Improved Paddlewheel Life

Improved paddle life on all Digi-Meter paddlewheel flowmeters

After months of testing different material combinations and mating part tolerances, we’ve been able to drastically improve our paddle and axle life over 200% (in some cases up to 400%).

The best part is, you can upgrade your existing Digi-Meter flowmeter without changing the K-factor. Just replace your existing paddle and axle with the new set, and your done.

See How to replace the paddle / axle.

Whenever the paddle or the axle needs replacing, Blue-White highly recommends you replace both.

The data collected over the past five years indicates that most paddle wear is caused in applications using DI (Deionized) water. DI water is known for being an aggressive fluid, sometimes called “hungry water.”

This test was conducted at our factory using DI water (conductivity of 5 micromhos). We maintained a DI water flow velocity that exceeds 25 feet per second! The test ran 24 hours per day 7 days per week.

Wetted Materials

Axle = PVDF (Kynar)
Paddle = PVDF (Kynar)
Body / Fitting = PVDF or Polysulfone or PVC or Stainless Steel
(depending on selected pipe fitting)
O-ring = Viton or EP (Viton is standard)

Micro-Flo – Low Flow Paddlewheel Flowmeter


  • Ideal for measuring flow on most metering pumps.

  • Programmable units of measure:
    Milliliter, Ounces, Gallon (US), Liter

  • Programmable rate units are measured in:
    Minute, Hour, Day

  • Display toggles between Rate and Total

  • Display options:

    • Meter mounted display (shown)

    • Panel mounted display, 6 ft. cable

    • Sensor only (no display), 6 ft. cable

  • Fitting Type:

    • 1/4″ OD tubing, PVDF

    • 1/8″ female NPT, PVC

    • 3/8″ OD tubing, PVDF

    • 1/4″ female NPT, PVC (shown)

Chem-Pro – C3 Series Diaphragm Metering Pump


  • Feed rates:

    • 42 Gallons Per Hour

    • 160 Liters Per Hour

  • Output pressures up to 175 PSI (12.1 bar)

  • Variable Speed Drive

  • Washdown (NEMA 4X, IP66)

  • Back-Lit LCD display

  • Large Double Ball Valve

  • Priming / Degassing Valve – Built-in

  • Diaphragm Failure Detection (DFD) – Built-in

  • Housing constructed of chemical resistant, powder coated 413 aluminum`

Digital Timer Controls – Diaphragm and Peristaltic Pump


  • 4 Digit LCD display with built in icons, such as:

    • On-Time, Total-Time, TFD, FVS, Alarm, Service…

  • Programmable timer:

    • From .1 second up to 200 Days

  • Accepts TFD and FVS sensors

  • 1 Amp relay – alarm output

  • Input Modes:

    • Manual, 4-20 mA, 0-10 VDC, Frequency, Pulses for batching operations.

  • 1 Shot Timer and Pulse Batch

New digital timer controls to be used on the C-1100E and A-100NE pumps.

Injection Fittings – Check Valve


  • Newly designed, extra strong with a superior seal.

  • Double seal

    • Ball check valve

    • Duckbill valve

  • Increased wall thickness for added strength

  • Includes duckbill to help prevent calcification

  • Tubing connection sizes

    • 1/4″ tube

    • 3/8″ tube

  • 1/2″ and 1/4″ male NPT for pipe installation

Flow meter – New Air Flow Ranges for Polysulfone Tube

New air flow ranges are now available for our popular Polysulfone Tube Flow meters.

Air flow ranges:

F-450 series (3/8″, 1/2″, and 3/4″ pipe)

  • 1 – 6 SCFM  /  2 – 10 M3/HR

  • 1 – 12 SCFM  /  2 – 20 M3/HR

  • 2 – 22 SCFM  /  2 – 36 M3/HR

Peristaltic pump tubing – Tygothane

Peristaltic pump tubing – Tygothane

Polyurethane tubing (Tygothane®) is now available on our A-100N Flex-Flo line of pumps


  • Excellent resistance to oils, greases and fuels

  • High tear resistance

  • Meets FDA criteria

Typical applications:

  • Food and cosmetic processing

  • Lubricant and degreaser dispensing

  • Coolant recovery systems