CSN® Ex flow heater type 95Ex

Ex flow heater with integrated, externally accessible temperature monitoring for outputs up to 21 kW.


Our CSN® Ex flow heaters are designed for outputs of up to 21 kW and are ideal for heating flowing liquid and gaseous media. These electric instantaneous water heaters are specially designed for use in potentially explosive environments and provide a reliable and efficient heat source. Thanks to their integrated temperature monitoring, you can precisely control the operating temperature and thus ensure a safe working environment.

Product benefits

  • Integrated, externally accessible temperature monitoring
  • Heating elements as tubular heating elements or cartridges
  • Approval for Zone 1 and Zone 21
  • Type of protection Ex det
  • Approval according to ATEX and IECEx. Further approvals (Peso, CCC, EAC) available
Also available with explosion protection

Technical data


Zone 1, Zone 21



Optional: Peso, CCC, EAC

Temperature class

T1 to T6

Ambient temperature range

Standard -40°C to +40°C

Power (kW)

0.2 to 21

Voltage (V)

up to 1000

Protection class

IP 66


Liquid and gaseous

Process data

Medium, pressure and temperature according to specification

Housing / inlet and outlet nozzles

Flange connections and others

Heating elements

Tubular radiators

Cartridge radiators

High-performance cartridge heaters

Housing materials

Steel; 1.4404 (AISI 316L);

1.4541 (AISI 321); 1.4571 (AISI 316 Ti)

Heating element materials

1.4404 (AISI 316L);

1.4541 (AISI 321); 1.4571 (AISI 316 Ti);

1.4876 (Incoloy 800); 2.4858 (Incoloy 825)

Material of connection cover

GGG40.3 (powder-coated)

Installation length of heating elements (mm)

300 - 3500 for tubular radiators,

up to 6000 for cartridge radiators

Temperature monitoring

Temperature controller (standard)

Temperature limiter (standard)

Optional: PT100, thermocouple


95F = for liquids

95GB = for gases, Ex zone on heating element

95GN = for gases, no Ex zone on the heating element

Customised versions on request

The following certifications are available on request:

Individual variants available on request.

Your contact persons

Your request

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