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Inconel 718 and 304L CRES materials are used in our satellite transducers because of their compatibility with caustic propulsion media such as MMH, NOX, MON-3, etc. Most satellite transducer designs manufactured by Tavis utilize a ¼-inch tube stub for orbital tube welding into the spacecraft manifold tubing. The tube stubs are typically seamless 304L or 321; however, some designs incorporate a Titanium-to-304L transition tube for use with Titanium spacecraft plumbing.




Existing designs provide capabilities such as:
  • High pyro shock tolerance for nearby valves and separation nuts
  • Inherent secondary barrier for burst pressure containment
  • High proof and burst pressure capability
  • Connector or pigtail configurations
  • EMI filtering and immunity
  • Compact size
  • Low power consumption for long orbit life requirements
  • Space-grade parts; radiation-hardened components and shielding
  • No mounting feet option, or one-piece case and mounting feet configurations
  • Soldering procedures based on NASA-STD-8739.3
Unit of Measure

General

Pressure Range1 N/A 30 psia to 6000 psia

Proof Pressure

 N/A >150% FSO

Burst Pressure

 N/A >>200% FSO

Sensor Type

 N/A Variable Reluctance

Weight

 N/A 255 gm Max

Wetted Materials

 N/A 304L/321 CRES Inconel 718

Construction

 N/A Electron Beam Welded Gage Secondary Barrier

Fittings / Ports

 N/A 1/4 Tube Stub 0.035 Wall

Electrical

Input Voltage

 N/A 24 - 32 VDC

Output Signal

 N/A 0.0 - 5.0 VDC

Power

 N/A 7 mA Nominal

Electrical Interface

 N/A MSFC 40M39569 (10-6)Connector

Reverse Polarity Protection

 N/A Yes

Isolation

 N/A >100 MΩ @ 50 VDC

Output Impedance

 N/A <1000 Ω

Environmental

EMI

 N/A MIL-STD-461C & MIL-STD-462:CE01, CE02, CE03, CE04, RE02, CS01, CS02, CS06, RS02, RS03, Transients, Ripple

Compensated Temps

 N/A -65 ºF to 200 ºF

Vibration

 N/A 15 grms

App Media

 N/A MON-3 N2H4 N2O4

Performance

Static Error Band2

 N/A ±0.5% FSO

Thermal Error2

 N/A ±0.01%/ºF Max Average
Total Error Band (TEB)2 N/A ±0.5" H2O @ 10" H2O ±1.0" H2O @ 30" H2O
Frequency Response3 N/A <100 ms
  • 1 The designs above are intended to convey just a few capabilities currently used on satellites for discussion purposes. Tavis specializes in custom configurations and capabilities for your specific application. Discuss your application requirements with our engineers for your spacecraft’s long-term success.
  • 2 Many error band definitions and limits are possible, and these actual error bands are too specific to delineate herein. A clear definition and understanding of any error band is critical, and many manufacturers’ published errors or accuracies can be very misleading. Please consult Tavis regarding your specific error band requirements.
  • 3 Frequency Response given is for electronics only. Actual frequency response will depend on pressure range and media.