PDD
Page 4
PDD K04/0217
5. Operating Principle
KOBOLD pressure sensors / switches series PDD are cost effective electronic
pressure switches with digital indication of actual pressure. Two switch points, on
/ off-switch delay and hysteresis that are within the measuring range are
programmable.
A piezo resistive ceramic sensor is used. The units can be used where high
switching accuracy is needed. Long-term stability, repeatability and the compact
and robust design makes it an ideal unit for use in OEM applications.
6. Mechanical Connection
The pressure tappings should be prepared according to the following
specification for the screw-in holes.
For the purpose of sealing, disc-sealing (DIN 16 258) or profile sealing may be an
adequate choice. The correct torque depends on the material, and the form of the
seal and the pressure connection of the pressure sensor.
The mounting place should be free from strong vibrations and radiant heat.
The admissible site conditions of pressure sensors are to be maintained.
After making pressure connection and electrical connection, the sensors are
ready for use.
G 1/2 A
R 16
z
* min.
Sealing (DIN 16288) Flat sealing
7
+0,2
G 1/2 A
R 16
z
* min.
7
+0,2
21,3
-0,2
G 1/4 A
R 16
z
* min.
7
20
,5
14
5
14
5
19
24
5
24
5
13
16
5
9
+0,2
-
0,5
-
0,5
-
0,5
+1
+1
+1
