Position detectors
www.crouzet.com
21
Pressure decay sensor
■
100
% pneumatic
Also available in
ATEX
version for use in poten-
tially explosive atmospheres in accordance with
94/9/EC Directive
Pressure decay sensor
81 504 025
Symbol
Characteristics
Operating pressure
Flow at 6 bars
Tripping point
with 6 bar supply
Connection
Operating temperature
Mechanical life
Weight
Connections
bar
NI/min
b
2
➞
8
200
0.3
Sub-base page 54-55
°C
-5
➞
+50
≥
10
7
operations
25
g
Without flow restrictor
With flow restrictor
2
Principle of operation
Fitted in-line between the cylinder and the
control valve, the sensor will give an output
when the pressure in this line is exhausted
and the cylinder is at end of stroke.
For the correct usage of sensors on a falling
pressure, it is recommended that the practical
cylinder load is limited to 60% of the theore-
tical force.
Signal
when
cylinder
is in
Signal
when
cylinder
is out
Evolution of pressure within a double-acting cylinder
Pressure
in the cylinder
Circuit
pressure
Working pres-
sure
Pressure
difference
Operation of
the sensor on a
fall in pressure
Exhaust
pressure
Cylinder
response time
Cylinder travel
time
End of stroke
Time
Control valve Starting point
changeover of cylinder
Dimensions
81 504 025
ATEX
version products are available in the following catologues:
Pneumatic products for explosive atmospheres
or on our website
www.crouzet.com
22
www.crouzet.com
Low force position detector
■
■
■
■
100 % pneumatic
Conforme à la nore DIN 41365 Forme A
Faible effort d'actionnement < 50 g à 6 bars
Pas de consommation permanente d'air
comprimé
Also available in
ATEX
version for use in poten-
tially explosive atmospheres in accordance with
94/9/EC Directive
Function
NO
NC
81 290 501
-
-
81 290 001
Symbol
Characteristics
Orifice diameter mm
Operating pressure
Flow at 4 bars
Activation force at 6 bars
Permissible fluids (air / inert gas)
Max/min
of fluid
temperatures operating
storage
Mechanical life at 6 bars
Response
on activation
time
on release
Barb connection for semi-rigid tubing
Weight
Principle of operation NC
Desactivated
bar
NI/min
N
°C
°C
°C
operation
ms
ms
g
2
3
➞
8
100
< 0,5
l
2
3
➞
8
100
< 0,5
l
-10
➞
+50
-10
➞
+60
-40
➞
+70
10
7
≤
15
≤
15
2.7 x 4
8.5
-10
➞
+50
-10
➞
+60
-40
➞
+70
10
7
≤
15
≤
15
2.7 x 4
8.5
Activated
2
161 E
with roller R 24.1
70 507 529
S
(2)
(1)
Operation accessories
Unless otherwise requested, flat and roller-ended levers
are supplied loose.
161 A
flat R 25.4
70 507 524
Dimensions
2.5 Course
2.5
Total travel
totale
Course totale
DIN 41635 Form A
161 A
R 25.4
Tripping point
Position d'action
Position d'action
Position
Position repos
Rest point
repos
±0.2
±0,2
161 E
R 24.1
±0.2
±0,2
6.3
6.3
4.3
4.3
Ø3
+0.05
Ø3
+0.05
+0.15
+0.15
30
3.8
3.8
30
2.4
R
2.4
R
R
R
3.4
Ø4.8
Ø4.8
8
8
5 11.811.8
±0.5
14.714.7
3.2 3.2
16 16
10.310.3
20 20
3.4
5.8
5.8
12.95
12.95
22.2
22.2
3.4
3.9
3.9
ATEX
version products are available in the following catologues:
Pneumatic products for explosive atmospheres
or on our website
www.crouzet.com
www.crouzet.com
10.710.7
3
+0.05
3
+0.05
+0.15
+0.15
5
16.516.5
±0.5
3.4
23
“Microvalve” series position detectors
■
100
% pneumatic
81 280
81 281
Version
Symbol
NO
Features
NO
NC
81 280 010
81 280 510
Horizontal output
81 281 010
81 281 510
Vertical output
-
81 283 510
Rear connection by screw
NC
Characteristics
2
Operating pressure
Orifice diameter
Flow at 6 bars
Operating force at 6 bars
Effective travel
Push-in connection for
semi-rigid tubing (NFE 49100)
Operating temperature
Mechanical life
Weight
Principle of operation
bar
mm
NI/min
N
mm
mm
°C
operat.
g
2
→
8
2.7
200
15
1
Ø4
-5
➞
+50
5 x 10
6
14
NC
2
→
8
2.7
200
15
1
Ø4
-5
➞
+50
5 x 10
6
14
2
→
8
138
15
1
Ø4
-5
➞
+50
5 x 10
6
20
NO
PFC
PRT
Actuation positions :
PFC
PA
PRT
PR
:
:
:
:
End of travel position
Operating position (max output kV)
Release position (max. exhaust kV)
Rest position
Dimensions
81 281 010 - 81 281 510
81 280 010 - 81 280 510
81 283 510
PR
PA
o
5,2
11,5 11,5
002645P2
24
www.crouzet.com
“Microvalve” series position detectors
■
100
% pneumatic
Features
Version
NC
Vertical output
Short lever
81 281 502
With ball
81 281 504
Roller trip
81 281 508
With roller
81 281 509
Threaded barrel Ø 16
Plunger
81 737 501
Symbol
Characteristics
Operating pressure
Orifice diameter
Flow at 6 bars
Operating force at 6 bars
Effective travel
Push-in connection for
semi-rigid tubing (NFE 49100)
Operating temperature
Mechanical life
Weight
Dimensions
81 281 502
81 281 504
81 281 508
bar
mm
NI/min
N
mm
mm
°C
operat.
g
2
→
8
2.7
200
15
1
Ø4
-5
➞
+50
5 x 10
6
16
2
→
8
2.7
200
15
1
Ø4
-5
➞
+50
5 x 10
6
18
2
→
8
2.7
200
15
1
Ø4
-5
➞
+50
5 x 10
6
18
2
→
8
2.7
200
15
1
Ø4
-5
➞
+50
5 x 10
6
18
2
→
8
2.7
200
25
1
Ø4
-5
➞
+50
5 x 10
6
90
2
Ball Ø 9
PR
81 281 509
81 737 501
Max. fixing capacity
18 mm
2 nuts 21 mm across flat
PR
PR
PR
Actuation positions :
PR
PR : Rest position
www.crouzet.com
PR
25
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