4
• The product must be suitable for the corresponding applications and
environmental conditions without any restrictions�
•
Only use the product for its intended purpose (→ Functions and features).
•
Only use the product for permissible media (→ Technical data).
• If the operating instructions or the technical data are not adhered to, personal
injury and/or damage to property may occur�
• The manufacturer assumes no liability or warranty for any consequences
caused by tampering with the product or incorrect use by the operator�
• Installation, electrical connection, set-up, operation and maintenance of the unit
must be carried out by qualified personnel authorised by the machine operator�
• Protect units and cables against damage�
3 Functions and features
The unit monitors the system pressure/differential pressure in compressed air
networks and pneumatic systems of machines and plants�
Avoid static and dynamic overpressure exceeding the specified overload
pressure by taking appropriate measures�
The indicated bursting pressure must not be exceeded�
Even if the bursting pressure is exceeded only for a short time, the unit
may be destroyed� ATTENTION: Risk of injury!
Pressure Equipment Directive (PED): The units comply with section 3,
article (3) of the Directive 97/23/EC and are designed and manufactured
for media of fluid group 2 (stable gases and non-superheated liquids) in
accordance with the sound engineering practice�
3.1 Use of the main connection G1/8
Application:
compressed air (other media on request); type of pressure: relative
pressure
Order no.
Measuring range
Permissible
overload pressure Bursting pressure
bar
PSI
bar
PSI
bar
PSI
PQ3809
-1���1
-14�6���14�5
20
290
30
435
PQ3834
-1���10
-15���145
20
290
30
435
MPa = bar ÷ 10 / kPa = bar × 100
