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Hazardous Area Notification

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LN1000 - Intrinsically Safe Annunciator

LN1000 Intrinsically Safe Annunciator provides a unique solution for problems with hazardous area alarm indication. The annunciator provides a visual display of the alarm status including 'first-up' information and can be mounted in the hazardous area for the benefit of operators working in any Zone.


The lightweight stainless steel construction gives a compact and simple to install modular unit which can easily be expanded by the addition of extra alarm cards.


Maintenance can be carried out live without the necessity of 'gas checks' or prior shutdown. Unlike flameproof, purged and type 'N' systems, installation is simple and relatively low cost.


Power to the annunciator is supplied from the safe area through a single Intrinsically Safe interface for up to 32 channels.


With the addition of a number of ancillary devices a complete intrinsically safe alarm and control package can be provided.

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PEX 7250 - Explosion Proof Alarm Annunciator

The PEX7250 Explosion Proof Alarm Annunciator offers a vast range of features and benefits normally reserved for use in safe area annunciators only. The heart of the system is our field proven Series 725 Alarm Annunciator which is available in 3 individual window sizes 30mm x 30mm, 30mm x 60mm or 60mm x 60mm. Reliability of the system is vastly improved over conventional systems with the use of ASIC's (Application Specific Integrated Circuits) for each pair of alarms, removing any reliance on common control cards. The standard enclosure is copper free cast alloy, finished in a light grey two-part epoxy paint, making it ideal for offshore applications. 

Systems are available in a range of formats and sizes and are certified for use in Zone 1 hazardous areas. All systems are automatically covered by our standard 5 Year Warranty.

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DB5 Intrinsically Safe Sounder

The DB5 Intrinsically Safe Sounder is ideally suited for use in areas of high ambient noise, with a sound output greater than 100dBA. ATEX certified to Ex II 1G EX ia IIC T4 , the DB5 offers 26 tones, user selectable using a 5-way DIL switch. A second tone can be obtained by switching the negative supply to a third terminal. For extreme noise levels, the Sounder can be linked to the RTK DA135 Intrinsically Safe Beacon to combine audible and visual warnings. The IP65 enclosure makes the DB5 Sounder ideal for the harsh environmental conditions found offshore as well as those of the onshore oil, gas and chemical industries.

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DA170 Intrinsically Safe LED Clusters

The DA170 range of LED Clusters provides visual on/off indication of process conditions in safe and hazardous areas. Available in six super-bright colours - red, green, amber, orange, blue and white - they are standard 22.5mm diameter and seal to IP65 to the panel door.

The DA170 Intrinsically Safe LED Clusters are ATEX Certified to Ex II 1G, EEx ia IIC T4 and are suitable for zones 0, 1 and 2 and for all gas groups.

All six colours are fully current limited and take only 20mA. All are matched for equal brightness including the white and blue versions.

In hazardous areas it is possible to combine LEDs from a single Intrinsically Safe interface, two for IIC interfaces and four with a IIB interface.

The standard LED Cluster can also be supplied fully mounted in stainless steel boxes ready for immediate mounting on-site.

With the LED’s lower power consumption, lower heat dissipation and long life expectancy the DA170 is an ideal standard indicator for safe and hazardous areas alike.

In addition to the standard LED Clusters, RTK can provide a complete matching range of pushbuttons, selector switches and emergency-stop buttons. Most of the pushbuttons and selector switches can be supplied in either illuminated or non-illuminated versions, thus giving your intrinsically safe control panel a consistent appearance.

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DA180 Series Intrinsically Safe Giant LED Clusters

The DA180, having a 66mm diameter lens, provides extremely clear visual indication of process control conditions from a distance and from the side. Lenses are available in six super-bright colours and feature an integral current regulator to limit the current to 20mA. This ensures that all colours are matched to obtain consistent brightness across the range. Up to two LED Clusters can be driven from a single 11C power source. The lamps are designed to provide a minimum of 100,000 hours of service life.

The DA180 Giant LED Clusters are ATEX Certified to EX11 2G, EEx ia IIC T4 and are suitable for zones 1 and 2. When used in hazardous areas, the LED Clusters must be powered through suitable intrinsically safe Isolators or Barriers.

The LED Clusters can be supplied as loose parts or pre-mounted in a stainless steel or polycarbonate IP65 rated box ready for immediate installation on site.

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P861 - Intrinsically Safe LED Lamp

The P861 LED Lamp provides visual on/off indication of process conditions in both safe and hazardous areas. Available in a choice of six super-bright colours (red, orange, yellow, green, blue and white), they are ideally suited as part of a panel mounting indicator or illuminated pushbutton assembly.

The P861 itself is a standard BA9s intrinsically safe LED lamp which can be supplied as part of a pilot light or illuminated pushbutton or alternatively supplied separately to be used in any standard switch or lamp assembly.

With the LED lamp being current limited to take a maximum of only 20 mA, it is possible to drive two lamps from a single IIC interface without any affect on the brightness.

With the LED's low power consumption, low heat dissipation and long life expectancy, the P861 is an ideal indicator for safe and hazardous areas alike.

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DFR30IS Intrinsically Safe Display Facia

The DFR30IS Intrinsically Safe Display Facia is a backlit LED illuminated display approved for use in zone 1 and zone 2 hazardous areas and has been ATEX certified to EN50014:1997 and EN50020:2002, Group II, Category 2G, EEx ia IIC T4. This product is often combined with RTK Instruments’ range of Alarm Annunciators and certified Interfaces to provide a complete Alarm Management System with displays in both safe and hazardous areas.

Three window sizes are available (30 x 30mm, 60 x 30mm and 60 x 60mm) in a choice of six colours. As the DFR30IS Display Facia is modular in design, displays can be created in almost any format, arrangement and size enabling the user to have exactly the configuration needed for a specific application. The unit can be supplied complete with film legends to a customer’s requirement or RTK can supply a template to allow users to create their own legends locally.

As the DFR30IS is often used for alarm indication, pushbuttons can be included within the display itself to acknowledge and reset alarms. These are normally fitted in the bottom right-hand cell. 

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