Paddlewheel Flowmeter With Analog Output Provides Remote Communication

Paddlewheel Flowmeter With Analog Output Provides Remote Communication
The Digi-Meter Micro-Flo digital paddlewheel flowmeter with analog output from Blue-White Industries

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The Digi-Meter Micro-Flo digital paddlewheel flowmeter with analog output from Blue-White Industries displays flow rate and accumulated total flow. The meter features 4-20 mA/0-10 VDC circuitry for low-flow applications. Units include an NPN open collector output for communication with SCADA systems.

“These are used quite often in water treatment applications, process applications or anywhere you want to measure flow rate and obtain an output signal back to a PLC or a SCADA system for remote flow monitoring,” says David Koch, sales manager for Blue-White Industries. “In a wastewater treatment plant, if you’re dosing chemicals into a clarifier, you can measure what’s coming out of the metering pump.”

Connection options include 1/8-, 1/4- and 1/2-inch threaded and 1/4- and 3/8-inch O.D. tubing for smaller piping or tubing systems.

A clear PVC viewing lens allows for visual confirmation of flow with a PVDF chemical-resistant lens available.

The weather-resistant NEMA 4X meter is factory programmed or can be field programmed via the front panel touch pad. The panel has a lockout option for added security. The total reset function can also be disabled to prevent tampering.

“The Micro-Flo is a photo optic paddlewheel sensor equipped with a display,” Koch says. “There are six different units with different calibration ranges, 7,000 being the largest capacity. That unit would measure 700 to 7,000 mL/Min. The unit that goes down to 30 mL/Min has a range of 30 to 300, and there are four different units in between: 100 to 1,000 mL/Min, 200 to 2,000 mL/Min, 300 to 3,000 mL/Min and 500 to 5,000 mL/Min.”

The 1-pound meter has a maximum working pressure of 130 psig (PVC lens) or 150 psig (PVDF lens) at 70 degrees F. Maximum fluid temperature is 130 degrees F (PVC lens) and 200 degrees F (PVDF lens) at 0 psi. Input power requirements are 9-28 VDC with optional AC/DC transformers.

The six-digit (up to four decimal positions) LCD display includes operating mode and battery status.

“The display can give you rate of flow and lets you toggle to total display,” Koch says. “An accumulative totalizer counts the total number of units that can be reset to zero.”

User selectable or custom-programmable scale factors include flow (gallons, liters, ounces, milliliters) and time (minutes, hours, days). 714/893-8529; www.blue-white.com.



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