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%

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

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]

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)