The series 640 features ±2% accuracy with four field selectable ranges of 0-200,0-1000,0-3000/0-12,000 FPM
The series 640 features ±2% accuracy with four field selectable ranges of 0-200, 0-1000, 0-3000 and 0-12,000 FPM.
The transmitter is easily installed with the mounting hardware supplied, including a split flange for securing the sensing probe in the duct. Requiring only 22-28 volts AC or DC for power it has a 4-20 mA output. The NEMA 13 housing is suitable for all indoor industrial institutional or commercial installations.
SPECIFICATIONS
General
Media
Air
Ranges
0-200, 0-1000, 0-3000, 0-12,000 FPM (field selectable: referenced to standard conditions)
Accuracy
(% of FS)
0-200 FPM Range
±5% @32-180°F
±9% @0-32° or 180-200°F
0-1,000, 0-3,000, 0-12,000 FPM Ranges
±2% @32-180°F
±6% @0-32° or 180-200°F
± 5% of full span output, 32°-180°F
± 7% of full span output, 0°-32°F & 180°-200°F
Electrical
Power Supply
22-28 VDC or VAC
Output Signal
4-20 mA DC
Loop Resistance
0-300Ω
Current Consumption
250 mA Maximum Warm-Up time: 3 to 5 minutes
Performance
Zero Output: 4 mA
Full Span output
20 mA
Environmental
Temperature Ranges: Dry Air Stream (Probe) 0 to 200°F Operating (Transmitter) 32° to 160°F
Storage
0° to 200°F
Mechanical
Weight
3 lbs. (includes probe and cable)
Probe length
12" insertion depth
Cable length
6 feet
Range Adjustment
protected switches
1 year warranty
CAT NO.
MODEL
DEscRIPTION
AVAIL
PRICE
DW33984
640-0
AIR VELOCITY TRANSMITTER
Yes
1,278,720
ML3814101
MEC24-1000
OPTIONAL 24V LINEAR POWER SUPPLY 1 AMP OUTPUT CURRENT FOR Air Velocity Transmitter with Hot Wire Sensor
Yes
429,840
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