FMA-900

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General-Purpose Air Velocity Transducer

FMA-900

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 OMEGA® SSLK compression fittings. Each unit is individually calibrated in OMEGA's NIST-traceable wind tunnel.

SPECIFICATIONS:

Accuracy: 1.5% FS @ room temp. Add ▒0.5% of reading from 0 to 50°C (32°F to 122°F); 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 121°C (-40 to 250°F)
Probe Pressure: 150 PSIG max.
Electronics Temperature: 0 to 50°C (32 to 122°F), operating; 0 to 70°C (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:

Probe:

Weight:

To Order (Specify Model Number)
Model No. 0-5 V Output	Price	Model No. 4-20 mA Output	Price	Range
FMA-900-V	$822	FMA-900-I	$882	10-100 SFPM
FMA-901-V	822	FMA-901-I	882	10-200 SFPM
FMA-902-V	822	FMA-902-I	882	10-500 SFPM
FMA-903-V	822	FMA-903-I	882	10-1000 SFPM
FMA-904-V	822	FMA-904-I	882	10-2000 SFPM
FMA-905-V	822	FMA-905-I	882	10-5000 SFPM
FMA-906-V	822	FMA-906-I	882	10-10,000 SFPM
Comes with mating connector and complete operator's 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.

U.S.A. and Canada
	International Callers; Sales & Service; 203.359.1660

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