Differential pressure gauge
Model
DP80, with magnetic piston
Application
● For gaseous and liquid media that are not highly viscous or crystallising
● Filter systems
● Pump monitoring
● Cooling circuits
● Pipeline systems
Special features
● Differential pressure measuring ranges 0 ... 400 mbar to 0 ... 10 bar
● Compact system case from stainless steel, suitable for high working pressures (static pressures), optionally 100, 250 or 400 bar
● Overload safety either side to maximum working pressure
● System and indicator case exchangeable on-site
● Up to 2 reed contacts can be retrofitted and adjusted on-site
Illustrations of the principle
Mounting according to affixed symbols
⊕ high pressure, ⊖ low pressure
Pressures p1 and p2 act on the ⊕ and ⊖ side of the measuring chamber, separated by the pressure-loaded magnetic piston or magnetic piston。
The difference in pressure causes an axial movement (deflection) of the piston supported by the measuring range spring.
An annular magnet mounted on the instrument pointer follows the magnet integrated in the piston so that each piston position is assigned a defined position of the pointer.
This design enables the complete mechanical separation of the measuring system and the indication while eliminating any leakage to the outside.
With the volume flow from the ⊕ to the ⊖ side in the measuring chamber is minimised by the mechanical design and will not interfere with standard processes.
Specifications
Nominal size(mm) | 80 | |
Scale ranges | 0 ... 400 mbar to 0 ... 10 bar | |
Indication accuracy | ± 3 % of full scale value with increasing differential pressure | |
Max. working pressure (static pressure) | ■ 100 bar ■ 250 bar ■ 400 bar | |
Overload safety | either side to maximum working pressure | |
Permissible temperature | Ambient: 0 ... +60 °C Medium: +100 °C maximum | |
Ingress protection per IEC/EN 60529 | lP54 | |
Wetted materials | Measuring chamber with pressure connection Stainless steel 1.4571, 2 x G ¼ female, on the right and left side, in-line (EN 837-1/7.3) ■ Other pressure connections via female or male threads ■ Lower mount or back mount, ⊕ connection left ■ Fine filter integrated into the ⊕ connection
Pressure element Compression spring, stainless steel 1.4310
Magnetic piston Piston Stainless steel 1.4571, magnet: Hard ferrite | |
Non-wetted materials | Dial Aluminium, white, lettering: Scale, outside black (bar), inside red (psi) Pointer Aluminium, black Window Clear non-splintering plastic, snap-fitted in case | |
Mounting | Mounting by means of: ■ Rigid measuring lines ■ Panel mounting flange ■ Instrument mounting bracket for wall mounting | |
Dimensions in mm
Model / Scale range / Scale / Process connection / Connection location / Overload limit (max. working pressure) / Options
