EB-Flow

Series 2000
EF-x2000-B
Bleed Airflow Measurement with Temperature and Alarm Capability
EFX-2000-B
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EB-Flow II

Series 2000
EF-x2000-B
Bleed Airflow Measurement with Temperature and Alarm Capability

The EF-x2000-B is a unique measurement device that can detect very small pressure differentials (as low as 0.0002” H2O) between two adjacent spaces by sensing the airflow rate induced by the pressure gradient. The EF-x2000-B can be used to determine the airflow rate across fixed openings when a reference airflow rate is provided

  • Thermal Dispersion Technology
  • Bi‐directional Airflow Measurement
  • Detect ΔP as low as 0.0002″ H₂0
  • Airflow (or ΔP) and Status Alarm
  • Temperature Output Capability
  • Analog and RS‐485 Output Models
  • Dry Contact Relay
  • 1/2″ NPT Female Pipe Connections
  • Remote Transmitter with LCD Display
  • 3‐year Warranty

Typical Applications

  • Ultra-low Differential Pressure Detection
  • Parking Garage Pressurization
  • Construction Zone Contaminant Containment
  • Stairwell Pressurization
  • Relief and Exhaust Damper Control
  • Airflow across a Louver or other Fixed Opening

Benefits

  • Maintain Pressure Relationships between Adjacent Spaces
  • Satisfy LEED Prerequisites and Credits
  • Provide Acceptable IAQ
  • Save Energy
  • Reduce Liability
  • Improve Performance

Product Highlights

  • Uni- or Bi-directional Measurement
  • Extremely Sensitive
  • Airflow or Equivalent Pressure Output
  • Long-term Stability
  • Small Footprint
  • Simple NPT Pipe Connections
  • Optional Mounting Kits Available

General

Probe and Sensor Node Configurations

1 bi-directional, dual 1/2” NPT female bleed sensor housing

Installed Airflow Accuracy

Airflow through an opening or across and obstruction: ±(3% to 15%), Requires
field measurement of a reference airflow of the specific installation.
The Field Adjust Wizard (FAW) facilitates setup.
Equivalent pressure between two adjacent spaces: ±(3% to 15%), Requires field measurement of a reference pressure to correct the default flow coefficient of the specific installation. The Field Adjust Wizard (FAW) facilitates setup.

Listings

UL: : 60730-1, 60730-2-9; CAN E60730-1, E60730-2-9 (EF-A2000-B Only)
FCC:This device complies with Part 15 of the FCC rules
RoHS: This device is RoHS2 compliant

Environmental Limits

Temperature:
Sensor: -2,000 to 2,000 fpm [-10.16 to 10.16 m/s] -20 to 160 ⁰F [-28.9 to 71.1 ⁰C]
Sensor: -3,000 to 3,000 fpm [-15.24 to 15.24 m/s] 0 to 160 ⁰F [-17.8 to 71.1 ⁰C]
Transmitter: -20 to 120 ⁰F [-28.9 to 48.9 C]
Humidity: (non-condensing)
Probes: 0 to 100%
Transmitter: 5 to 95%

Bleed Sensor Assembly

Sensing Node Sensors

Self-heated sensor: Two precision, hermetically sealed, bead-in-glass thermistor probes
Temperature sensor: One precision, hermetically sealed, bead-in-glass thermistor probe

Sensing Node Housing

Material: Glass-filled Polypropylene
Sensor Potting Materials: Waterproof marine epoxy

Airflow Measurement

Accuracy: ±2% of reading to NIST-traceable airflow standards (includes transmitter uncertainty)
Calibrated Range: -3,000 to 3,000 fpm [-15.24 to 15.24 m/s]
Calibration Points: 9

Temperature Measurement

Accuracy: ±0.15 ⁰F [0.08 ⁰C] to NIST-traceable temperature standards (includes transmitter uncertainty)
Calibrated Range: -20 to 160 ⁰F [-28.9 to 71.1 ⁰C]
Calibration Points: 3

Probe to Transmitter Cables

Type: FEP jacket, plenum rated CMP/CL2P, UL/cUL listed, -67 to 392 ⁰F [-55 to 200 ⁰C], UV tolerant
Standard Lengths: 10, 25 and 50 ft. [3.1, 7.6 and 15.2 m]
Connecting Plug: 0.60” [15.24 mm] nominal diameter

Transmitter

Power Requirement: 24 VAC (22.8 to 26.4 under load) @8V-A
User Interface: 16-character LCD display and 4 button interface

B.A.S. Connectivity Options

EF-A2000 Transmitter: Two field selectable (0-5/1-5/0-10/2-10 VDC), scalable and protected analog output signals (AO1=airflow or equivalent ∆P, AO2=temperature or alarm)
* The VDC output circuit of the EF-A2000 transmitter can drive the input circuit of devices designed to measure 4-wire current loops with a resistive load ≥250 ohms.
EF-N2000 Transmitter: One field selectable (BACnet MS/TP or Modbus RTU) and non-isolated RS-485 network connection – Individual sensor node airflow rates and temperatures are available via the network (provide individual 24 VAC transformers for each EF-N2000 transmitter for applications requiring isolated RS-485)

Relay

Type: Dry Contact w/ onboard jumper to drive a remote LED (R1=alarm)
Status: N.O. or N.C. via user setup configuration
Rating: 30 VDC or 24 VAC @ 3 amp. max.

Airflow (or Pressure) Alarm

Type: Low and/or high user defined setpoint alarm
Tolerance: User defined setpoint value
Delay: User defined
Reset Method: Manual or automatic
Visual Indication: Yes, LCD display
Network Indication: Yes (EF-N2000 only)
Analog Signal Indication: Yes, on AO2 assignment (EF-A2000 only)
Contact Closure Relay: Yes, on R1 assignment

System Status Alarm

Type: Sensor diagnostic system trouble indication
Visual Indication: Yes, LCD display
Network Indication: Yes (EF-N2000 only)
Analog Signal Indication: Yes, on AO2 assignment (EF-A2000 only)
Contact Closure Relay: Yes, on R1 assignment

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