Panametrics XMT868i Transit Time Flowmeter

  • Complete Ultrasonic Flow Metering System Non-intrusive measurement of flow on a range of applications from pure liquids to difficult gas-solid-liquid mixtures
  • Simple Setup, Installation And Maintenance Requires minimal maintenance and provides long-term, drift-free operation
  • Dual Channel Measurement Has the option of a second channel which allows flow measurement in two pipes or flow measurement at two points in the same pipe
Product Options


The XMT868i flow transmitter is a Transit Time flow meter, making it perfect for measuring flow in a range of applications, from pure liquids to even difficult gas-solid-liquid mixtures, which previously could only be handled by Doppler flow meters.

The XMT868i transit time flow meter also has the option of a second channel which allows flow measurement in two pipes, or flow measurement at two points on the same pipe. The second channel can also be configured at one point, for dual path measurement, to offer maximum accuracy. The flow transmitter can be used with wetted or clamp-on transducers, to offer either maximum accuracy or flexibility and convenience for the user. A range of pipe sizes can be worked on from 1/2" to 200" diameter pipes, as the transducers, flowcells are available in standard and custom configurations.

Features and Benefits

  • Pipe range 1/2" to 200" (1.27cm to 5.1m)
  • Flow range -40 to 40ft/s (-12.2 to 12.2m/s)
  • Accuracy (wetted transducers) better than 1% of reading with +/-0.2% repeatability
  • Accuracy (clamp-on transducers) better than 2% of reading with +/-0.5% repeatability
  • Single and dual channel options available
  • Optional data logging capabilities
  • Weather / explosion proof housing
  • Low power consumption
  • Six button keypad
  • Large integral display
  • Simple meter and transducer installation and set up
  • Velocity, volumetric and totalised flow
  • Economical non-intrusive flow measurement
  • Suitable for use in hazardous locations

Manufactured by: Panametrics
Model: Panametrics XMT868i Transit Time Flowmeter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Water and wastewater
Sewage treatment
Lubricating oils
Liquified natural gas (LNG)
Hydrocarbon liquids
Other liquids
Hazardous Area (ATEX)


Operation and Performance
Fluid Types Acoustically conductive fluids, including most clean liquids, and many liquids with entrained solids or gas bubbles. Maximum void fraction depends on transducer, interrogation carrier frequency, path length and pipe configuration.
Pipe Sizes - Clamp-on transducers: 0.5 in to 300 in (12.7 mm to 7.6 m) and larger
- Wetted transducers: 1 in to 200 in (25.4 mm to 5 m) and larger
Pipe Wall Thickness All metals and most plastics. Consult RS Hydro for concrete, composite materials, and highly corroded or lined pipes.
Flow Accuracy (Velocity) ±0.5% of reading (achievable with process calibration)
Typical Clamp-On Flow Accuracy (Velocity) - Pipe ID>6 in (150 mm): ±1% to 2% of reading
- Pipe ID<6 in (150 mm): ±2% to 5% of reading
Typical Wetted Flow Accuracy (Velocity) ±1% of reading
Accuracy depends on pipe size, installation and whether measurement is one-path or two-path.
Repeatability ±0.1% to 0.3% of reading
Range (Bidirectional) -40 to 40 ft/s (-12.2 to 12.2 m/s)
Rangeability (Overall) 400:1
Specifications assume a fully developed flow profile (typically 10 diameters upstream and 5 diameters downstream of straight pipe run) and flow velocity greater than 1 ft/s (0.3 m/s).
Flow Measurement Patented Correlation Transit-Time™ mode
Enclosures - Standard: Epoxy-coated aluminum weatherproof Type 4X/IP66 Class I, Divison 1, Groups B, C & D; Class II, Groups E, F & G; Class III Flameproof II 2 GD EEx d IIC T5/T6
- Optional: Stainless steel
Dimensions Standard: Weight 10 lb (4.5 kg), size (h x d) 8.2 in x 6.6 in (208 mm x 168 mm)
Channels - Standard: One channel
- Optional: Two channels (for two pipes or two-path averaging)
Display Optional: two-line x 16-character backlit LCD display, configurable to display up to four measurement parameters in sequence
Keypad Built-in infrared, six-button keypad, for full functionality operation
Power Supplies - Standard: 90-260 VAC
- Optional: 12 to 28 VDC, ± 5%
Power Consumption 20W maximum
Operating Temperature -40°F to 140°F (-40°C to +60°C)
Storage Temperature -67°F to 167°F (-55°C to 75°C)
Standard Inputs/Outputs Two 0/4 to 20 mA isolated outputs, 600 S maximum load Namur NE043 compliant
Optional Inputs/Outputs All analog and digital I/O are available in specific combinations. Consult GE for available option cards.
- Two additional 0/4 to 20 mA isolated outputs, 1000 W maximum load
- Two 4 to 20 mA isolated inputs, 24-VDC loop power
- Two or four isolated, three-wire RTD (temperature) inputs, -148°F to 662°F (-100°C to 350°C), 100 S platinum
- Two or four pulse or frequency outputs, optically isolated, 3A maximum, 100 VDC maximum, 1W maximum, from DC to 10 kHz maximum
- Alarm relays
Digital Interfaces - Standard: RS232
- Optional: RS485 (multiuser)
- Optional: HART® protocol
- Optional: Modbus® protocol
- Optional: Foundation Fieldbus®
- Optional: OPC server
- Optional: Ethernet
Data Logging - Standard: None
- Optional: Memory capacity (linear and/or circular type) to log up to 150,000 flow data points
European Compliance System complies with EMC Directive 89/336/EEC, 73/23/ EEC LVD (Installation Category II, Pollution Degree 2) and transducers comply with PED 97/23/EC for DN<25