Full-Bore Measurement
The meter body provides an obstruction-free flow path without moving measurement components in the liquid stream.
EMAG Magnetic Flow Meter
The EMAG with its traditional flow tube design provides an economical alternative for those applications where some piping straight run or flow profiling is available.
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The Cadillac® EMAG Magnetic Flow Meter has been acknowledged as the industry standard for accuracy and electronics innovation.
The Cadillac® EMAG magnetic flow meter is capable of measuring liquids of all types and consistency while providing an obstruction free flow path. While the EMAG has a traditional flow tube/coil design the EMAG shares the same electronics platform as the CMAG. This provides the EMAG with the same electronics capabilities that enhance the CMAG’s performance and thus enhances the EMAG capabilities in a similar fashion. The result is a reduced flow profiling or piping straight run requirement in comparison to meters with the same flow tube design eliminating more than half of the piping straight run in comparison.
The EMAG with its traditional flow tube design provides an economical alternative for those applications where some piping straight run or flow profiling is available. With a common electronics platform shared with the CMAG, the EMAG has all the electronics features and options available as standard and an industry standard accuracy of +/- 0.50% of rate or reading. In any conductive liquid application the Cadillac® magnetic flow meter is the number one technology choice due to Cadillac® ’s accuracy, linearity, reliability and rangeability.
The Hot/Chilled Energy Water Flow Meter of Choice
With improved flow profiling requirements over traditional flow meters the EMAG makes an excellent choice for both Hot and Chilled water energy applications, where some piping straight run is available.The EMAG electronics capability allows retrofit areas with some flow profiling, without affecting the measurement accuracy. In addition, the EMAG has a turn-down of 100:1, which is suited for many applications with modulating flow rates that remain above 1 ft/sec.
The Water and Wastewater Industry Standard
With its improved flow profiling or piping straight run requirement the EMAG makes an optimal choice for both water and wastewater applications. With line sizes common above 16 inches the EMAG allows new designs to eliminate long piping straight runs in order to get an accurate and reliable flow measurement. This helps reduce the footprint of a building or other areas where the flow meters would be mounted. With increased wetted material selections most Water, including potable (NSF/ANSI 61 approvals), applications have also looked to magnetic flow meters as the preferred choice, especially in applications requiring analog (rate) or pulse (totalized) outputs.
Technical Product Guide
Cadillac® EMAG Magnetic Flow Meter
Explore the EMAG’s operating principle, applications, flow ranges, materials, electronics, dimensions, model structure and installation guidance for conductive-liquid measurement.
±0.50% Published Accuracy
Typical 100:1 Turndown
Full-Bore Flow Path
No Moving Parts
EMAG Series
Product Overview
The Cadillac® EMAG is a rate and totalizing magnetic flow meter designed to measure conductive liquids through an unobstructed, full-bore flow path. With no moving parts in the measured stream, it provides an alternative to mechanical and insertion-style flow technologies in suitable water, wastewater and industrial applications.
The EMAG combines a traditional flow-tube and coil arrangement with the same electronics platform used by the Cadillac CMAG. It is positioned as an economical magnetic-meter option for installations where some piping straight run or flow profiling is available.
Published Accuracy
Published performance is ±0.50% of the reading when the meter is properly selected and installed with suitable flow profiling.
Wide Operating Range
A typical 100:1 turndown supports systems with changing flow demands when the meter is correctly sized for the application.
System Integration
Integral or remote electronics can provide indication, totalization and configured outputs for monitoring or control systems.
Selection requirement: Magnetic flow measurement requires a conductive liquid and a full pipe. Fluid properties, operating range, materials, temperature, pressure and installation conditions must be reviewed before ordering.
Conductive-Liquid Measurement
Applications and Selection Benefits
The EMAG is intended for conductive-liquid services across energy, water and industrial systems. Final suitability depends on the liquid, expected flow range, process conditions, wetted materials and available piping configuration.
