FLOWMETERS

CDI 5100 In-Line | CDI 5200 Small Pipes | CDI 5400 Large Pipes | CDI 25 Point-of-Use | CDI 6000

CDI 5100

CDI 5100

CDI 5200

CDI 5200

CDI 5400

CDI 5400

CDI 5450

CDI 5450

CDI 25

CDI 25

CDI 6000 Series

CDI 6200

Flowmeters Overview

CDI flowmeters represent a radical departure from conventional designs. The meter clamps around a pipe with its flow-sensing probes projecting into the pipe through drilled holes. The low cost of the meters makes them ideal for installation throughout an air distribution system.

All of our Flowmeters:

  • Install in minutes
  • Measure mass flow by thermal dispersion
  • Are CE certified and RoHS compliant
  • Have built-in LED displays

"...we found that CDI Meters provided a good flow measurement product that was economically suitable for my purposes. It was simple to install so it provided quick and accurate flow measurements from the digital readout. It is what I was looking for to achieve my goal of measuring how much compressed air flow each machine used."

Gregory Rhames, Verallia, Asset Reliability Manager & Energy Manager

Thermal Mass Flowmeters

Thermal mass flow meters employ a simple, direct method of measuring flow without imposing a significant pressure loss. They work by sensing the temperature of air in a pipe and the amount of heat required to maintain a heated sensor at a fixed temperature difference above the air temperature. The faster the air flows, the more heat is required. The heat requirement depends on the mass velocity of the air, so the meter is measuring the mass of the air going by rather than its volume. As long as the compressed air has been filtered to remove lubricating oil and dried to remove water droplets, thermal mass flowmeters provide accurate flow data independent of temperature and with little dependence on pressure.

Our Design

We separate the heated, flow-sensing element from the temperature-sensing reference element and place them in two probes that enter a pipe through small drilled holes. The probes are mounted in one or two rings, and the rings clamp around and seal to the pipe. Installation consists of drilling two holes, using a drill guide, and clamping the meter in place. Each meter is designed and calibrated for a specific type and size of pipe, so no adjustment or configuration is required during installation. The meters have large, bright LED displays, milliamp and pulse outputs, and optional wired or wireless serial outputs for networking.

Recommended Placement

To perform properly, our meters must be installed where the air is free of oil and water droplets; thus in a compressed-air system, they must be downstream of a dryer. They also must be installed with sufficient straight pipe upstream that the air will have a well-developed, uniform flow profile. A length equal to 20 times the pipe diameter is sufficient in most cases; more is recommended after long-radius elbows and other items that could distort or concentrate the flow. For additional application limitations, please refer to the data sheet for the meter.

Flow metering is useful and cost-effective at a range of locations in the typical compressed-air system. At the plant-wide level, it assesses compressor-room performance and plant-wide air-use efficiency and leakage. At the department level, it assigns responsibility for air usage and gives credit for progress in reducing air usage. At the point of use, it pinpoints leakage and inefficiency. Leading companies in several industries have found it cost-effective to install dozens or hundreds of meters at individual pieces of equipment and use them to determine where maintenance is required.

Flowmeter Options and Modifications

We can easily modify our standard flowmeters to accommodate various units of measure, various display features, wireless or wired communications, high-pressure applications, and calibration adjustments for non-standard piping or tubing.
 

Explore in detail our flowmeters below. In addition to flowmeters, we offer a variety of accessories and modifications.

  • CDI 5100 In-Line

  • CDI 5200 for pipes up to 1.5″

  • CDI 5400 for 2″ – 8″ pipes

  • CDI 5450 Hot Tap

  • CDI 25 Point-of-Use Flowmeters

  • CDI 6200 for pipes up to 1.5″

  • CDI 6400 for 2″ – 8″ pipes