Fischer MS10 – Vacuum Pressure Switch – liquids, gases

Fischer MS10 is rugged pressure switch for vacuum and overpressure monitoring of liquids and gaseous media, including aggressive media. It consists of 2 x adjustable setpoints changeover micro-switches.

It is equipped with corrosion and vibration resistant stainless steel diaphragm.


Fischer MS10 – high accuracy Pressure switch for vacuum monitoring

pdf-imagehigh accuracy, stainless steel diaphragm, with microswitches, vacuum & overpressure monitoring of liquids, gases
Make: Fischer Messtechnik (Germany)
Model: MS10


Fischer MS10 is rugged, industrial performance grade pressure switch with onboard dial indicator. It is suitable for monitoring overpressure and vacuum pressure of liquids and gaseous media.

MS10 combines high sensitivity, vibration resistant, corrosion-resistant metal diaphragm with 2 x change over micro-switch. This enable to employ the pressure instrument in variety of industrial and commercial applications.

Fischer MS10 - pressure switch for liquid, gas vacuum and overpressure monitoring
Fischer MS10 – pressure switch for liquid, gas vacuum and overpressure monitoring


Working Principle:

The measuring system of MS10 consists of two encapsulated and hydraulically coupled metal diaphragm. When the instrument is subjected to pressure, it causes a deflection proportional to the strength of pressure. Opposite side of the medium-touching diaphragm, a tappet returns the deflection to a motion work and the operating elements of the micro-switches.

When excessive pressure is applied, each metal diaphragm touch and limit itself to chassis of the capsule. This protect the transmitter from overpressure.


Key Features:

  • 2 x change-over microswitches
  • High repeatability of micro-switches
  • Vibration resistant
  • Long service life
  • Rugged diaphragm system
  • Overpressure protected

Key Specifications:

  • Measuring range: -200 ~ +200 mbar to -1 ~ +24 bar
  • Nominal pressure: 25 bar
  • Max. pressure: overpressure proof to nominal pressure (all measuring ranges), vacuum proof up to fine vacuum 10-2 mbar
  • Leakage rate: ≤ 10-5 Pa.m3/s
  • Permissible ambient temperature: -10° C ~ +70° C
  • Permissible media temperature:  + 70° C
  • Protection class: IP54 per DIN EN 60529
  • Accuracy: ± 2.5% full scale
  • Output contacts: 1 or 2 micro-switches, 1-pole changing contacts, adjustable
  • Switching hysteresis: approx. 2.5% full scale
  • Electrical connection: cable terminal box
  • Pressure connection: KF10 small flange pipe connection DIN 28403 and ISO 2861
  • Measuring system: metal diaphragm measuring system, welded
  • Pressure chamber: stainless steel 1.4404
  • Measuring diaphragm: 1.4571, DURATHERM
  • Materials, wetted inner parts: stainless steel 1.4404, 1.4571


Industrial areas:

  • Process engineering
  • Environment engineering
  • Renewable energy eg. biogas etc
  • Waste Water Engineering
  • Effluent treatment
  • Breweries, alcohol industry