Galden® DET detector fluid is used in gross leak testing as the low boiling fluid. 

Galden® PFPE Hermetic Seal Testing

Hermetic Seal: The Test

Electronic devices must be completely sealed to avoid penetration by moisture and potential damage of the electrical response of the silicon chip.

To guarantee the hermeticity of devices, a leak test procedure has been defined and ruled by MIL-STD 883, MIL-STD 750, and MIL-STD 202.

Galden® PFPE fluids being extremely inert and residue free are ideal and widely used as detector and indicator fluids in leak test procedures.

Galden® DET

Detector fluid is specifically designed for high-reliability measures.

Galden® DET, Type I and III detector fluid offers higher reliability with respect to traditionally used fluids.

Galden® DET, thanks to its perfect balance between low and high boilers components, can easily detect large and small leaks:

• High boilers enter through large leaks and remain liquid until the test is performed
• Low boilers can easily penetrate into small leaks

Galden® D02 and D03

Low consumption indicator fluids.

Galden® D02 and D03 can be advantageously used as Indicator fluids respectively in military and non-military applications.

• Higher boiling point
• Lower vapor pressure at test temperature

Will Result in ...

• Reduced evaporative loss
• Lower consumption compared to other commercially available indicator fluids

Hermetic seal testing

                                                                            Detector Fluids
Typical Properties                                           Units                   DET
Boiling point                                                    °C                         81
Pour point                                                        °C                     –110
Density at 25 °C                                            g/cm³                   1.70
Density at 125 °C                                          g/cm³                      –
Kinematic viscosity at 25 °C                            cSt                      0.60
Kinematic viscosity at 125°C                           cSt                         –

Specific heat at 25 °C                                    J/Kg·°C                  973
Thermal conductivity at 25 °C                      W/m·°C                  0.07
Coefficient of expansion                         cm³/cm³·°C                0.0011
Surface tension                                            dyne/cm                   16
Dielectric strength                              kV (2.54 mm gap)              40
Dielectric constant                                                                        2.1
Volume resistivity                                       Ohm· cm                    5·10¹⁵

Average molecular weight                             amu                        430

Typical properties (Not for specification purpose)

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