Typical Applications
- Hot and chilled water flow
- Hydronic and energy-management systems
- Cooling-tower water
- Potable and general water service
- Industrial and domestic wastewater
- Reclamation and clarifier water
- Aquifer injection water
- Process water and water-based coolant
- Water-based slurry
- Campus, district-wide and DCS monitoring
Application review: Confirm liquid conductivity, chemical compatibility, minimum and maximum flow, process temperature, pressure, grounding and the available piping arrangement before final meter selection.
Faraday’s Law
How the EMAG Measures Flow
The EMAG operates according to Faraday’s law of electromagnetic induction. When a conductor moves through a magnetic field, it produces a voltage proportional to its velocity. Inside the EMAG, the conductive liquid acts as that moving conductor.
By measuring the induced voltage and applying the calibrated meter factor, the electronics calculate the liquid velocity and convert it into volumetric flow.
Magnetic Field
Encapsulated coils generate a magnetic field across the full-bore flow tube.
Induced Voltage
Conductive liquid moving through the field generates a voltage proportional to its velocity.
Electrode Detection
A pair of electrodes detects the voltage produced across the flowing liquid.
Flow Calculation
The converter combines measured velocity, flow-tube area and the meter-specific calibration factor.
Rate and Total
The calculated flow can be displayed, totalized and transmitted through configured outputs.
Meter-Specific Calibration
Each meter’s K-factor is documented during a NIST-traceable flow test completed before shipment. This factor relates the detected voltage and liquid velocity to the meter’s calculated volumetric flow.
Conductivity Requirement
Published EMAG information specifies a minimum liquid conductivity of 3 µS/cm. Liquid compatibility, grounding, empty-pipe conditions and the actual process environment must also be considered.
Published Product Data
General Specifications
The following specifications consolidate the current EMAG product information and the published technical brochure. Final materials, electronics, approvals and performance conditions must be confirmed for the ordered configuration.
| Characteristic | Published Specification |
|---|---|
| Measurement principle | Electromagnetic flow measurement based on Faraday’s law |
| Flow path | Full-bore body with encapsulated and rigidly retained coils; no moving measurement parts |
| Published accuracy | ±0.50% of the reading with proper meter sizing, flow profiling and piping straight run |
| Typical turndown | 100:1 or better when correctly sized for the operating range |
| Minimum conductivity | 3.0 µS/cm |
| Published meter sizes | Model structure lists ½ inch through 12 inches; consult Cadillac Meter for larger sizes and current availability |
| Electronics | Integral or remote converter with instantaneous rate, indication and totalization |
| Analog output | 4–20 mA |
| Pulse output | Conditioned pulse; published brochure lists an open-collector output rated to 30 VDC and 200 mA maximum |
| Communications | Modbus RTU or Profibus PA listed as available options |
| Power supply | 100–240 VAC, 50/60 Hz; optional 24 VDC |
| Power consumption | Current product page lists approximately 19 W; confirm the requirement for the selected converter |
| Diagnostics | Empty-pipe detection with alarm or digital-contact capability |
| Calibration | NIST-traceable flow test and calibration certificate |
On smaller screens, swipe horizontally to view the complete table.
Specification control: EMAG documents have been issued at different dates. The quotation and project submittal should be treated as the controlling source for the final meter size, materials, electronics, power consumption, communications and approvals.
Preliminary Meter Selection
Flow Range and Wetted Materials
The published EMAG brochure lists the following minimum and maximum volumetric spans for the 4–20 mA output. These figures support preliminary sizing only. Final meter selection must be based on the actual minimum, normal and maximum operating flow.
