The EF-x1000-T (ELF) is EBTRON’s economical measurement solution for round ducts between 4 and 16 inches in diameter. Ideal for most small duct airflow measurement and volumetric airflow tracking applications. Low flow performance, temperature capability and connectivity options makes this a better choice than traditional differential pressure averaging arrays, rings and crosses.
EB-Flow
Series 1000
EF-x1000-TAirflow Measurement with Temperature Capability
EF-x1000-T
EB-Flow
Series 1000
EF-x1000-TAirflow Measurement with Temperature Capability
- Thermal Dispersion Technology
- Cost Effective Single Probe
- NIST-traceable Calibration
- %-of-reading Accuracy
- Velocity Pressure Output Option
- Temperature Output Models Available
- Analog and RS-485 Output Models
- Duct Insertion Mounting
- Integral Transmitter
- 3-year Warranty
Typical Applications
- High Performance CV/VAV Terminal Box Measurement
- Small Duct Outdoor Air Delivery Monitoring
- Small Duct Airflow Tracking
- Hospital Pressurization
- Laboratory Pressurization
Benefits
- Improve Terminal Box Performance with Turndown
- Comply with ASHRAE Standards
- Satisfy LEED Prerequisites and Credits
- Provide Acceptable IAQ
- Save Energy
- Reduce Liability
- Improve Performance
Product Highlights
- Accurate & Repeatable
- Low Airflow Capability
- Long-term Stability
- Unsurpassed Quality
- Easy to Install
- Very Cost Effective High-performance Solution
General
Probe and Sensor Node Configurations
1 probe x 1 sensor node/probe (4 inch [101.6 mm] probe)
1 probe x 2 sensor nodes/probe (5 to 16 inch [127.0 to 406.4 mm] probes)
Installed Airflow Accuracy¹
Typically better than ±3% of reading
Sensor Node Averaging Method
Airflow: Independent arithmetic average
Temperature: Independent velocity weighted average
Listings
UL (EF-A1000-T): 60730-1; UL 60730-2-9 (HVAC Controls)
Environmental Limits
Temperature:
Probes: 0 to 2,000 fpm [0 to 10.16 m/s]: -20 to 120 ⁰F [-28.9 to 48.9 ⁰C]
Probes: 0 to 3,000 fpm [0 to 15.24 m/s]: 0 to 120 ⁰F [-17.8 to 48.9 ⁰C]
Transmitter: -20 to 120 ⁰F [-28.9 to 48.9 ⁰C]
Humidity: (non-condensing)
Probes: 0 to 100%
Transmitter: 5 to 95%
Individual Sensing Nodes
Sensing Node Sensors
Self-heated sensor: Precision, hermetically sealed, bead-in-glass thermistor probe
Temperature sensor: Precision, hermetically sealed, bead-in-glass thermistor probe
Sensing Node Housing
Material: Glass-filled Polypropylene (Kynar® with /SS option)
Sensor Potting Materials: Waterproof marine epoxy
Sensing Node Internal Wiring
Type: Kynar® coated copper
Airflow Measurement
Accuracy: ±3% of reading to volumetric airflow standards (includes transmitter uncertainty)
Calibrated Range: 0 to 3,000 fpm [0 to 15.24 m/s]
Calibration Points: 7
Temperature Measurement
Accuracy: ±0.15 ⁰F [0.08 ⁰C] to NIST-traceable temperature standards (includes transmitter uncertainty)
Calibrated Range: -20 to 120 ⁰F [-28.9 to 48.9 ⁰C]
Calibration Points: 3
Sensor Probe Assembly
Tube
Material: Mill finish 6063 aluminum (316 stainless steel with /SS option)
Mounting Brackets
Material: 304 stainless steel
Mounting Options & Size Limits
Insertion: 4, 5, 6, 7, 8, 9, 10, 12, 14, & 16 inch round [101.6, 127.0, 152.4, 177.8, 203.2, 228.6, 254.0, 304.8, 355.6 & 406.4 mm]
Integral Transmitter
Power Requirement:
24 VAC (22.8 to 26.4 under load) @5V-A
User Interface:
DIP switch
B.A.S. Connectivity Options
EF-A1000 Transmitter: One field selectable (0-10/2-10 VDC* or 0-5/1-5 VDC* – specify at time of order), scalable and protected analog output signal (AO1=airflow)
EF-A1001 Transmitter: Two field selectable (0-10/2-10 VDC* or 0-5/1-5 VDC* – specify at time of order), scalable and protected analog output signals (AO1=airflow, AO2 = temperature) * The VDC output circuit of the EF-A1000 transmitter can drive the input circuit of devices designed to measure 4-wire current loops with a resistive load ≥250 ohms.
EF-N1000 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 at each EF-N1000 transmitter for applications requiring isolated RS-485)
System Status Alarm
Type: Sensor diagnostic system trouble indication
Visual Indication: Yes, LED on circuit board
Network Indication: Yes (EF-N1000 only)
¹Installed airflow accuracy is the actual system accuracy expected and includes sampling uncertainty of the sensor probes when installation meets or exceeds placement guidelines.
Related Documents
Type
Title
