CSN® Ex flow heater type 801Ex

CSN® Ex flow heater for outputs up to 76 kW for heating flowing liquid and gaseous media and with integrated temperature monitoring.


Our CSN® Ex flow heater was developed for outputs of up to 76 kW and is ideal for heating flowing liquid and gaseous media. This heating solution is specially designed for use in potentially explosive environments and offers maximum safety and efficiency. With the integrated temperature monitoring of our electric instantaneous water heater, you have full control over the operating temperature to ensure a safe working environment.

Product benefits

  • Integrated temperature monitoring
  • Heating capacities up to 76 kW possible
  • Heating elements as tubular heating elements or cartridges
  • Approval for Zone 1
  • Type of protection Ex de
Also available with explosion protection

Technical data


Zone 1



Optional: EAC

Temperature class

T1 to T6

Ambient temperature range

Standard -20°C to +40°C

Power (kW)

0.5 to 76

Voltage (V)

up to 1000

Protection class

IP 54


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)

Materials Heating elements

Steel, 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

Steel (painted)

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


801F = for liquids

801GB = for gases, Ex zone on the heating element

801GN = for gases, no Ex zone on the heating element

Customised versions on request

The following certifications are available on request:

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