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GARNET PRESSURE AND TEMPERATURE SENSOR

The easiest way to monitor your propulsion systems

The Garnet propellant measurement unit combines pressure and temperature sensing as well as the signal conditioning electronics.
 
Designed as a seamless plug-and-play subsystem, it serves the critical function of assessing propellant levels from tank pressure and temperature throughout the lifecycle and particularly at end-of-life stages.

In addition to the multiple customization options, the unit comes in two main variants: analog output (Garnet-A) and digital output (Garnet-D).

GARNET PRESSURE AND TEMPERATURE SENSOR

Garnet Pressure Transducer

  • Radiation SEL immune

  • Manufactured to IPC3

  • Redundant seal design

  • Design and testing based on ECSS

  • High accuracy and reliability

  • Best-in-class on size and mass metric

  • SpaceX rideshare compliant (RPUG)

  • Availability off the shelf

USE CASE EXAMPLE

  • Multiple sensors, tracking the different pressure stages, tank and valve temperatures.

  • Single unregulated power bus compatible

  • Single digital communication bus minimizing use of OBC interfaces count.

Performance

Pressure range (MEOP)
Proof pressure

Burst pressure
Accuracy                                 


Temperature sensing

0 ... 10 bar, 30 bar, 100 bar, 200 bar, 320 bar
1.5 x MEOP

4 x MEOP
±0.25% FS at BOL
±0.4% FS at EOL (pending mission profile)
Internal thermistor (1 kΩ @ 25°C PTC)

Interface

Electrical interface    

Supply voltage

Current consumption

Output interface

Mechanical interface

Size

Mass

Wetted material

Fluidic interface

9-pin Nano-D-Sub (MIL-DTL-32139)

8 V - 34 VDC

< 10 mA                                                         

0 V - 5 V (analog)

2  x M3 fasteners                         

62 mm x 36 mm x 36 mm

Starting from 110 g

AISI 316L

1/4" weldable tube

Environmental

Temperature range     

                                                  

Radiation                         

Random vibration

Shock                                

Compatibility 

-30 °C to +60 °C operational

-40 °C to +70 °C non-operational

TID > 30 krad, SEL immune

14.1 grms

SRS 1000 g (ECSS-E-ST-10-03C)

MON, MMH, ADN, HAN, HTP, N2O, Water, He, N2, Xe, Kr, Ar

Customizations

Electrical interfaces    

Fluidics interface        

Wetted material            

Pressure range              

Output interfaces

Analysis

Flying leads, custom connector

VCR, Swagelok tube fitting

Ti-6Al-4V, Hastelloy C-276  

Custom range and temperature calibration

0 V - 3 V (analog)

PSA, WCA, FIT, Structural

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