Fischer DS11 – DP Gauge cum Switch

Fischer offers DS11 differential pressure gauge cum switch and dial indicator, ideal for non-corrosive media like gases, water, lubricants, oil, liquids. It is used for differential pressure, vacuum pressure, flow, level monitoring.

Due to rugged design, it is ideal for commercial and industrial applications, including chemical, HVAC & R, cement, water treatment etc industries.


Fischer DS11 Differential Pressure Gauge cum Switch pdf-image

for flow measurement of all liquids, lubricants, chemicals, oil flow indicator
Make: Fischer Messtechnik (Germany)
Model: DS11

Fischer DS11 - DP Gauge cum Switch for pressure, flow, level monitor
Fischer DS11 – DP Gauge cum Switch for pressure, flow, level monitor

Fischer DS11 is state of art, rugged and continuous performance oriented differential pressure gauge cum switch.   It has dial gauge indicator with inbuilt contact switch, thus measuring as well as controlling pressure, differential pressure, vacuum pressure, flow of water, liquid and gases media.

Thus, DS1102VD is used by many companies including Siemens / Flender in volume flow monitoring system for mill lubricant, oils etc in cement plants, power plants etc.

Working Principle:

Differential pressure instrument works on principle of movement of rugged and sensitive diaphragm. The pressure or differential pressure to be measured creates an unbalanced forces of diaphragm springs for measuring range until new balance is reached.

A centre mounted tappet transfers motion of the diaphragm system to indicator movement, as further initiate microswitches depending upon preset control limits.

Key Features:

  • High repeatability of switching points
  • Long service life
  • High overpressure protection
  • Robust design with high repeatability

Key Specifications:

  • Measuring range: 0-400 mbar to 0-25 bar
  • Operating temperature: Ambient: -10°C to +70°C; Media:+70°C
  • Protection class: IP54 per DIN EN 60529
  • Contact outputs: 1 or 2 micro switches, adjustable
  • Switching hysteresis: Approx 2.5% Full scale
  • GL type approved, acc. to SEV guidelines
  • Static operating pressure: 25 bar
  • Measuring Diaphragm / Gaskets: NBR / NBR, or Viton / Viton (all ranges up to 16 bar);
  • Measuring Diaphragm / Gaskets: DURATHERM / NBR, or DURATHERM  / Viton (all ranges up to 25 bar)
  • Pressure Chamber:  Aluminum HART-COAT, Chrome nickel steel 1.4305
  • Pressure connection: Female thread G 1/4
  • Electrical connection: Cable Terminal box

Applications areas:

  • Measurement of differential pressure between forward and return flow in heating systems
  • Observation of filters and pumps

Industrial areas:

  • Commercial and industrial building
  • Water supply
  • Cement plants
  • hydro power plants
  • Manufacturing and chemical plants