Omega Products FMA900A-V1-S User Manual
INDUSTRIAL AIR VELOCITY
TRANSMITTER
with Built-In Relay
FMA900A Series
†
Optional
U Air Velocity Range Up to
12,000 FPM (60.9 m/sec)
U 2% Full Scale Accuracy
U Hot Wire Air Velocity
Sensor Design
U Two Sensor Probe
Configurations: Fixed
Mount and Remote Probe
U 250 msec Response Time
U Adjustable High Alarm
Set Point
One SPST Relay Contact
U
Closure with Red LED
Indication
U
Linear 0 to 5 Vdc or
4 to 20 mA Analog
Output
U
Used in HVAC
Monitoring, Exhaust/
Ventilation Hoods
Economical
6 OD x 305 mm L
(¹⁄₄ OD x 12")
insertion probe
design.
Fixed
probe
The FMA900A Series measures air
velocity and provides an analog
output proportional to the air flow,
and one SPST relay contact closure
for high alarm operation. The alarm
set point is adjustable from 0 to
100% of the air flow range. The unit
comes with one green power LED,
and one red LED for alarm
indication. The FMA900A Series are
used in research and development
labs, HVAC applications, exhaust/
ventilation hoods and other
manufacturing processes. The
sensor probe comes in two
configurations, fixed mount 305 mm
(12") probe and remote 305 mm
(12") probe with 4.5 m (15')
of shielded cable.
SPECIFICATIONS
Air Velocity Range: 0 to 200, 0 to 500,
0 to 1000, 0 to 2000, 0 to 5000,
0 to 10,000, 0 to 12,000 FPM
Accuracy: 2% of FS or 15 FPM
whichever larger
Air Velocity Probe: 6 OD x 305 mm L
(¼ OD x 12") stainless steel,
or remote probe
High Alarm Set Point: Adjustable from
0 to 100% of air flow range
Alarm Indication: Red LED on the
back plate
Alarm Deadband: 5% of FS
Relay: One 12V SPST NO relay
Contact Rating: 10A @ 24 Vdc
Analog Output: 0 to 5 Vdc, 4 to 20 mA
Operating Ambient Temperature:
Sensor Probe: -40 to 121ºC
(-40 to 250ºF)
Electronic Case: 0 to 50ºC
(32 to 122ºF)
Power Indicator: Green LED
Power: 15 to 24 Vdc @ 200 mA
Dimensions: 89 H x 51 W x 32 mm D
(3.5 x 2 x 1.25")
Weight: 160 g (5.6 oz)
C-X
FMA901A-V1,
shown actual size.
C
Complimentary Products
Mini wind tunnel
WTM-1000. For details visit
omega.com/wtm-1000
Shown smaller than
actual size.
Electronic control
box included.
HHF11A anemometer,
sold separately. For details
visit omega.com/hhf11
WT4401-S, wind tunnel
with differential pressure
monitor. For details visit
omega.com/wt4401
To Order Visit omega.com/fma900a for Pricing and Details
Model No. Range FPM (m/sec) Description
FMA900A-*-** 0 to 200 (0 to 1.02) Air velocity transmitter, fixed probe
FMA900R-*-** 0 to 200 (0 to 1.02) Air velocity transmitter, remote probe
FMA901A-*-** 0 to 500 (0 to 2.54) Air velocity transmitter, fixed probe
FMA901R-*-** 0 to 500 (0 to 2.54) Air velocity transmitter, remote probe
FMA902A-*-** 0 to 1000 (0 to 5.08) Air velocity transmitter, fixed probe
FMA902R-*-** 0 to 1000 (0 to 5.08) Air velocity transmitter, remote probe
FMA903A-*-** 0 to 2000 (0 to 10.16) Air velocity transmitter, fixed probe
FMA903R-*-** 0 to 2000 (0 to 10.16) Air velocity transmitter, remote probe
FMA904A-*-** 0 to 5000 (0 to 25.4) Air velocity transmitter, fixed probe
FMA904R-*-** 0 to 5000 (0 to 25.4) Air velocity transmitter, remote probe
FMA905A-*-** 0 to 10,000 (0 to 50.8) Air velocity transmitter, fixed probe
FMA905R-*-** 0 to 10,000 (0 to 50.8) Air velocity transmitter, remote probe
FMA906A-*-** 0 to 12,000 (0 to 60.9) Air velocity transmitter, fixed probe
FMA906R-*-** 0 to 12,000 (0 to 60.9) Air velocity transmitter, remote probe
Accessories
Model No. Description
CAL-3-FLOW† NIST traceable 4-point calibration certificate
TX8-100 8 conductor shielded cable, PVC insulation, 30.5 m (100') spool
PSR-24S Regulated 24 Vdc @ 400 mA power supply, screw terminal
PSR-24L Regulated 24 Vdc @ 400 mA power supply, stripped leads
SSLK-14-14 Compression fitting, ¹⁄₄" tube OD, ¹⁄₄ NPT
T-FER-1/4 ¹⁄₄" PTFE ferrules (10-pack) for use with SSLK-14-14 compression fitting
* Specify output type, add suffix “V1” for 0 to 5 Vdc, or “MA” for 4 to 20 mA, no additional charge.
** For 95 mm (3.75") short probe add suffix “S”, no additional charge.
†
Unit is NIST traceable up to 8500 FPM
Comes complete with 305 mm (12") long sensor probe or remote probe, and operator’s manual.
Ordering Examples: FMA904R-V1, air velocity transmitter with built-in relay, 0 to 5000 FPM, remote probe, 0 to 5 Vdc output.
FMA902A-MA, air velocity transmitter with built-in relay, 0 to 1000 FPM, fixed probe, 4 to 20 mA output.
C-2
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