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Hot Wire Air Velocity Transmitter with Alarm Contact

Intergral 12" Probe, 4-20 mA, 0-1000 FPM


Article# FMA902A-MA

En stock

Délai de livraison (si pas en stock): 6 semaines
Intergral 12" Probe, 4-20 mA, 0-1000 FPM FMA902A-MA FMA902A-MA
  • Air Velocity Range Up to 10,000 FPM (50.8 m/sec)
  • ± 15 FPM Full Scale Accuracy
  • Hot Wire Air Velocity Sensor Design
  • Two Sensor Probe Configurations: Fixed Mount and Remote Probe

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Velocity Range
Probe Length (Maximum)
Output Signal
Application Type
Max Process Temperature
Probe Diameter
Supply Power

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.

Air Velocity Range:
0 to 500, 0 to 1000, 0 to 2000, 0 to 5000, 0 to 10,000
Accuracy: 2% of FS
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 93°C (-40 to 199°F)
    Electronic Case: 0 to 50°C (32 to 122°F)
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)
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Rated 3 out of 5 by from It is broken I bought it less month ago. But now it is broken. So I bought another one today. I will send the old one to the company and let them repair it for me.
Date published: 2016-09-30
Rated 2 out of 5 by from FMA902R-V1 Instructions vague & not detailed, no recommendation for display --digital or analogue
Date published: 2019-02-25
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Do these come calibrated with the calibration values

Asked by: Ben4009
Thank you for your inquiry. The FMA900A series meter are calibrated but do not come with a calibration certificate. If you need a calibration certificate with the meter, send an e-mail to and we can provide a quote for the meter with a calibration certificate.
Answered by: AS Engineer
Date published: 2019-10-09
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