M.8 Explosion-protected ATEX pressure switches

Product catalog summary

Overview: This document provides technical specifications and certifications for explosion-protected pressure switches designed according to the ATEX directive 2014/34/EU and the IECEx scheme. These switches are suitable for use in hazardous environments with gases, vapours, dust, and mining applications.

Certifications: The pressure switches are certified for various Ex zones:

Types 0165, 0342/0343: Zones 1 + 2 for gases and vapours.
Types 0340/0341: Zone 22 for dusts.
Types 0342/0343: Zones 21 + 22 for dusts and M2 for mining (methane/coal dust).

Technical Specifications:

Temperature Resistance: Varies by material, ranging from -20°C to +80°C.
Switching Frequency: 200 operations per minute.
Mechanical Life Expectancy: 1,000,000 cycles.
Pressure Rise Rate: ≤ 1,000 bar/s.
Protection Class: IP65.
Housing Material: Options include aluminium and zinc-plated steel.

Electrical Specifications:

Rated Working Voltage: Up to 250 VAC/DC.
Rated Insulation Voltage: 300 V.
Rated Impulse Withstand Voltage: 4 kV.

Design and Features: The pressure switches feature a compact design with user-adjustable switching points. They offer a good price-performance ratio and are available with different housing materials and seal options to suit various applications.

Applications: These switches are suitable for environments where explosive gases, vapours, or dusts are present, including industrial and mining settings. They are designed to operate safely in potentially explosive atmospheres, ensuring compliance with relevant safety standards.

Catalog excerpts

M.8 Explosion-protected ATEX pressure switches-1

Explosion-protected pressure switches according to ATEX directive 2014/34/EU and IECEx scheme ATEX certification for the Ex-protected zones: - 1 + 2 (Gases and vapours) - 21 + 22 (Dust) - M2 Mining (Methane / coal dust) Types 0342/0343 are certified according to IECEx scheme Switching point can be easily adjusted by the user while system in operation Compact design Excellent price-performan

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M.8 Explosion-protected ATEX pressure switches-2

Technical explanations Explosion-protected pressure switches are classified according to the respective combustible material-type. This division is: Gases and vapours 0165, 0342 / 0343 Dusts 0340 / 0341,0342 / 0343 Methane / coal dust 0342 / 0343 ATEX/IECEx marking for pressure switches Our pressure switches are designed for gases and vapours (G), dust (D) and methane / coal dust (M) in mining: Flammable materials Gases and vapours Dusts Gases and vapours Dusts Methane / coal dust The following table shows an overview of the explosion protection zones, device groups and categories. The applications...

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M.8 Explosion-protected ATEX pressure switches-3

Explosion-protected pressure switches Technical details Type Elektrische Werte

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M.8 Explosion-protected ATEX pressure switches-4

0165 Diaphragm / piston pressure switches up to 250 V ATEX 0102 C€ © II 2G Ex d II C T6 /T5 X (gas-protected zones 1 and 2) • Aluminium housing • Changeover with silver contacts • Operating voltage up to 250 V • Overpressure safety up to 200 / 600 bar1) Seal material - Application areas Refer to page 82 for the temperature range and application thresholds of sealing materials. Piston pressure switches only have limited suitability for use with gases (refer to Page 17 for explanations). Contact assignment: O 1 = white 0 2 = green 0 4 = brown 1) Static value. Dynamic value is 30-50 % lower. Values...

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M.8 Explosion-protected ATEX pressure switches-5

Contact assignment • 1 = black 0 2 = red 0 4 = white 0340 / 0341 Diaphragm / piston pressure switches up to 250 V ATEXCC © II 3D Ex tc MIC T90°C Dc (dust-protected zone 22) • Zinc-plated steel housing (CrVI-free), with anodised aluminium protective cap • Changeover with silver contacts • Operation voltage up to 250 V, protection class 2, protective insulation IH] • Overpressure safety up to 300 / 600 bar11 0341 Piston pressure switches 60011 Seal material - Application areas NBR Refer to page 82 for the temperature range and application thresholds of sealing materials. Piston pressure switches...

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M.8 Explosion-protected ATEX pressure switches-6

0342 / 0343 Diaphragm / piston pressure switches up to 250 V acc. to IECEX scheme ATEX C€ ©II 2G Ex db IIC T6 /T5 Gb (gas-protected zones 1+2) ATEX C€ ©II 2D Ex tb MIC T80°C/T100°C Db (dust-protected zones 21 + 22) ATEX C€ ©I M2 Ex db I Mb (mining) • Operation voltage up to 250 V, protection class 2, protective insulation [□] • Overpressure safety up to 300 / 600 bar1) • Certification according to IECEx scheme Article number 0342 Diaphragm pressure switch 0343 Piston pressure switch Seal material - Application areas Refer to page 82 for the temperature range and application thresholds of sealing...

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