long-term drift-free operation. Automatically adjusts to changing fluid characteristics and

dynamically configurable operating software simplifies programming.

Transit-Time Flow

Measurement Technology

Transit-Time technology uses a pair of transducers, each of which sends and receives a

coded ultrasonic signal through the fluid.

As the fluid flows, the signal transmission time in the downstream direction is shorter than

in the upstream direction; the difference in transmission time is proportional to the flow rate.

The AquaTrans AT868 measures this time difference and uses programmed pipe parameters

to determine flow rate and direction.

Wet or clamp-on sensors

Ultrasonic flow sensors are classified as wetted or non-wetted (clamp-on). Clamp-on sensors

are clamped to the outside of the pipe and do not come into contact with the process fluid.

Wetted sensors are mounted inside the pipe or flow meter and come into direct contact with

the process fluid.

Clamp-on sensors offer the greatest convenience and flexibility, as well as low installation costs,

compared to traditional flow metering technologies.

When properly installed, wetted sensors provide the highest accuracy (better than 1% of reading)

in most applications.

Dual Channel Models

An optional second channel measures flow in two pipes or the average of two paths on the same

pipe for improved accuracy.