TransPort PT878GC - Portable Ultrasonic Gas Flow Meter

Transport PT878GC Portable Gas Ultrasonic Flow Meter

The GE TransPort PT878GC brings clamp-on ultrasonic gas flow metering capability to the portable level. Designed for natural gas pipeline, compressed air, inert gas or any compressed gas applications, the new PT878GC has the ability to measure gas flow rates, log data to internal memory and export flow data to a PC.

The TransPort PT878GC flow meter is geared for short-term flow survey work for gas applications. It is especially useful for metering of erosive, corrosive, toxic, high-purity or sterile gases or in any application where penetrating the pipe wall is undesirable. Installation can take as little as 15 minutes and is extremely simple since no tapping or cutting of the pipe wall is required. In addition, installation can be performed without shutting down or otherwise interrupting the process since the meter clamps onto the existing pipe wall.



TransPort PT878GC Features

  • Noninvasive clamp-on transducers
  • Temperatures up to 230 degrees C
  • Velocity, volumetric, totalized actual and standard flow
  • 3/4 to 24 inch pipe size capability
  • Built-in datalogger for 100,000 measurements
  • Built-in ultrasonic pipe-thickness gage (optional)

The TransPort PT878GC clamp-on gas flowmeter is a complete ultrasonic flow metering system for measurement of most gases, including:

  • Natural gas
  • Compressed air
  • Fuel gases
  • Erosive gases
  • Corrosive gases
  • Toxic gases
  • High-purity gases
  • Air separation gases


Fluid Types Acoustically conductive gases with minimum pressure requirements. See Installation Requirements table.
Pipe Size Ranges
  • 0.75 to 12 in (20 to 300 mm) with TransPort PT878GC-01 electronics
  • 4 to 24 in (100 to 610 mm) and larger with TransPort PT878GC-02 electronics
Pipe Wall Thickness Thicker walled pipes require greater gas density. See Installation Requirements Table.
Pipe Materials All metals and plastics. No lined pipes.
Flow Accuracy (Velocity)
  • For pipes 6 in (150 mm) and smaller: ±2% to 5% of reading typical
  • For pipes over 6 in (150 mm): ±1% to 2% of reading typical
Accuracy depends on pipe size and other factors.
Repeatability ±0.2% to 0.5% of reading
Range (Bidirectional) See Installation Requirements Table.
Rangeability (Overall) 150:1
Specif ications assume a fully developed flow prof ile (typically 20 diameters upstream and 10 diameters downstream of straight pipe run) and flow velocity greater than 5 ft/s (1.5 m/s). Pipes 2 inches (50 mm) or less require a minimum of 10 ft (3 m) of continuous straight run without flanges, welds or coupling joints.
Measurement Parameters Standard and actual volumetric flow, flow velocity and mass flow


Flow Measurement Patented Correlation Transit-Time™ mode
Enclosure Submersible IP67
Dimensions Weight 3 lb (1.36 kg),
size (h x w x d) 9.4 x 5.5 x 1.5 in. (238 x 138 x 38 mm)
Display 240 x 200 pixel backlit LCD graphic display
Keypad 25-key, rubberized tactile membrane keypad
Internal Battery Rechargeable battery: 8 hours of continuous operation
Battery Charger Input 100 to 250 VAC, 50/60 Hz, 0.38 A
Memory FLASH memory, field-upgradable
Operating Temperature –20° to 55°C (–4° to 131°F)
Storage Temperature –40° to 70°C (–40° to 158°F) To ensure maximum battery life, storage temperature exceeding 35°C (95°F) is not recommended for more than one month.
Standard Inputs/Outputs
  • One 0/4 to 20 mA current output
  • One user-selectable pulse (solid state, 5 V maximum) or frequency (5 V square wave, 100 to 10,000 Hz)
  • Two 4 to 20 mA analog inputs with switchable power supply for loop-powered temperature or pressure transmitter
Digital Interface Infrared communication port for printer or PC interface Site-Parameter Programming
  • Menu-driven operator interface using keypad and “soft” function keys
  • Online help functions including pipe tables
  • Storage for saving site parameters
Data Logging
  • Memory capacity to log over 100,000 flow data points
  • Keypad programmable for log units, update times, and start and stop time
Display Functions
  • Graphic display shows flow in numerical or graphic format
  • Displays logged data • Extensive diagnostic parameters
European Compliance Battery-powered system complies with EMC Directive 89/336/EEC PT878GC Specifications

Clamp-On Ultrasonic Flow Transducers

Temperature Ranges
  • Standard: -40° to 130°C (-40° to 266°F)
  • Optional (overall range): -40° to 230°C (-40° to 446°F)
Transducer Materials Stainless steel and plastic
Mountings Portable gas-transducer clamping fixtures in polycarbonate carrying cases: • PCFG-1 for pipes smaller than 12 in (300 mm) in diameter • PCFG-2 for pipes larger than 12 in (300 mm) in diameter
Mounting Couplant CPL-16
Area Classifications
  • Standard: General purpose
  • Optional: Weatherproof Type 4 IP65
  • Optional: Explosion-proof Class I, Division 1, Groups C,D
  • Optional: Flameproof e II 2 G EEx md IIC T6–T3 (certification pending)
TransPort PT878GC electronics are designed for general purpose areas.
Transducer Cables
  • Standard: One pair of LEMO® coaxial transducer connectors with 25-ft (8-m) cables
  • Optional: 500-ft (154-m) extension cables available for most transducers

Thickness-Gauge Option

Transducer GE dual-element transducer
Pipe-Thickness Range 0.05 to 3 in (1.3 mm to 76.2 mm)
Pipe Materials Most standard metal and plastic pipe materials
Accuracy ±1% typical or ±0.002 in (±0.05 mm)
Thermal Exposure Continuous operation to 37°C (100°F); intermittent operation to 260°C (500°F) for 10 seconds followed by two minutes air cooling

Additional Options

  • Infrared, portable, thermal printer with rechargeable battery and 120 to 240 VAC power supply/recharger
  • Weight 13 oz (370 g), size 6.3 x 6.5 x 2.3 in (160 x 164.2 x 59 mm), print width 4 in (104 mm)
RS232-to-Infrared Infrared adapter plugs into any available serial port to give desktop PCs infrared capability

Descriptions English Français Italiano Español
C-RL Installation Guide C-RL Installation Guide
PT878GC Portable Gas Flowmeter User's Manual PT878GC Portable Gas Flowmeter User\'s Manual
TransPort PT878GC Portable Flowmeter TransPort PT878GC Portable Flowmeter TransPort PT878GC Portable Flowmeter TransPort PT878GC Portable Flowmeter TransPort PT878GC Portable Flowmeter