Transmissor De Vazão Ultrassônico - Panaflow Z1g

The PanaFlow Z1G flow meter is the latest of a new generation of Panametrics ultrasonic flow meters. It is a single-path wetted meter designed specifically for accurate and dependable measurements in gas applications. Designed for well-head flow measurements, such as coal bed methane, bio gas or any gas with high levels of impurities, the Z1G is engineered to the highest levels of reliability and built to handle difficult process conditions.


Reliability by design

The Z1G flow meter utilizes Panametrics’ robust ultrasonic transducer technology proven in thousands of flare gas applications over three decades. Employing high powered transducers, the ultrasonic signal is capable of penetrating extreme fluid and process conditions, such as condensates, coal fines or pipe scale, to deliver a highly reliable, continuous flow measurement. Coupled with a rugged, industrial interface, the Z1G can be mounted in remote areas and withstand the harshest environmental conditions.


Advanced performance

The Z1G flow system couples a dependable, industrial-designed electronics to the cast meter body, providing a rugged, compact, and easy-to-use flow meter. By enclosing the transducers, cables, and junction boxes, the Z1G minimizes the possibility of environmental impacts or accidental user interference affecting the flow measurement. The cast body features no welds and highly accurate machined surfaces allowing the Z1G to provide accurate flow measurements even under low flow conditions. The Z1G flow meter features a high turndown ratio to reliably measure the flow rate which fluctuates over the lifecycle of the gas well.


Low cost of ownership

The ultrasonic technology on the Z1G provides a flow measurement with no pressure drop, no restriction in the pipe and no moving parts – eliminating impacts to the process or possible damage to the flow meter. Unlike traditional, non-ultrasonic type of flow meters, the Z1G allows you to monitor and optimize your production asset without the burden of an intensive maintenance and upgrade program. 



  • Highly reliable integrated flow system with cast flowcell
  • Ultra high powered transducers for high impurity gases
  • Field replaceable transducers for easy maintenance
  • No external cables
  • Ex d certified for hazardous installations
  • High pressure rating
  • Wide turndown ratio


  • Coal seam gas/Coalbed methane wellhead
  • Shale gas wellhead
  • Associated gas wellhead
  • Bio gas
  • Landfill gas or waste gas
  • Oil/gas separator
  • Wet gas
  • Vapor recovery
  • Wellhead flaring



Operation and Performance

Fluid Types Acoustically conductive gases
Flow measurement range (bi-directional).5 ft/s to 120 ft/s (.15 m/s to 37 m/s)
Flow Measurement Accuracy Specifications assume a fully developed flow profile, or minimally 20D upstream and 10D downstream
Standard Calibration: ±.075 ft/sec at flow range: .5 - 5 ft/sec


±1.5% of reading at flow range: 5 - 120 ft/sec

Extended Calibration: ±.075 ft/sec at flow range: .5 - 2.5 ft/sec


±1.5% of reading at flow range: 2.5 - 120 ft/sec

Repeatability ±0.2% to 0.5% of reading
Turndown Ratio 240 : 1 Specifications assume a fully developed flow profile
Meter Body ANSI Flange Ratings :150 lb. or 300 lb.


Meter Body Material Options : Epoxy Painted Carbon Steel, SA216 Gr. WCB Optional Stainless Steel, SA351 Gr. CF8M 

Pipe Sizes: 3”, 4” or 6”

Flow Measurement Patented Correlation Transit-TimeTM model
Measurement Parameters Mass flow, standard and actual flow, totalized flow, and flow velocity
Enclosure NEMA Type 4X explosion-proof and weatherproof (IP66) 


Standard: Epoxy-coated aluminum 

Optional: Stainless steel

Certifications US/CAN: Class 1, Div. 1 Group B,C,D 


ATEX: II 2 G Ex d IIB+H2 T6 IP66 

IEC: Ex d IIB+H2 T6 Gb IP66 

Display Standard: 2 line x 16 character backlit LCD display
Keypad Built-in Magnetic, six-button keypad operation
Input Power Standard: 90-250 VAC 


Optional: 12 to 28 VDC, ±5%

Operating Temperature –4°F to 176°F (–20°C to 80°C)
Power Consumption 20 W maximum
Standard Analog Inputs/Outputs Two 4 to 20 mA isolated outputs, 600 Ohm maximum load 


Two Alarms (NO/NC) 

One 4 to 20 mA input (pressure) 

One RTD input (temperature)

Digital Interfaces Standard: RS485 


Optional: HART®

Optional: Modbus®

Optional: Foundation Fieldbus®