| Nominal Meter Size | Published Minimum Span | Published Maximum Span |
|---|---|---|
| ½ inch | 0–0.25 GPM | 0–25 GPM |
| 1 inch | 0–0.75 GPM | 0–75 GPM |
| 1¼ inches | 0–1.25 GPM | 0–125 GPM |
| 1½ inches | 0–1.75 GPM | 0–175 GPM |
| 2 inches | 0–3 GPM | 0–300 GPM |
| 2½ inches | 0–4.75 GPM | 0–475 GPM |
| 3 inches | 0–6.5 GPM | 0–650 GPM |
| 4 inches | 0–10 GPM | 0–1,000 GPM |
| 5 inches | 0–17.5 GPM | 0–1,750 GPM |
| 6 inches | 0–25 GPM | 0–2,500 GPM |
| 8 inches | 0–50 GPM | 0–5,000 GPM |
| 10 inches | 0–70 GPM | 0–7,000 GPM |
| 12 inches | 0–100 GPM | 0–10,000 GPM |
| 14 inches | 0–120 GPM | 0–12,000 GPM |
| 16 inches | 0–160 GPM | 0–16,000 GPM |
| 18 inches | 0–200 GPM | 0–20,000 GPM |
On smaller screens, swipe horizontally to view the complete table. Consult Cadillac Meter for current availability above 12 inches.
Published Liner Options and Temperature Ranges
Polyurethane
−4°F to 140°FPublished for meter sizes from ½ inch through 16 inches.
FEP (Teflon)
−4°F to 212°FPublished for meter sizes from ½ inch through 10 inches.
PTFE (Teflon)
−4°F to 250°FPublished for larger meter sizes from 12 through 24 inches.
Electrode Materials
Published choices include 316L stainless steel and Hastelloy C. Confirm compatibility with the measured liquid.
Grounding Rings
Published choices include no grounding ring, 316 stainless steel, Hastelloy C or another material selected for the application.
Material selection: Temperature range alone does not establish compatibility. Confirm the liquid chemistry, concentration, temperature, pressure and expected service conditions before choosing the liner, electrodes and grounding-ring material.
2024 Published Guidance
Installation and Straight-Run Guidance
Cadillac Meter’s April 2024 comparison presents a general EMAG arrangement of 3 nominal pipe diameters upstream and 1 diameter downstream for the published ±0.50% accuracy.
This is materially shorter than the 10-diameter upstream and 5-diameter downstream arrangement used for the traditional magnetic flow-meter comparison in the same document.
Traditional Magnetic Flow Meter
Conventional straight-run arrangement shown in the 2024 comparison graphic.
10D Upstream
FLOW
METER
METER
5D Downstream
D = nominal flow-meter diameter.
Cadillac EMAG
General straight-run arrangement presented for the EMAG in the April 2024 comparison.
3D Upstream
EMAG
1D Downstream
Published as general guidance for ±0.50% accuracy.
Application-Specific Confirmation Required
The 3D-upstream and 1D-downstream arrangement is general published guidance. It does not replace a review of the actual piping system. Confirm the required straight run during meter selection whenever valves, elbows, tees, expanders, reducers, pumps, multiple disturbances or non-ideal flow profiles are located near the meter.
Installation Review Checklist
Full Pipe
Select an orientation and location where the meter tube remains completely filled during measurement.
Nearby Disturbances
Identify valves, bends, tees, transitions and pumps located upstream or downstream of the meter.
Grounding
Confirm the piping material, electrical grounding arrangement and whether grounding rings are required.
Service Access
Allow suitable clearance for the converter, wiring, inspection and future maintenance access.
ANSI Class 150 Configuration
Dimensions and Published Weights
The current EMAG product page publishes the following dimensions and weights for ANSI Class 150 configurations. Confirm certified dimensions, flange drilling and final shipping weight for the exact ordered meter before pipe fabrication or installation.
