Series-IEFB

Thermal Energy Meter for 4-36" Pipes, LCD, Multi-Output, High Accuracy

Save time and reduce installation costs with flow, temperature sensors and calculator delivered in one preprogrammed, complete package.
Maintain system energy efficiency with high performance accuracy that is maintained through changes in temperature, density or viscosity per universally accepted standard
Meet application requirements with field configurable setup displays (-LCD integral option or remote accessory A-IEF-DSP), which accommodate a variety of application configurations with one model through multiple display configurations i.e. pipe size, pipe material, liquid type, analog output, pulse/frequency output, alarm outputs, communication outputs, damping, and calibration factor
Quick and easy ordering and set up with Setup Wizard and installation tool that are simple to use and allow for precise installation
Save time with accessory setup kit A-IEF-KIT that ensures exact installation application depth with included thickness gage and measuring tape
Reduced costs, long product life, and minimal maintenance requirements with no moving parts to wear or break and electrodes that discourage fouling
Minimize installation costs with isolation valve accessory options to allow for installation in operational systems via hot-tap kit or easy removal without system downtime
Required documents included with NIST traceable pass/fail verification certificate included standard for Carbon Steel Schedule 40 pipes sized 4" (102 mm), 6" (150 mm), 8" (200 mm)

See Product Overview

Series-IEFB

From ^£ 3,656.26

Shop Models

7 Variations available

See all series options below

Data Sheet

Product Overview

Applications Boilers, Energy Management Systems, Oil, Refrigeration, Refrigeration Equipment
Conductivity > 20 µS/cm
Control Output Alarm
Display Note 2 x 2" (50 x 50 mm) Graphic LCD with Backlight
Display Size 71 mm (2.8 in)
Display Type LCD
Enclosure Ratings IP66, NEMA Type 4X
External Probe Lead Length 3 m (10 ft)
Impedance 4 to 20 mA: 536 Ω; 5V: 500 Ω; 10V: 1.27k Ω
Linear Flow Rate, Max 20 ft/s
Linear Flow Rate, Min 0 ft/s
Materials Aluminum
Materials, Wetted Polymer, Silicone, Stainless Steel
Media Compatibility Conductive liquids, Corrosive chemicals / acids / bases
Operating Temperature, Max 158 °F
Operating Temperature, Min -4 °F
Output Detail (1) Analog: 4-20 mA, 0-5 V, 0-10 V or 2-10 V (display selectable); (1) Pulse/Frequency: 0-15 V peak pulse, 0 to 500 Hz or scalable pulse output (display selectable); (2) Alarm: (1) Empty pipe detection or minimum/maximum velocity, (display selectable); (1) Reverse flow output indication
Output Signal Current, Voltage, DC Pulse
Pressure Drop, Max 0.1 psi
Pressure Drop Note < 0.1 psi at 12 ft/s in 4" (<0.01 bar at 3.7 m/s in 100 mm) and Larger Pipe
Pressure Limits Up to 400 psi
Process Connection Size 1 in
Process Temperature, Max 250 °F
Process Temperature, Min 15 °F
Relative Humidity 10 to 90% Non-Condensing
Resistance Note Matched 4 Wire Platinum RTD’s
Series ID Series-IEFB
Storage Temperature, Max 185 °F
Storage Temperature, Min -40 °F
Straight Run Requirements >10 Diameter Upstream, >5 Diameter Downstream
Supply Power Note 12 to 42 Vdc, 0.25 A @ 24 Vdc; 12 to 36 Vac
Supply Power Type AC/DC
Supply Voltage 12 to 42 Vdc, 12 to 36 Vac
Temperature Compensation 140 to 220°F < 2% error over ± 30°F Change , 40 to 70°F < 2% error over ± 10°F Change
Temperature Sensor Type RTD

Supported Applications

The Series IEFB is a field-adjustable insertion thermal energy meter that uses electromagnetic technology to measure fluid velocity and energy consumption. It integrates a flow sensor, temperature measurement, and an energy calculator into a single unit, making it well suited to chiller, boiler, and heating and cooling applications where both flow and thermal energy must be accounted for.

