Tavis Corp. - Pressure Transducers for Crewed & Uncrewed Launch Vehicles

Whether monitoring feed line, tank ullage or atmospheric ascent pressures, Tavis transducers continue to provide reliable telemetry for the most critical payload launches. Measurements on the violent first stage, as well as upper stage propulsion pressures, are within reach using our rugged Variable Reluctance (VR) sensors. When success is the only acceptable outcome, consider a customized Tavis VR transducer for your launch requirements.

Existing designs provide capabilities such as:

Low change in pressure measurements with very high line pressure
Severe rocket motor vibration environment
High proof and reverse proof pressures
Custom frequency response characteristics
Extreme cold media interface
Wet – Wet capability without the need to coat or protect diaphragm (non-contact, metallic diaphragm without any electrical connections)

Manned & Unmanned Launch Vehicle Pressure Transducers

Unit of Measure

Items	10283	10345	10533	10539
Pressure Range¹	N/A 0 - 2.5 psid to 0 - 25 psid	N/A 0 - 30 psid	N/A 0 - 29 psid 0 - 67 psid	N/A 40 - 150 psia
Proof Pressure	N/A +15 psid to +125 psid -150% FS	N/A 0 - 45 psid	N/A +128 psid +158 psid -25 psid	N/A 360 psia
Line Pressure	N/A 80 – 200 psig	N/A 14.7 psia	N/A 85 psia / 105 psia	N/A
Burst Pressure	N/A >350 psig to >2500 psig	N/A >60 psid	N/A >>263 psia	N/A >>600 psia
Sensor Type	N/A Variable Reluctance
Weight	N/A 340 g Nominal	N/A 640 g Nominal	N/A 1175 g Nominal	N/A 200 g Nominal
Wetted Materials	N/A 300 series CRES 400 Series CRES Inconel 600/625	N/A 17-4 PH CRES 300 series CRES Inconel 600/625	N/A Inconel 600/625	N/A Inconel 718
Construction	N/A Secondary Barrier All-welded Gage Metal Diaphragm Differential Wet - Wet	N/A Secondary Barrier All-welded Gage Metal Diaphragm Differential Wet - Wet	N/A Secondary Barrier All-welded Gage Metal Diaphragm Differential Wet - Wet	N/A Secondary Barrier All-welded Gage Metal Diaphragm
Fittings / Ports	N/A ¼ Flared Tube Fittings @ 90º	N/A ¼ Flared Tube Fittings	N/A KC105-4 Flared Tube Fittings	N/A ¼ Flared Tube Ftg
Input Voltage	N/A 22 - 34 VDC	N/A 4.9 - 5.1 VDC	N/A 22 - 32 VDC	N/A 22 - 32 VDC
Output Signal	N/A 0.0 - 5.0 VDC	N/A 0.0 - 5.0 VDC	N/A -0.300 to 9.700 VDC	N/A 0.0 - 9.5 VDC
Power	N/A 6 mA Nominal	N/A <5 mA	N/A 17 mA Nominal	N/A 8 mA Nominal
Electrical Interface	N/A 4-pin MS3112 / MIL-C-26482 Connector	N/A 6-pin MSFC 40M39569 Connector	N/A 6-pin D38999 Series III Connector	N/A 6-pin D38999 Series III Connector
Reverse Polarity Protection	N/A Yes
Isolation	N/A >50 MΩ @ 100 VDC	N/A >50 MΩ @ 50 VDC	N/A >100 MΩ @ 100 VDC	N/A >50 MΩ @ 100 VDC
Output Impedance	N/A 300 Ω Nominal	N/A 600 Ω Nominal	N/A <500 Ω	N/A 400 Ω Nominal
EMI	N/A NASA CS-EMC-1A Test Methods 3001, 3002, 4001, 5001, 5002, 5006, 6001	N/A CE01, CE02, CE03, CE04, CS01, CS02, CS06, RE01, RE02, RS02, RS03, ESD MIL-STD-461	N/A CE01, CE03, CE07, CEXX, RE01, RE02, CS01, CS02, CS06, RS02, RS03, ESD MIL-STD-451	N/A CE01, CE03, CE07, CS01, CS02, CS06, RE01, RE02, RS02, RS03, ESD MIL-STD-461
Compensated Temps	N/A -65 ºF to +165 ºF	N/A -30 ºF to +150 ºF Survival Operation: -150 ºF to +250 ºF	N/A -65 ºF to +172 ºF	N/A -65 ºF to +172 ºF
Vibration	N/A 57 grms Random 40 grms Sine @ 50 - 100 Hz	N/A 26 grms	N/A 66.2 grms 6.8 g²/Hz @ 625 - 800 Hz	N/A 55.5 grms 8.0 g²/Hz @ 125 - 180 Hz
Acoustic	N/A	N/A 155.4 dB OA SPL	N/A	N/A
Media	N/A All Non-Corrosive	N/A He, O₂, N₂, Air	N/A He, O₂, N₂	N/A He, O₂, N₂, H₂
Static Error Band²	N/A ±1.0% FSO Max	N/A N/A	N/A ±0.4% FSO	N/A ±0.5% FSO Max
Thermal Error²	N/A 0.01% FSO/ºF	N/A	N/A ±1.5% FSO	N/A <0.01% FSO/ºF
Total Error Band (TEB)²	N/A	N/A ±1.0% FSO	N/A	N/A
Frequency Response³	N/A	N/A -3 dB @ 20 Hz -6 dB/Octave Custom: Flat to 5+ Hz, rolling off	N/A Custom: -3 dB between 1.75 Hz and 2.65 Hz	N/A -3 dB @ 15 Hz -4.5 dB/Octave Custom: Flat to 5 Hz, rolling off
¹ The designs above are intended to convey just a few capabilities currently used on launch vehicles for discussion purposes. Tavis specializes in custom configurations and capabilities for your specific application. Discuss your application requirements with our engineers – we are here to make your future launches uneventful. 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.