Probe and Sensor Node Configurations (max.)

1 probe x 4 sensor nodes/probe
2 probes x 2 sensor nodes/probe

Installed Airflow Accuracy¹

Ducts/Plenum ≤ 2 sq.ft. [0.18 sq.m]: ±3% of reading

All other applications and sizes: Unspecified

PE Sensor Density Rules (typical)

Sensor Node Averaging Method

Airflow: Independent, arithmetic average

Temperature: Independent, velocity weighted or arithmetic average

Listings

UL: UL 873 Listed

CE: European shipments only

BACnet International: BTL Listed (HTN104 transmitter)

Environmental Limits

Temperature:

Probes: -20 to 160 ⁰F [-28.9 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%

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: ±2% of reading to NIST-traceable airflow standards (includes transmitter uncertainty)

Calibrated Range: 0 to 5,000 fpm [0 to 25.4 m/s]

Calibration Points: 16

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

Tube

Material: Gold anodized 6063 aluminum (316 stainless steel with /SS option)

Mounting Brackets

Material: 304 stainless steel

Options & Standard Size Limits²

Insertion, and Stand-off: 6 to 120 in. [152.4 to 3048 mm]

Internal: 8 to 120 in. [203.2 to 3048 mm]

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, 15, 20, 25, 30, 40 and 50 ft. [3.1, 4.6, 6.1, 7.6, 9.1, 12.2 and 15.2 m]

Connecting Plug: 0.60” [15.24 mm] circular DIN

Power Requirement:

24 VAC (22.8 to 26.4 under load) @11V-A

PCB Connections:

Gold-plated PCB interconnects and test points

User Interface:

16-character LCD display and 4 button interface

B.A.S. Connectivity Options

HTA104 Transmitter: Two field selectable (0-5/0-10 VDC or 4-20mA), scalable and isolated analog output signals (AO1=airflow, AO2=temperature or alarm)

HTN104 Transmitter: One field selectable (BACnet MS/TP or Modbus RTU) and isolated RS-485 network connection- Individual sensor node airflow rates and temperatures are available via the network

Airflow Alarm

Type: Low and/or high user defined setpoint alarm

Tolerance: User defined % of setpoint

Delay: User defined

Zero Disable: Alarm can be disabled when the airflow rate falls below the low limit cutoff value (unoccupied periods)

Reset Method: Manual or automatic

Visual Indication: Yes, LCD display

Network Indication: Yes (HTN104 only)

Analog Signal Indication: Yes, on AO2 assignment (HTA104 only)

System Status Alarm

Type: Sensor diagnostic system trouble indication

Visual Indication: Yes, LCD display

Network Indication: Yes (HTN104 only)

Analog Signal Indication: Yes, on AO2 assignment (HTA104 only)