TSI Alnor 8455, 8465, 8475 Specifications

AIR VELOCITY

TRANSDUCERS

MODELS 8455, 8465, AND 8475

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.

8455

8465

8475

Applications

+ Comfort and draft studies

+ Critical environment installations (e.g., clean rooms and hospitals)

+ Diuser design analysis

+ Monitoring drying processes

+ Monitoring air ows in tunnels and subways

+ Used as a standard in wind tunnels and calibration facilities

+ Environmental monitoring in greenhouses and IAQ applications

+ General engineering applications

General Purpose (8455)

+ Protected probe tip

+ Rugged ceramic sensor

+ Wide range of measurement applications

+ Fast response time

Windowless (8465)

+ Less ow blockage

+ Ideal for measuring in conned spaces

+ Fast response time

Omnidirectional (8475)

+ Omnidirectional probe tip

+ Accurate at low velocities from 10 to 100 ft/min

(0.05 to 0.5 m/s)

+ Ideal for unknown or varying ow direction

UNDERSTANDING, ACCELERATED

SPECIFICATIONS

9 in. (22.5 cm), 12 in. (30.0 cm)

AIR VELOCITY TRANSDUCERS MODELS 8455, 8465, AND 8475

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 8475 5 sec

Temperature Range

Compensation 32 to 140°F (0 to 60°C) Operating (electronics) 32 to 200°F (0 to 93°C) Operating (sensor) 32 to 200°F (0 to 93°C) Storage 32 to 200°F (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 max

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)

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.

2.35 in. (6.0 cm)

Cable

16.4 ft (5.0 m)

3.16 in.

(8.0 cm)

4.95 in.

(12.6 cm)

8465/8475

.25 in.

(6.4 mm)

3 in. (7.5 cm), 6 in. (15.0 cm)

9 in. (22.5 cm), 12 in. (30.0 cm)

.25 in.

(6.4 mm)

8455

3 in. (7.5 cm), 6 in. (15.0 cm)

0.180 in. (4.6 mm)

1.25 in.

(3.2 cm)

1.33 in.

(3.4 cm)

8455/8465 8475

Range

25 to 10,000 fpm (0.127 to 50.8 m/s), selectable ±(2% of reading at 64.4

Accuracy

to 82.4°F (18-28°C) +0.5% of full scale of selected range)

Response time Input power

From 64.4 to 82.4°F (18 to 28°C), outside this range and within temperature compensation range add 0.11% per °F (0.2% per °C).

From 68 to 78.8°F (20 to 26°C), outside this range and within temperature compensation range add 0.28% per °F (0.5% per °C). Directional sensitivity of the Model 8475 is +5%/-20% of reading +0/-10 ft/min (+0/-0.05 m/s) over 270° solid angle regardless of ow direction.

Standard deviation based on one minute average from 100 to 1,000 fpm (0.5 to 5.0 m/s).

For 63% of nal value, tested at 1,500 fpm (7.5 m/s).

For 63% of nal value, tested at 500 fpm (2.5 m/s).

Input voltage must be maintained within specications at the transducer.

Specications are subject to change without notice.

TSI and the TSI logo are registered trademarks of TSI Incorporated.

0.2 seconds 5.0 seconds 11 to 30 VDC or 18 to 28 VAC, 350 mA maximum

10 to 500 fpm (0.05 to

2.54 m/s), selectable ±(3% of reading at

68.0-78.8°F (20 to 26°C) +1% of full scale of selected range)

UNDERSTANDING, ACCELERATED

TSI Incorporated

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