BACnet and Modbus available only on HTN104-B.
BACnet is a registered trademark of ASHRAE. ASHRAE does not endorse, approve or test products for compliance with ASHRAE standards. Compliance of listed products to the requirements of ASHRAE Standard 135 is the responsibility of BACnet International. The BTL logo is a registered trademark of BACnet International.
The HTx104-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 HTx104-B can be used to determine the airflow rate across fixed openings when a reference airflow rate is provided. More output circuit protection than the EF-x2000-B with a true 4-20mA output option (HTA104-B) makes this the best choice for these applications.
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: Requires field measurement of a reference airflow of the specific installation. The Field Adjust Wizard (FAW) facilitates setup. Equivalent pressure between two adjacent spaces: 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 and Compliance
UL: UL-873 and CSA C22.2 No. 24;
CE: Non-UK European shipments only.
UKCA: UK shipments only.
BACnet International: BTL Listed (HTN104 transmitter).
FCC: This device complies with Part 15 of the FCC rules.
RoHS: This device is RoHS2 compliant.
Environmental Limits
Temperature:
Sensor: -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: 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 302 ⁰F [-55 to 150 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
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
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 (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 (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 (HTN104only)
Analog Signal Indication: Yes, on AO2 assignment (HTA104 only)
