GE Sensing PanaFlow Z1G Data sheet

PanaFlow Gas Meter
System

Panametrics Ultrasonic
Flow Meters for Gas

The PanaFlow Gas Meter System is a
complete ultrasonic flow meter offering for
gas applications with a unique combination
of accuracy, rangeability, and reliability in a
robust meter design.

The PanaFlow Gas Meter System consists of
two models—the one-path PanaFlow Z1G and
the two-path PanaFlow Z2G. Both meters offer
a high-performance, yet affordable solution
for a variety of gas flow applications.

Applications

PanaFlow gas flow meters can be used in applications
such as:

• Biogas

• Natural gas production

• Vent gas

• Waste gas

• Shale gas

• Coal-seam gas wellhead

• Vapor recovery

• Fuel gas

Features & Benefits

Features Benefits

No drifting, no
periodic calibration
required

No pressure drop

No restriction in the
pipe

No filters or
strainers

Bi-directional
measurement

No moving parts

Explosion-proof
transducer design

Full ultrasonic
product line

No loss of process control, no
downtime, no expense from
calibration, and optimization
of assets.

No wasted energy from
running a pump or need to
purchase a larger size pump

Contamination will not
affect meter’s measurement
(drifting) or cause any
damage to meter

No maintenance cost

No additional meters
required

No loss of process control, no
downtime, no expense from
calibration, and optimization
of assets.

More power to transducers
at higher voltages, less risk of
attenuation in fluid

Meets more needs with
full product portfolio; one
manufacturer for ultrasonic
flow meters

Panametrics.com

Reliable Flow Measurement that is
Easy on Your Budget

The PanaFlow gas portfolio represents a new
generation of Panametrics ultrasonic flow meters.
Offered in one-path or two-path wetted versions,
PanaFlow gas meters bring together Panametrics
ultrasonic expertise with the benefits of ultrasonic
technology for affordable, high performance flow
measurement.

Unlike other flow measurement technologies, the
PanaFlow meters do not require maintenance since
they do not have any obstruction in the flow path to
clog the process line or moving parts to be damaged
by flowing gas. They provide years of trouble-free
operation with no adjustments, tuning or corrections.
PanaFlow gas meters provide a lower overall total
cost of ownership, superb reliability, and excellent
performance.

Designed for High Impurity Gas
Measurements

Each PanaFlow gas meter is a complete ultrasonic
flow metering system specifically designed for the
measurement of gases with high levels of impurities.
Engineered to the highest levels of reliability and
dependability, it is designed with an all-cast meter
body and high-accuracy machined surfaces. It has
no welds to adversely impact flow dynamics, making
possible high accuracy flow measurements, even at
low flow conditions.

Transit-Time Flow Measurement

In this method, two transducers serve as both ultrasonic
signal generators and receivers. They are in acoustic
communication with each other, meaning the second
transducer can receive ultrasonic signals transmitted
by the first transducer and vice versa.
In operation, each transducer functions as a
transmitter, generating a certain number of acoustic
pulses, and then as a receiver for an identical number
of pulses. The time interval between transmission and
reception of the ultrasonic signals is measured in both
directions. When the gas in the pipe is not flowing,
the transit-time downstream equals the transit-time
upstream. However, when the gas is flowing, the
transit-time downstream is less than the transit-time
upstream.
The difference between the downstream and upstream
transit times is proportional to the velocity of the flowing
gas, and its sign indicates the direction of flow.

Local or Remote Electronics

PanaFlow gas meters are offered with local or remote
electronics that are factory-installed on the meter
body or electronics that can be installed remotely
from the meter body. It is not recommended to locally
mount the electronics in applications above 185°F
(85°C). PanaFlow gas meters have robust electronics
functionality to meet your application needs.

Electronics ordered with a PanaFlow Gas Meter
System are programmed with setup information
based on your application, so the system is ready
to use as soon as the meter body is installed. When
local electronics are integrated with the system,
the transducer wiring is already complete, further
simplifying the field installation. When remote
electronics are used, transducer cabling must be run
between the flow meter system and the flow meter
electronics.

Transit time ow measurement

Proven Technology with Improved
Sound Isolation

A PanaFlow Gas Meter System employs similar robust
and reliable transducer technology used in thousands
of Panametrics flare gas applications around the
world. Ultra-high power transducers with enhanced
sound isolation are designed for conditions of extreme
condensate and impurities, and for continuous
operation even under the harshest of process
conditions.
The unique design ensures the highest field reliability
for continuous flow measurements over a wide range of
conditions.

High powered T18 transducers

Fast and Easy Installation

An integrated PanaFlow Gas Meter System is fast and
easy to install as all components are already installed
in the meter body. The system is factory assembled
and tested so it meets strict quality control standards.
A PanaFlow meter body is composed of a length of
pipe with flanged ends and transducer ports rated to
the application’s pressure requirements, so all the user
needs to do is bolt the end flanges into place in the
process pipeline.

Performance Specifications

Model Z1G Z2G

Number of Paths One Path Two Path

Flow Measurement Range (+/-)

2” (50mm) 0.5 to 250 ft/s (0.15 to 76 m/s) 0.5 to 250 ft/s (0.15 to 76 m/s)

3” (80mm) 0.5 to 250 ft/s (0.15 to 76 m/s) 0.5 to 250 ft/s (0.15 to 76 m/s)

4” (100mm) 0.5 to 250 ft/s (0.15 to 76 m/s) 0.5 to 250 ft/s (0.15 to 76 m/s)

6” (150mm) 0.5 to 250 ft/s (0.15 to 76 m/s) 0.5 to 250 ft/s (0.15 to 76 m/s)

8” (200mm) 0.5 to 200 ft/s (0.15 to 60 m/s) 0.5 to 210 ft/s (0.15 to 64 m/s)

10” (250mm) 0.5 to 170 ft/s (0.15 to 51 m/s) 0.5 to 180 ft/s (0.15 to 54 m/s)

12” (300 mm) 0.5 to 130 ft/s (0.15 to 39 m/s) 0.5 to 150 ft/s (0.15 to 45 m/s)

14” (350mm) 0.5 to 100 ft/s (0.15 to 30 m/s) 0.5 to 130 ft/s (0.15 to 39 m/s)

16” (400mm) 0.5 to 80 ft/s (0.15 to 24 m/s) 0.5 to 100 ft/s (0.15 to 30 m/s)

Meter Accuracy and Sensitivity - See Accuracy Notes below

Flow Velocity Accuracy from 5 ft/s (1.5 m/s) to Qmax - Note1

2” (50mm) to 16” (400mm) +-1.5% +-1%

Flow Velocity Sensitivity from 0.5 ft/s to 5 ft/s (0.15 to 1.5 m/s) – Note 1

2” (50mm) to 16” (400mm) +/- 0.075 ft/s (+/- 0.02 m/s) +/- 0.05 ft/s (+/- 0.015 m/s)

Repeatability – Notes 1 & 2

2” (50mm) to 16” (400mm) 0.5% of reading

Note 1:
Accuracy/repeatability specifications assume a final installation with fully developed flow profile (typically 20 diameters

upstream and 10 diameters downstream of straight pipe run), Reynolds Number > 5000 and single phase fluids.
Applications with piping arrangements that induce swirl (e.g., two out-of-plane elbows) may require additional straight
run and/or flow conditioning. For shorter straight pipe runs, consult the factory for a computational flow dynamic
evaluation.