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GENERAL-PURPOSE AIR
VELOCITY TRANSDUCER
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FMA-900-V
 1.5% Max
Accuracy
Each Unit Individually
Calibrated
Durable Fast-Response
Platinum Sensors
Compact Solid-State
Electronics
Directly Monitors
True Air Mass Velocity
Linear 0-5 Vdc
or 4-20 mA Output
400 msec Response
Time
Economical Insertion
Design
The unique FMA-900 air velocity transducer utilizes
both a velocity sensor and a temperature sensor to accurately measure
the air velocity (in SFPM, standard feet per minute). The built-in
temperature sensor automatically corrects the flow rate for temperature
variations. Both sensors are rugged glass-coated platinum resistance
detectors (RTDs). The circuit heats the velocity sensor to a constant
temperature differential above ambient temperature and measures
the cooling effect of the air flow. This design provides excellent
low velocity sensitivity and high accuracy. The FMA-900 also features
negligible pressure drop.
To obtain mass flowrate in SCFM (standard cubic feet/minute), the
SFPM velocity indicated by the FMA-900 is multiplied by the cross-sectional
area of the pipe or duct in square feet. A traverse across the pipe
or duct can be performed to determine the mounting location for
average velocity indication. The FMA-900 can be mounted in pipes
(down to 1" size) with the use of NEWPORT SSLK compression fittings.
Each unit is individually calibrated in NEWPORTÆs NIST-traceable
wind tunnel. |
The high amplitude pulse
output from the FP9P opto-electronic interface is ideally suited for hook
up to the model INF7 ratemeter/totalizer. For 4-20 mA output, purchase
the FLSC90 Series signal conditioner. Please specify fitting and calibration
range for the 4-20 mA output. The FLSC90 includes the optical interface
for the FP9000 sensor.
SPECIFICATIONS
Accuracy: 1.5% FS @ room temp. Add ▒0.5% of reading from 0 to 50ºC
(32ºF to 122ºF); add 1% FS below 1000 SFPM
Repeatability: ▒0.2% FS
Response Time: 400 msec to within 63% of final value
Probe: Aluminum oxide ceramic glass coating, epoxy; probe body
304 SS
Probe Temperature: -40 to 121ºC (-40 to 250ºF)
Probe Pressure: 150 PSIG max.
Electronics Temperature: 0 to 50ºC (32 to 122ºF), operating;
0 to 70ºC (32 to 158░F), storage
Outputs: 0 to 5 Vdc or 4 to 20 mA
Voltage Load Resistance: 250 ohms minimum
Current Loop Resistance: 0 ohms min. to 400 ohms max.; 4 wire
Power: 15 to 24 Vdc, 300 mA (0 to 100 and 0 to 200 SFPM only);
15 to 18 Vdc, 300 mA (all other ranges)
Accessories: Mating connector included
DIMENSIONS
Case: 89 H x 51 W x 31.8 mm D (3.5" H x 2" W x 1.25" D)
Probe: 6.35 mm (0.250") O.D., 330 mm (13") length
Weight: 0.16 kg (0.350 lb).
Replacement
mating connector - Model No. FMA-3CON, $25.
TO
ORDER
(Specify Model No.) Prices shown in U.S. Dollars
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Model No.
0-5 V Output
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Price
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Model No.
4-20 mA Output
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Range
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Price
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FMA-900-V
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$882
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FMA-900-I
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10-100 SFPM
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$882
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FMA-901-V
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$882
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FMA-901-I
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10-200 SFPM
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$882
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FMA-902-V
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$882
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FMA-902-I
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10-500 SFPM
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$882
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FMA-903-V
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$882
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FMA-903-I
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10-1000 SFPM
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$882
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FMA-904-V
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$882
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FMA-904-I
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10-2000 SFPM
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$882
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FMA-905-V
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$882
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FMA-905-I
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10-5000 SFPM
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$882
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FMA-906-V
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$882
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FMA-906-I
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10-10,000 SFPM
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$882
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Comes with mating
connector and complete operatorÆs manual. To order with 3.75" probe
instead of standard 13" probe, add suffix "-S" to model
number and add $30 to price.
Ordering
Example: FMA-904-I,
probe with 4-20 mA
output, 10-2000 SFPM
range, $882.
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