High accuracy and low uncertainty in gas measurement with the Q.Sonic Max Ultrasonic Meter

Honeywell Elster combines the best of two worlds to deliver one excellent gas flow meter. The Q.Sonic Max Ultrasonic Meter delivers high measurement accuracy, cost effectiveness, and resistance to installation effects. A low level of uncertainty and high robustness means more individual operational demands are met.

The Q.Sonic Max Ultrasonic Meter utilizes a combination of reflection and direct paths which result in a detailed, accurate flow profile and superb noise immunity. Honeywell Elster leads the industry with a unique patented 8-path configuration in this meter. Internal pressure and temperature sensors along with advanced diagnostics and easy-to-use software ensure accurate calculation of the Reynolds number and dynamic correction of the meter body. Each component of the Q.Sonic Max works together to create a long-term reliable product.


Q.Sonic Max Ultrasonic Gas Flow Meter Features

  • The Q.Sonicmax offers unmatched performance
  • 8-path, reflective and direct technology
  • Flow profile detection with swirl and asymmetry measurement
  • Internal temperature sensor
  • Bi-directional measurement
  • OIML R137-1 2012 accuracy class 0.5
  • ISO 17089-1:2010
  • MID approved
  • AGA 9 compliant

Q.Sonic Max Ultrasonic Meter Specifications

Technical data
Measurement Principle
Ultrasonic transit time measurement
4” to 36”—larger sizes available upon request (DN 100 to DN 900)
Pressure Range
2 bar (g) (29 psig) to 150 bar (g) (2175 psig); minimum pressure depending on size and gas composition
Process Temperature Ranges
Standard: -40°C to +85°C (-40°F to +185°F)
Extended: -50°C to +85°C (-58°F to +185°F)
MID: -40°C to +85°C (-40°F to +185°F)
Ambient Temperature Range
Standard: -40°C to +70°C (-40°F to +158°F)
Extended: -50°C to +70°C (-58°F to +158°F)
MID: -40°C to +55°C (-40°F to +131°F)
Typical Uncertainty
0.5% of reading after dry calibration
0.2% of reading after flow calibration
0.1% of reading after flow calibration and linearization
Body Materials
Low-temperature carbon steel
Stainless steel
Other materials on request
Power Supply
Nominal 24 V DC (18-30 V DC), 10-20 W (depending on installed optional cards)
Local Display
GUI, 4.3″ (10.9 cm) widescreen graphical colour display with 7 capacitive soft keys (touch), LEDs for power and status
MID Accuracy
Class 1.0