Hermetically sealed cell
83151
5
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6
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HERMETICALLY SEALED MICROSWITCH ES SINGLE POLE, CHANGEOVER TYPES 83 151
(150°C) AND DERIVA TIVES
PRESENTATION
This is the basic comporent for our whole range of standard 1-pole and 2-poIes hermetically-sealed limit swit-
ches plus the 3-poIes version (special Umit Switches).
The CROUZET hermetic microswitch combines a snap-action switching system with high resistance to shock
and vibration in an hermetically sealed miniature case which encloses an atmosphere of inert gas around its
contacts, ideal for switching very Iow level circuits and higher currents also.
The meticulous care taken in the manufacture of this hermetically sealed cell in terms of assembly processes,
cleanliness of components as well as inspection procedures, result in a product which is ideal for operation in
severe environments where a high level of reliability is essential.
The CROUZET hermelically sealed cell is particularly well suited to sectors such as Aerospace, Armaments,
Marine, Nuclear, etc.
Solder
Insert gas
filling
Solder
Compressed
glass seal
Diagram of snap-action device
ESSENTIAL CHARACTERISTICS
• Switching power from 1 mA to 7 A.
• Operating temperature: -55°C to 150°C : Type 83 151
-55 °C to 250°C : Type 83 1512
• Operating pressure : 1 bar : Type 83 151
From 2 to 6 bars : Type 83 1515
• Vibration resistant up to 80 g.
• Shock resistant up to 200 g.
• High level of hermetic sealing: Leakage < 1 × 10
-6
cm
3
He/S
• Long life: 200,000 cycles.
• Small size: ø 11 x 16.
• Numerous single pole and multipoles operating and fixing options.
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DISTINCTIVE CHARACTERISTICS
F.daN
Mechanical strength
8
7
6
5
4
3
2
Tolerated overtravel
forces
Total
No abrupt increase in the total travel of the
device is noted under rising overtravel forces
of up to 80 N. On return to a normal overtravel
force of 20 N after these measurements have
been carried out on one and the same device, the
total travel will be observed to have varied only
very little (low permanent set).
The device can be damaged if the overtravel
force is pushed up to 150 N.
0
0.27
0.28
0.29
0.30
0.31
0.32
0.33
0.34
0.35
travel
in mm
Hermetic sealing
• The microswitch is filled with inert gas (nitrogen-hydrogen mixture), the internal pressure being 1 bar.
• The hermetic sealing (membrane-cap - cap-base) is achieved with a continuous seam welding bead.
• 1 x 10
-8
atm cm
3
/s
FC (N)
6
Increase in operating force
+2
Change in operating force as a function of
ambient temperature and pressure.
0m
m
Hg
5
4
3
2
50°
°C
C
150
40
0
θ°C
76
0
0
1
0
-1
-2
200
50
25° ° C
C
-50
°C
400
600
760
P (mm Hg)
200 150 100 50
The force values of our hermetically sealed
microswitches are influenced by ambient pressure
and temperature; we give the value, for the base
cell, for the increase in operating force (∆ OF) as a
function of these two parameters.
The characteristics are stated for normal
temperature (23°C) and atmospheric pressure at
sea level (760 mm Hg).
Our hermetically sealed microswitches can be used
from atmospheric pressure to absolute vacuum;
some variants allow use at higher pressures.
Reliability of characteristics
Below are two test extracts showing the stability of the essential characteristics over time and as a function of
temperature.
0.5 N
F
Operating force
Release force
T°=150°C
Travels and forces
0.5 N
Change in the characteristics
concerned under a constant load of
25 Newtons applied to the operating
device.
Rest position
0.02 mm
Release position
Operating position
Overtravel position
5 days
Time
8
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Voltage drops
mV
t°- 55°C
t° +150°C under 50 mm of Hg
7A resistive 29V
Voltage drops
100
Change in this characteristic in accordance
with Air 8459 method - for 1.5-4 and 7 Amp
load.
Ambient
temperature
20°C
4A resistive 29V
50
1.5A inductive 29V
No. of
operations
0
50000
100000
CONNECTIONS
Electrical connections are made through the base, by three ferronickel terminals, with copper core,
W2
W2N
sealed by compressed glass.
Welded
Wired
Epoxy resin coating
Epoxy resin coating
W2
W2N
Epoxy resin coating
parallel to
to axis (//)
perpendicular to
axis (⊥)
( )
parrallel
axis (//)
perpendicular
Electrical diagram (actuator at rest
position)
green wire C
parallel to axis (//)
Dimensions
Ø 11
- 0
+ 0,25
NC black wire
NO red wire
perpendicular to axis ( )
(01) - Rest position
(105) - 3 terminals
Ø 1.3 at 120°
Wires: 0.38 mm
2
Air 4524 - length 0.50 m.
Category 140° 170°C.
PERFORMANCE DATA
Product characteristics
Min. current
Nominal current
Resistive
Lamp
Lamp
Resistive
Inductive L/R = 0.005 s
Resistive
Inductive - cos
ϕ
0.8
Service life at nominal current
(3)
- cycles
Dielectric rigidity between connections and earth
Rigidity between connections
Insulation resistance (at 500 V DC)
Voltage drop at 1 A
(2)
Operating temperature
Shock resistance
(3)
Vibration resistance
(1) For a service life of 100,000 cycles - Permitted current 4 A inductive 7 A resistive in contactor or breaker.
(2) Over welded connections - for wired connections add 0.1 V per metre.
(3) Value for microswitch without auxiliary actuator
Value
1
3
1
2
3
1.5
1
0.4
200 000
1200
1000
100
0.02
-55 +150
200/11
80/20
→
2000
Unit
mA
A
A
A
A
A
A
A
V
V
MΩ
V
°C
g/ms
g/Hz
4,5
0,20
15,7
+ 0,30
-
Under
5 V DC
48 V DC
(1)
115 V - 400 Hz
30 V DC
(1)
30 V DC
(1)
30 V DC
(1)
220 V AC
220 V AC
9
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