Float switch with ATEX approval

UniEx.SS_Float switch with ATEX appovalFloat switches with ATEX approval are suitable for the use in explosive media and atmospheres according to Directive 2014/34/EU.
Float switches are passive devices. They do not require a power supply. All standard ATEX devices are offered for a temperature range of -20°C to +105°C in the medium, or -20°C to 70°C above process connection. Our high temperature devices are suitable for an operating temperature of -40°C to +180°C. UniEx.SS float switches are manufactured according to customer requirements and can therefore be individually configured and used for a wide range of applications.

Simply configure and request UniEx.SS now without obligation or arrange a consultation appointment!

Float switch in combination with temperature switch/sensor
Optionally, the UniEx.SS series devices can be equipped with temperature switches or sensors. Both temperature switches, which open or close at a desired temperature, and temperature sensors, such as PT100/PT1000, can be combined with the float switch.

 Data sheet UniEx.SS 105°

 Data sheet UniEx.SS 180°


 Temperature range from -20°C to 105°CTemperature range from -40°C to 180°C
  ATEX certification

BVS 21 ATEX ZQS/E377 Production Quality Assurance Notification
BVS 15 ATEX E 086 X EU-Type Examination Certificate

  Applied standards EN IEC 60079-0:2018 General requirements
EN 60079-11:2012 Intrinsic Safety “i”
EN 60079-26:2015 Equipment protection level (EPL) Ga

  ATEX marking

CE 0158 2000px EX Logo II 1/2G Ex ia IIC T3...T6 Ga/Gb
CE 0158 2000px EX Logo II 1/- D Ex ia IIIC T* °C Da
CE 0158 2000px EX Logo II 1 D Ex ia IIIC T* °C Da

  Electrical connection   
e. g. aluminium housing, stainless steel housing, plug-type connector, sheathed cable
for details please see data sheet UniEx.SS 105°
aluminium housing
For details please see  data sheet UniEx.SS 180°
  Process connection
e. g.  thread, flange
for details please see data sheet UniEx.SS 105°

  Tube ø 12 mm, material stainless steel 1.4571
further materials on demand

  Tube length
according to specification, max. 3000mm | max. 3000 mm

  Float ø 45 x 52 mm cylinder, stainless steel 1.4571
ø 52 mm bullet, stainless steel 1.4571

  Reed contacts max. 6x n.o. contact / n.c. contact or change-over contact

  Switching capacity

30V / 100 mA – Ex barrier mandatory!
To be operated in intrinsically safe circuits - type of protection Ex i!

  Pressure max. 40 bar

  Protection rating
IP 65

IP 66
  Operating temperature

-20°C to 105°C in medium
-20°C to 70°C above process connection

-40°C to 180°C

Optional: temperature switch / temperature  sensor

  Temperature switch Bi-Metal
  Switching function
normally closed / normally open contact
± 5°C, smaller tolerances on demand | reset-temperature = Temp.-switching point - 30°C ± 15°C
  Number of contacts
max. 2 temperature switches
  Switching capacity
30V / 100 mA – Ex barrier mandatory!


  Temperature sensor platinum resistor PT100 / PT1000 according DIN EN 60751, class B
  Nominal resistance
PT100: 100 Ohm | PT1000: 1000 Ohm
  Temperature coefficient:
  Tolerance class DIN EN 60751, class B
  Self-heating PT100: 0,4 K/mW | PT1000: 0,2 K/mW
  Long-term stability
  after 1000h at 150°C:
R0 Drift < 0,06 %

For further technical features and details as well as the ordering code, please see data sheet UniEx.SS 105° or  data sheet UniEx.SS 180°.

  • Level measurement in many liquid media, e. g. water, oil, fuel
  • Large field of application due to the proven functional principle:
    Monitoring of processes, predetermined levels as well as pumps and level controls
  • Chemical industry, petrochemical industry, mechanical engineering, shipbuilding industry, offshore facilities, energy plants and others
  • areas of application are, for example, barrier pressure vessels, agitators or printing machines
  • Temperature range from -40°C-180°C
  • High reliability an long life span
  • The float switch may only be operated with certified intrinsically safe circuits with the permissible maximum values.
  • The device must be included in the periodic pressure/safety test of the container
  • The float switch must be electrically connected to the equipotential bonding system of the plant.

Get an individual consultation!

Vertriebsleitung Matthias Kuhn

Together we will find a solution that precisely suits you and your needs.
Call me for your individual consultation or request a callback!

Matthias Kuhn
phone: +49 (0) 73 89-90 92-22
mail: mkuhn(at)engler-msr.de

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D-72535 Heroldstatt

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