Because it is an insertion-style meter, it installs into a tapped pipe rather than requiring an in-line spool piece. The high-accuracy IEFB is adjustable to fit pipe sizes from 4 to 10” (100 to 250 mm), while the standard-accuracy IEFB fits pipe sizes from 4 to 36” (100 to 900 mm), so a single family covers a broad range of building and process piping. The meter is compatible with clean or dirty, non-coating, conductive liquids. Only qualified professionals with the necessary trade skills should install, remove, or service the product, and the system must be properly vented before service because it is intended for pressurized pipe applications.

Operating Conditions & Performance

The meter measures velocity over 0 to 20 ft/s (0 to 6 m/s). Accuracy is ±0.5% of reading at the calibrated velocity and ±1% of reading from 2 to 20 ft/s (0.6 to 6 m/s), with a floor of ±0.02 ft/s (±0.006 m/s) below 2 ft/s. Temperature sensing follows Class B ±(0.30 + 0.005 · °C) per EN60751, and the differential-temperature and calculator accuracies follow EN1434.

Outputs are display-selectable and include an analog channel of 4-20 mA, 0-5 V, 0-10 V, or 2-10 V; a pulse/frequency channel of 0-15 V peak pulse at 0-500 Hz or a scalable pulse; and alarm outputs for empty-pipe detection, minimum/maximum velocity, and reverse-flow indication. Analog loads are specified as 536 Ω on the 4-20 mA output, 500 Ω on the 5 V output, and 1.27k Ω on the 10 V output.

Power is 12-42 VDC (0.25 A at 24 VDC) or 12-36 VAC. The unit is rated for 400 psi (27.6 bar) at 100°F (37.8°C). Ambient operating temperature is -20 to 160°F (-29 to 71°C), and the LCD option is rated 4 to 158°F (-20 to 70°C); storage is -40 to 185°F (-40 to 85°C) and humidity is 10 to 90% non-condensing. The housing is powder-coated die-cast aluminum with 316 SS wetted body, shaft, fitting, and electrodes, a silicone O-ring, and 304 SS thermowells. Enclosure protection is rated NEMA 6P (IP68) and NEMA 4X (IP66) depending on configuration.

Configuration Options

Every model is built to the code IEFB - Accuracy - Process Connection - Electrical Housing Connection - Temperature Sensors - Options (for example, IEFB-L-N-CND-R10-LCD). Each field changes a specific capability:

Accuracy / pipe size: standard-accuracy codes are quoted at 1% FS — L for pipe under 10” (250 mm) and S for 4 to 36” (100 to 900 mm) — while high-accuracy codes are quoted at 1% of reading, including F for 4” (100 mm), I for 6” (150 mm), and H for 4 to 10” (100 to 250 mm) pipe.
Process connection: N provides a 1” Male NPT connection and B provides a 1” Male BSPT connection.
Electrical housing connection: CND provides a conduit-style connection, while the PG option adds PG 16 glands with plenum-rated cabling.
Temperature sensors and options: R10 and T10 designate the paired PT temperature-sensor configuration, the LCD option adds a local display, and the COM option adds Modbus communication.

The LCD option also changes the enclosure rating and ambient limits, so the display and non-display builds carry different environmental ratings as noted above.

Key Product Differences

The Series IEFB is offered in the following configured models:

IEFB-FB-PG-R10-LCD-COM, IEFB-FB-PG-T10-LCD
IEFB-FN-CND-R10-LCD-COM
IEFB-HB-PG-R10-LCD, IEFB-HB-PG-R10-LCD-COM, IEFB-HB-PG-T10-LCD, IEFB-HB-PG-T10-LCD-COM
IEFB-HN-CND-R10-LCD, IEFB-HN-CND-R10-LCD-COM, IEFB-HN-CND-T10-LCD, IEFB-HN-CND-T10-LCD-COM
IEFB-IB-PG-R10-LCD-COM, IEFB-IB-PG-T10-LCD
IEFB-IN-CND-R10-LCD-COM
IEFB-LB-PG -R10-LCD-COM, IEFB-LN-CND-R10-LCD, IEFB-LN-CND-R10-LCD-COM
IEFB-SB-PG-R10-LCD-COM, IEFB-SN-CND-R10-LCD-COM