Certified measurement and control technology for hazardous areas. Developed and manufactured in Germany, tested by TÜV Nord.
Wherever flammable gases, vapours, mists or dusts occur together with oxygen and an ignition source, an explosive atmosphere can form. The ATEX directive 2014/34/EU, the German Industrial Safety Regulation and the EN IEC 60079 series set the framework. The key terms at a glance.
Areas are classified by how often and how long an explosive atmosphere is present. Gases are divided into zones 0, 1 and 2, dusts into zones 20, 21 and 22. The lower the number, the more frequent the hazard.
The required category derives from the zone. Category 1 offers very high safety for the most hazardous zones, category 2 high and category 3 enhanced safety. G stands for gas, D for dust.
The Equipment Protection Level describes how likely a device is to become an ignition source. Ga and Da stand for very high, Gb and Db for high, Gc and Dc for enhanced protection.
The technical principle that prevents ignition. Examples include flameproof enclosure db, increased safety eb, intrinsic safety ia and ib, and protection by enclosure tb for dusts.
Gases are classified by ignitability into IIA, IIB and IIC, with the hazard increasing towards IIC. For dusts, IIIA, IIIB and IIIC apply, IIIC covering conductive dust.
It limits the maximum surface temperature of the device, from T1 at up to 450 °C down to T6 at up to 85 °C. The surface temperature must always stay below the ignition temperature of the medium.
Product directive 2014/34/EU addresses manufacturers and governs placing on the market. Workplace directive 1999/92/EC addresses employers and is implemented in Germany through BetrSichV and GefStoffV.
Employers must assess the explosion hazard, classify and mark areas into zones and prepare an explosion protection document before work begins. Installations are subject to recurring inspections.
Parts 10-1 and 10-2 govern zone classification for gas and dust, part 14 design and erection including initial inspection, part 17 recurring inspection and maintenance, part 19 the repair of equipment.
Answer three questions about your application. The configurator derives the correct equipment category, protection level and type of protection according to ATEX 2014/34/EU from substance, zone and application, and recommends suitable SEIKOM products.
NLSW series for zones 1 and 2, with relay or analogue output. Evaluation unit and Zener barriers included.
Certified sensors and evaluation units for precise flow measurement in hazardous areas, also with ATEX and SIL1.
Pressure sensors and transmitters for accurate pressure measurement in hazardous areas under harsh process conditions.
Temperature probes, humidity meters and hygro transmitters that measure precisely in explosive atmospheres.
ATEX signal lamps, alarm units and fire call points in flameproof enclosures for warnings and manual alarms.
Explosion-protected hand lamps, head torches and work lights from certified brands for safe work in all zones.
Every Ex device passes type examination by a notified body and is subject to annual production surveillance. We provide test certificates, declarations of conformity and operating instructions for every product.
Specific certificate numbers and test reports are stored per product and are available as PDF on request.
Our overview poster shows the complete marking system according to ATEX 2014/34/EU. Ideal as a wall reference for planning, purchasing and maintenance.
More than 30 years of experience in measurement and control technology go into every consultation. We take time for your application, deliver fast and support you after the purchase.
Arrange a callbackJoint selection of the right device for your zone, substance and process conditions — in person, by phone or by e-mail.
Modifications and calibrations are carried out within a few working days in our own production.
Orders placed by 4 p.m. ship the same day. Stock items reach you within 24 hours.
We support you with marking, certificates and correct installation according to EN IEC 60079-14.
Three typical fields of use where SEIKOM measurement and control technology ensures safety every day. The examples are representative and show the usual path from requirement to solution.
Continuous monitoring of cooling water flow in a plant with solvent vapours, fail-safe alarm on loss of flow.
NLSW 45-3 Ex flow monitor with evaluation unit and Zener barriers, marking II 2G Ex db eb IIC T6 Gb.
Reliable shutdown in the event of a fault, complete documentation for recurring inspection according to EN IEC 60079-17.
Monitoring filter condition via differential pressure under harsh process conditions in an intrinsically safe circuit.
Ex pressure transmitter in intrinsically safe design, matched to the explosion group and temperature class of the application.
Early detection of filter saturation, simplified recurring inspection thanks to the intrinsically safe concept.
Temperature and flow monitoring in an area with combustible dust, protection to a high equipment protection level.
Devices with protection by enclosure tb, marking II 2D Ex tb IIIC T80 °C Db, matched to the dust.
Safe operation to EPL Db, reproducible process quality and traceable conformity.
Correct interpretation of the ATEX marking is decisive for safe use. Our reference poster explains equipment group, category, type of protection, explosion group and temperature class in context.
Get the poster
Tell us your zone, medium and process conditions. We review your application individually and recommend the right certified device — by phone, e-mail or in a meeting.
Tell us your zone, medium and process conditions. We will prepare an individual quotation for ATEX-certified devices.