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

Bi-Rotor Positive Displacement Meter


The SMC ALBRPD flowmeter features two precisely machined rotating members known as helical rotors which rotate and mesh within the meter’s interior housing in order to form a measuring chamber of known volume which may be used to accurately determine volumetric flow rate as a funtion of the rotors’ velocity. The helical rotors’ motion is transmitted to the display via a sealed coupling & drive system that enables the display to provide accurate data for both flow rate and total accumulated flow. The unique helical rotor design provides a number of advantages over traditional gear-type PD meters including reduced pressure drop, the virtual elimination of down-stream pulsations, enhanced particle tolerance, and reduced maintenance. The advantages provided by the helical rotor make the ALBRPD an ideal choice for many applications including oil-in-water media and fluids with small ammounts of entrained solids.


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  • Superior accuracy – to 0.1% of reading over 30:1 turn-down
  • Uniform rotation means low pressure loss
  • No metal-to-metal contact provides for long service lifetime
  • Self-lubricating
  • Very low noise and vibration
  • Reduced number of parts reduces maintenance requirements
  • Rugged double case construction prevents loss of calibration due to changes in pressure or temperature
  • NIST traceable calibration certificate
Flow Range:up to 8800 GPM (2000 m³/hr)
Process temperature:-22 ~ 480°F (-30 ~ 250°C)
Line size:¼”-16″ (8-400mm) ANSI or DIN Flange
Operating pressure:max. 930 psig (64bar)
Body Material:Stainless Steel 304 and Carbon Steel
Enclosure Rating:NEMA 4 (IP 65)
Viscosity:0~20,000 cP
Working Temperature:104 ~ 176°F (40 ~ 80°C)
Display:rate, total, low flow cust-off, battery consumption
Working Humidity:< 90% @ 75°F
Current Output:4-20mA, (two wire system w/ 600Ω max loop load)
Digital Output:RS485/RS232 communication with Modbus RTU (powered by 24VDC±5% and <60mA)
User Parameters:K-factors, linear correction coefficeient, flowrate input signal section points, temperature and pressure compensation, set pulse output range, decimal adjustment, ect.
Communciation Baud Rates:User selectable (1200, 2400, 4800 or 9600)
Pulse Output:(24VDC±5%, VH≥20V,) VL<1V and output load < 200Ω)

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