711.12 differential pressure gauge with bourdon tube WIKA

Description

711.12 WIKA differential pressure gauge with Bourdon tube is used for pressure measurement of gaseous and liquid media.

The differential pressure gauge is based on two independently operating Bourdon gauging systems. The instrument can display the pressure from two measurement points and the resulting differential pressure on one screen.

Differential pressure display
The standard version is designed with two pointers and a pressure scale. The minus link indicator is connected to an additional movable button. The differential pressure (± 50% of the total scale value of the main scale) can be read directly on the scale of the movable knob.
In the version without the additional movable knob, the differential pressure is not displayed.

In the countdown stroke version, the differential pressure is displayed with only one pointer (the individual plus and minus pressures of the connection are not shown).
The variation of scale versions ensures optimum readability of all operating parameters.

Models 731.12 and 733.02 with stainless steel wetted parts are specially designed to meet the needs of the process industry.

For difficult working conditions (e.g. vibrations), instruments are also available with an additional liquid refill.

 

711.12 Features

• Nominal size in mm: 100, 160
• accuracy class: 1.6
• scale range: 0… 0.6 mbar to 0… 1000 bar
• pressure limitation:
  • Continuous: full scale value
  • Niha: 0.9 x total scale value
  • Short time: 1.3 x total value
• permissible temperature
  • Environment: -20 °C … +60 °C
  • Medium:
    • +60 °C maximum (soft soldered)
    • +100 °C maximum (soldering)
• Temperature effect:when the temperature of the measuring system deviates from the reference temperature (+20 °C): max. ± 0.4 %/10 K full scale value
• ingress protection according to IEC 60529/EN 60529: IP33
• process connector:
• Copper alloy
  • Bottom bracket, 2 x G ½ B (male), SW 22
  • Plus rear link, minus front link (identified by ⊕ and ⊖)
• pressure elements:
  • <100 bar: Copper alloy, type C, brazed
  • ≥ 100 bar: stainless steel, spiral, lined
• movement: copper alloy, wear parts argentan
• dial: aluminium, white, black lettering
• index finger:
• ⊕ side: front 1 standard pointer, aluminium, black
• ⊖ side: 1 pointer on the scale at the rear, aluminium, red, with 50% of the scale volume as ⊕ and ⊖ differential pressure display
• housing: steel, black
• window: glass for instruments
• ring: sliding lining, steel, black

To view additional options and more technical features, we recommend viewing the attached pdfs. documents under the Documentation section.

 

Areas of use, applications

• heating, ventilation and air conditioning
• for gaseous and liquid agents which are not highly viscous or crystallising

ELPRO designation: MAN-711.12