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M3902 Ultrasonic Flow Meter

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M3902 Ultrasonic Flow Meter

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Mitchell Part Number: DYJ-M3902LC

Availability: Typically In stock - Call if Urgent!

Regular Price: $5,960.00

Special Price: $5,899.00

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Quick Overview

Enhanced Doppler Ultrasonic Flow Meter - Will Work on any Solid Pipe or Tube 1/4” Diameter or Greater

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The M3902 Ultrasonic Flow Meter Features:

  • Employs doppler technology; the flowmeter uses piezo-electric transducers to transmit and receive an acoustic signal reflected off discontinuities in a liquid flow stream


  • This technology provides the following benefits:

  1. No cost installation- just strap transducer around outside of pipe

  2. Systems do not need to be shut down for periodic or portable measurement

  3. Chiller systems may be balanced in a fraction of the time

  4. Can be used on a range of liquids from waste streams to clean water systems

  5. Microprocessor allows simple calibrated set-up for pipe diameter so that the meter will readout in volumetric total, ie GPM

The doppler ultrasonic flowmeter utilizes a clamp-on, piezoelectric, trans-ducer to transmit ultrasound through a pipe wall and into a flowing liquid.  The ultrasonic signal is reflected from suspended solids or entrained gases drawn out of solution.  (Entrained gases are drawn out of solution by a hydraulic disturbance such as 90° elbow.)  A second transducer receives the reflected sound and the meter’s circuitry compares the transmitted and received frequencies.  If the liquid is moving, a frequency shift occurs which is proportional to fluid velocity.  The signal processor converts this frequency shift to fluid velocity and allows the rate to be displayed in a variety of user selectable units.


Meter Specifications:

Velocity:  0.5 - 20 FPS (0.15 - 6.08 MPS)
Outputs:  4 - 20 mA, 600 Ohms max isolated
Indicators:  Power, signal strength, flow analyzer, fault, over-range, read, low battery, charge
Display:  2 line x 20 character alphanumeric LCD
              (backlit).  Digit height 0.2” (5 mm), six-digit rate,
              eight-digit totalizer (resettable)
Units:  User configured
Rate US Metric:  FPS, GPM, MGD (MPS, LPM, M3/hr)
Totalizer US Metric:  Gallons (liters, M3)
Ambient Conditions:  -22 to 160F (-30 to 70°C)
    0 - 95% relative humidity, non condensing
Enclosure:  NEMA 4X, (IP-65) ABS with SS hardware. 11W x 17L x 8D”
Non-linearity (Accuracy):  ±2% full scale
Sensitivity:  0.4% of full scale
Repeatability:  ±0.4% of full scale
Response Time:  5 - 50 seconds, user configured, to 90% of value, step change in flow
Power Requirements:  Internal lead acid gel cell battery provides 8 hours of continuous operation.  AC charging:  (Std) 110/220 VAC 50/60 Hz ±5%

Transducer Specifications

Liquid Requirements:  25 ppm of 30 micron size* suspended solids or entrained gases (air). *Less than this minimum will require transducer mount downstream of a 90° elbow
Transducer to Transmitter Distance:  (Std) 20 feet (6.08 meters), retractable cord
Pipe Sizes:  (Std) 1 - 120” (25 - 1524 mm) Pipe ID (Opt) 0.25 - 1” (6 - 25 mm), Small Pipe Transducer
Housing Material: (Std) Aluminum with epoxy encapsulation (High Temp) Torlon™ with SS


Shipping Weight 25.0000
Power Supply Internal rechargeable lead acid gel cell battery
Manufacturer Dynasonics
Mitchell Catalog Number 7LM3902LC,8LM3902LC,9LM3902LC,WBM3902LC, KNOWURFLO

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