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Our goal is to provide a variety of choices for any flow measurement application at industry leading prices.

Cone Differential Pressure Meter


SmartMeasurement’s ACONE differential pressure flowmeter is designed for the harshest operating environments and the widest variety of fluids. This sensor consistently out-performs traditional ΔP devices and other major flow technologies. The ACONE’s enhanced performance is due to the shape and position of a fixed-cone inside of the flow body in relation to the ΔP measurement ports. The cone interacts with the flow, reshaping the fluid’s velocity profile and creating a region of lower pressure immediately downstream of itself. Two pressure taps are designed to measure the differential pressure between the static line pressure and the low-pressure zone created downstream of the cone. Flow is calculated by the Bernoulli equation of conservation of energy. The cone shape also acts as its own flow conditioner, fully conditioning any turbulence in flow due to limited upstream and downstream straight runs. The ACONE is a primary element – it may be used in conjunction with third-party differential pressure transducers or with pressure transmitters supplied by SmartMeasurement. It is available in sizes ranging from ½” to 120” with a number of available options for process connections and materials of construction. The ACONE’s high performance, combined with its wide array of available features and relative low cost make it a superior value versus other differential-pressure based flow measuring technologies.


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  • High accuracy and repeatability
  • Conditions flow before measuring
  • Minimal straight pipe requirements
  • Very wide selection of sizes – ½”~120″ (15~3000mm)
  • Lower pressure loss than most other flow measuring technologies
  • Can measure clean or dirty liquids, slurries, gases and steam
  • Low signal noise
  • Anti-fouling, non-clogging design
  • Will accommodate multiphase flows
  • Good particle tolerance; not sensitive to suspended contaminents
Process Connections: NPT, Flange, Wafer or Butt weld
Sizes: ½” ~ 120″ (15~300mm)
Measuring Range: Based on Re > 8000 for liquid, gas, & steam
Temperature: -320~1500°F (-168~850°C)
Pressure: up to 61,000 psig (420 Mpa)
Accuracy: Liquid ± 0.5% of reading; Gas & Steam ± 1.0% of reading Gas & Steam: ± 1.0% of reading
Turndown Ratio: Better than 10:1
Repeatability: ± 0.1% of reading
Flange Types: JIS 10K / JIS 20K / JIS 40K, ANSI 150# to ANSI 2500#, DIN PIN 10 to PN 40ANSI 150# to ANSI 2500#DIN PIN 10 to PN 40
Piping Requirments: 0-3Ф upstream and 0-1Ф downstream
Standard Beta Ratios: 0.45 through 0.85, special betas available
Weight: Wafer: 22~28 lbs (10 ~ 13 kg) to 12″ (DN300)Insertion: 33 lbs (15 Kg)
Signal Interface: RS232 & RS485, HART
Display Units: m³/h (standard)
Power Supply: 110/220 VAC or isolated 14~36 VDC
Data storage: EPROM storage up to 5 years

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