8465 Air Velocity Transducer

Features and Benefits
•Windowless probe tip for reduced flow blockage
•Protected probe tip and rugged ceramic sensor
•Linear user-selectable analogue output

Applications
•HVAC monitoring
•Industrial process monitoring
•Fixed locations
•Comfort and draft studies
•Critical environment installations (e.g., clean rooms and hospitals)
•Diffuser design analysis
•Monitoring drying processes
•Monitoring air flows in tunnels and subways
•Used as a standard in wind tunnels and calibration facilities
•Environmental monitoring in greenhouses and IAQ applications
•General engineering applications

SPECIFICATIONS
Models 8455, 8465, 8475
All models contain on-board electronics and calibration curves that provide a linear signal output. This linear signal is sent out as either a current (mA) or a voltage (V) signal, allowing output to a variety of data loggers or data acquisition systems. In addition, the current and voltage output ranges are user-selectable for your convenience.

Accuracy
8455 ±2.0% of reading1, ±0.5% of full scale of selected range
8465 ±2.0% of reading1, ±0.5% of full scale of selected range
8475 ±3.0% of reading2, ±1.0% of full scale of selected range

Field Selectable Range
8455 and 8465 25 ft/min to 200, 250, 300, 400, 500, 750, 1,000, 1,250, 1,500, 2,000, 2,500, 3,000, 4,000, 5,000, 7,500, 10,000 ft/min (0.125 m/s to 1.0, 1.25, 1.50, 2.0, 2.5, 3.0, 4.0, 5.0, 7.5, 10.0, 12.5, 15.0, 20.0, 25.0, 30.0, 40.0, 50.0 m/s)

8475 10 ft/min to 100, 125, 150, 200, 250, 300, 400, 500 ft/min (0.05 m/s to 0.5, 0.75, 1.0, 1.25, 1.50, 2.0, 2.5 m/s)

Repeatability
8455 and 8465 <±1.0% of reading
8475 N/A

Response to Flow
8455 and 8465 0.2 sec.4
8475 0.2 sec.5

Temperature Range
Compensation: 0 to 60°C
Operating (electronics): 0 to 93°C
Operating (sensor): 0 to 93°C
Storage: 0 to 93°C

Resolution (minimum)
0.07% of selected full scale

Input Power
11 to 30 VDC or 18 to 38 VAC, 350 mA max6

Output
Impedance Voltage mode: less than 1 ohm, 20 mA max source current
Resistance Current mode: 500 ohms maximum load
Signal Field selectable 0 to 5V, 0 to 10V, 0 to 20, 2 to 10V, mA, 4 to 20 mA

Time Constant Field selectable 0.05 to 10 seconds

Probe length
3 in., 6 in., 9 in., 12 in. (7.5 cm, 15 cm, 22.5 cm, or 30 cm)
The 8455, 8465, and 8475 Air Velocity Transducers are ideal for both temporary and permanent installations for air velocity measurements in research and development labs, manufacturing processes, and other applications. The full–scale range, signal output, and time constant are user selectable and can be easily changed to meet the needs of your application.