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Transmitter of the air velocity Environment

Transmitter of the air velocity

Product Code:8455, 8465 and 8475


Need more Info? (514) 354-2511 - 1-800-463-4363

Applications
• 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

 

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.

General Purpose (8455)
• Protected probe tip
• Rugged ceramic sensor
• Wide range of measurement applications
• Fast response time
Windowless (8465)
  • Less flow blockage
• Ideal for measuring in confined 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 flow direction
8455
8465
8475

 

 

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 reading3
8475 N/A
Response to Flow
8455 and 8465 0.2 sec.4
8475 5 sec.5
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
11-30 VDC or 18-38 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 0–5V, 0–10V, 0–20, 2–10V,
mA, 4–20 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)

 

 

 
8455/8465
8475
Range
25-10,000 fpm (0.127-
50.8 m/s), selectable
10-500 fpm (0.051-
2.54 m/s), selectable
Accuracy
±(2% of reading at 64.4-
82.4°F (18-28°C) + 0.5%
of full scale of selected
range)
±(3% of reading at 68.0-
82.4°F (20-26°C) +1% of
full scale of selected
range)
Response time
0.2 seconds
5.0 seconds
Input power
350 m, 11-30 VDC or 18-28 VAC, A maximum
1 From 64.4 to 82.4°F (18 to 28°C), outside this range and within temperature compensation range add 0.4% per °F (0.2% per °C).
2 From 68 to 78.8°F (20 to 26°C), outside this range and within temperature compensation range add 0.9% per °F (0.5% per °C). Directed sensitivity of the Model 8475 is a +5%/-20% of reading +0/-10 ft/min (+0/-0.05 m/s) over 270° solid angle regardless of flow direction.
3 Standard deviation based on one minute average from 100 to 1,000 fpm (0.5 to 5.0 m/s).
4 For 63% of final value, tested at 1,500 fpm (7.5 m/s).
5 For 63% of final value, tested at 500 fpm (2.5 m/s).
6 Input voltage must be maintained within specifications at the transducer.

 

 

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