CSN® screw-in heater type 95EX

Ex screw-in heaters up to 21 kW, type of protection Ex det, controller/limiter reset accessible from outside.


Our CSN® Ex screw-in heaters are designed for outputs of up to 21 kW and are ideal for heating liquid and gaseous media. These heaters are specially designed for use in potentially explosive environments and provide a reliable and efficient heat source. Thanks to their integrated temperature monitoring, they 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 ... T6

Ambient temperature range

Standard -40°C to +40°C

Power (kW)

0,2 ... 21

Voltage (V)

up to 1000

Protection class

IP 66


Liquid and gaseous

Process data

Medium, pressure and temperature according to specification

Process connection

Screw-in thread: ISO 228, G 1 ½", G2", G 2 ½" as standard

Heating elements

Tubular radiators

Cartridge radiators

High-performance cartridge heaters

Materials Process connection

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) and 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:

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