Micro Flow Sensor - Moog Inc. FLOW SENSORS_ The Moog Bradford Micro Flow Sensor (MFS) is a thermal...
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FLOW SENSORS_ The Moog Bradford Micro Flow Sensor (MFS) is a thermal capacity measurement principle based, fully ESA qualified mass flow rate gauging component for gaseous media, such as nitrogen, xenon, helium and argon. The measurement principle is tailored for very low mass flow rates in the range from 0 to 1 mg/s. By means of a by- pass architecture, the actual mass flow rate range can be scaled to fit any customer requirement. The actual measured response of the MFS (with a τ63% of roughly 1.5 seconds), can be predicted because the dynamic response follows a near perfect power of an exponential (e) function. The resulting derivative signal has a settling time (τ63%) of down to 25 msecs. The algorithm needed to perform the Flow Sensor signal acceleration is implemented as a dedicated analog electronics, which is combined with the FS signal amplification into the Flow Sensor Electronics (FSE). Micro Flow Sensor © ESA © ESA © ESA
Transcript of Micro Flow Sensor - Moog Inc. FLOW SENSORS_ The Moog Bradford Micro Flow Sensor (MFS) is a thermal...
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FLOW SENSORS_
The Moog Bradford Micro Flow Sensor (MFS) is a thermal capacity measurement principle based, fully ESA qualified mass flow rate gauging component for gaseous media, such as nitrogen, xenon, helium and argon.
The measurement principle is tailored for very low mass flow rates in the range from 0 to 1 mg/s. By means of a by-pass architecture, the actual mass flow rate range can be scaled to fit any customer requirement.
The actual measured response of the MFS (with a τ63% of roughly 1.5 seconds), can be predicted because the dynamic response follows a near perfect power of an exponential (e) function. The resulting derivative signal has a settling time (τ63%) of down to 25 msecs. The algorithm needed to perform the Flow Sensor signal acceleration is implemented as a dedicated analog electronics, which is combined with the FS signal amplification into the Flow Sensor Electronics (FSE).
Micro Flow Sensor
© ESA © ESA © ESA
Form 500-848 0514
De Wijper 26, 4726 TG Heerle (NB), The Netherlandswww.bradford-space.com or www.moog.com/space
© 2014 Moog, Inc . A l l r i gh ts reser ved .
Micro Flow SensorMicro Flow Sensor
Performance CharacteristicsMedium compatibility GHe, GN2, GXe, GAr, Air
Test media Air, IPA, De-ionised H20
Mass flow measurement range 0 … 1 mg/s to 0 … 1 g/s (calibrated to specific medium and range according customer requirement)
Operating pressure range 0 … 10 to 0 … 150 barA
Proof pressure 150 barA
Burst pressure Up to 250 barA
External leakage < 10-5 scc/s GHe (over temp. range -30 °C to +60 °C)
Measurement accuracy ± 0.1% FS + 0.5% R (incl. repeatability)
Measurement response time ≤ 100 msec for 63%
Pressure sensitivity Negligible
Sensitivity 0.0005 mg/s/V when FS is 2.5 mg/s
Power supply voltage 12 … 28 Vdc, single or dual
Power consumption < 150 mW
Output signals 0 to 5 Volt analogue
Mass < 425 g (including signal conditioning electronics)
Fluidic interface Weldable 1/8” or 1/4” tube stub or screwed AS4395 fitting
Structural interface 4 bolts, M3 … M5
Electrical interface 15-pins Sub-D connector
Wetted materials AISI 316L
Environmental qual. temp. range-45 … +70 °C non-operating
-30 … +60 °C operating
EMC requirements According MIL-STD-461E