L1
Flange face-to-face length
L2
Pipe centerline to top of integral converter
L3
Published overall top-to-bottom dimension
| Meter Size | L1 Face-to-Face | L2 Centerline-to-Top | L3 Top-to-Bottom | Published Weight |
|---|---|---|---|---|
| ½ inch | 7.9 in | 8.1 in | 10.0 in | 20 lb |
| 1 inch | 7.9 in | 8.5 in | 10.9 in | 22 lb |
| 1¼ inches | 7.9 in | 8.7 in | 11.3 in | 25 lb |
| 1½ inches | 7.9 in | 8.9 in | 11.6 in | 28 lb |
| 2 inches | 7.9 in | 9.3 in | 12.3 in | 32 lb |
| 2½ inches | 7.9 in | 9.8 in | 13.2 in | 40 lb |
| 3 inches | 7.9 in | 10.0 in | 13.6 in | 47 lb |
| 4 inches | 9.8 in | 10.4 in | 14.5 in | 61 lb |
| 5 inches | 9.8 in | 11.2 in | 16.1 in | 80 lb |
| 6 inches | 11.8 in | 11.8 in | 17.3 in | 106 lb |
| 8 inches | 13.8 in | 12.8 in | 19.3 in | 145 lb |
| 10 inches | 17.7 in | 13.5 in | 21.4 in | 205 lb |
| 12 inches | 19.7 in | 14.5 in | 23.2 in | 318 lb |
| 14 inches | 21.7 in | 15.4 in | 25.0 in | 379 lb |
| 16 inches | 23.6 in | 16.5 in | 27.5 in | 465 lb |
| 18 inches | 23.6 in | 17.4 in | 29.6 in | 503 lb |
| 20 inches | 23.6 in | 18.3 in | 31.7 in | 590 lb |
| 24 inches | 23.6 in | 20.5 in | 26.2 in | 897 lb |
On smaller screens, swipe horizontally to view the complete table.
Fabrication warning: Do not use this summary table as a certified dimensional drawing. Obtain the approved project submittal for the exact meter size, converter arrangement, liner, flange configuration and selected accessories before finalising pipework or structural supports.
Published Configuration Codes
Model Number Structure
The published EMAG model structure identifies the meter size, converter arrangement, flange configuration, electrode material, liner, grounding-ring material and selected approvals. Use these codes as a configuration guide rather than a substitute for a current quotation.
| Code Group | Code | Published Description |
|---|---|---|
| Meter series | EMAG | Cadillac magnetic flow meter |
| Meter size | A | ½ inch |
| B | 1 inch | |
| C | 1¼ inches | |
| D | 1½ inches | |
| E | 2 inches | |
| F | 2½ inches | |
| G | 3 inches | |
| H | 4 inches | |
| I | 5 inches | |
| J | 6 inches | |
| K | 8 inches | |
| L | 10 inches | |
| M | 12 inches; consult Cadillac Meter for larger sizes | |
| Converter | II RC |
Integral converter with indicator/totalizer Remote converter |
| Meter body | F-150 | Flanged body, ANSI Class 150 |
| Electrode material | S H |
316L stainless steel Hastelloy C |
| Liner material | U F P |
Polyurethane FEP PTFE |
| Grounding ring | W S H X |
Without grounding rings 316 stainless steel Hastelloy C Other specified material |
| Approval option | FM | FM approval where specified and currently available |
On smaller screens, swipe horizontally to view the complete table.
Information to Provide With a Request for Quotation
Flow Conditions
Minimum, normal and maximum flow rate with the required engineering units.
Process Conditions
Liquid description, conductivity, operating temperature and pressure.
Piping Arrangement
Pipe size, flange standard, available straight run and nearby flow disturbances.
Wetted Materials
Required liner, electrode and grounding-ring material compatibility.
Converter Arrangement
Integral or remote electronics and the required interconnecting cable length.
Electrical Requirements
Power supply, analog and pulse outputs, communications and required approvals.
Ordering control: Model codes and available options may change. Cadillac Meter should confirm the complete model number and current availability before an order is placed.
Technical Support and Selection
Need Help Selecting an EMAG?
Download the complete technical guide or contact Cadillac Meter with your liquid, flow range, pipe size, process conditions, material requirements and available straight run.
Email
sales@cadillacmeter.com
Toll-Free
(888) 556-3913
Selection Reminder
Final specifications and installation requirements should be
confirmed in the quotation and approved project submittal.