Manufacturers of Alarm Annunciators and Systems
Sequential Event Recorders 
Display Facias
Hazardous Area Interface Alarm and Display Products
Signal Conditioning & Trip Amplifiers Process Instrumentation
RTK Instruments Product Range
Alarm Annunciators and Systems
A whole range of alarm products can be supplied including the bestselling Series 725 which is one of the world's most technically advanced Alarm Annunciators. RTK Instruments also offers complete annunciator systems, cost-effective substation Annunciators, and advanced certified Annunciators for hazardous areas.
| Series 725B Combined Annunciator and Event Recorder |
| Our latest, most innovative and advanced Alarm Annunciator is based on our field-proven Series 725 Annunciator with enhanced design features plus event recording and communication options. The 725B offers a complete alarm monitoring system and represents the best investment in protection for your industrial plant. |
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| P725 Annunciator |
| RTK's top selling FULLY programmable alarm annunciator, packed with advanced features in a modern ergonomic design with a no master module design eliminating any single failure sources. All features are fully programmable on a PER channel basis with power applied. |
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| UC625 Programmable Alarm Annunciator |
| The RTK UC625 Alarm System, developed from the field proven P625 range of alarm annunciators, offers the latest in ASIC technology packed into an compact design complete with integral dual redundant power supplies. The UC625 is a fit for purpose replacement for the Ametek Panalarm P930 Annunciator. |
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| System 9000 Annunciator |
| Whether your requirement is a simple stand alone alarm system or a fully integrated high level system with full communications, the System 9000 has the configuration to suit specification and budget. Modular, rack mounted design expandable to thousands of alarm points. |
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| 9000TS Combined Alarm Annunciator and Sequential Event Recorder |
| The 9000TS (SER) leads the way with the latest technically advanced 1mS event capture and optional alarm annunciation and alarm management. |
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| LN1000 Intrinsically Safe Alarm Annunciator |
| For indication of alarms in any zone, the LN1000 provides all alarm and contact information, including first-up information, using only a very small current. A world exclusive, unique unit. |
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| PEX7250 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. |
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| NEX7250 Zone 2 Alarm Annunciator |
| Another unique product manufactured under the new ATEX directive to the European Type "n" standard EN50021:1999 |
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| Replacement Annunciator System |
| An ideal replacement for your obsolete, unreliable alarm annunciators. The Series 725 Annunciator combined with RTK specially designed retro-fit plate, as illustrated, and detailed fitted instructions make upgrading your plant alarms a simple project. |
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| Londex Alarm Annunciators |
| The LONDEX Range of Alarm Annunciators were acquired by RTK Engineering Ltd in 1996 and have been extensively used in all industry types but are very common within Sub Station & Turbine applications due to its historical connection with Ruston Gas Turbines, Cambridge Instruments and Panalarm. |
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| P673 Standby Power Supply |
| The P673 Standby Power Supply is a set of four components designed for use with RTK Engineering's Alarm Annunciators which make up a simple and versatile battery backed power supply. |
Event Recorders, Clocks and Alarm Software
RTK Instruments leads the way with the latest technically advanced Sequence of Events Recorder and combined Alarm Annunciator. The Master Clock option allows global time synchronisation of multiple Sequential Event Recorders. Alarm Management Software is available as a standard package to provide alarm display information in conjunction with RTK Annunciators and Alarm Systems.
| Series 725B Combined Annunciator and Event Recorder |
| Our latest, most innovative and advanced Alarm Annunciator is based on our field-proven Series 725 Annunciator with enhanced design features plus event recording and communication options. The 725B offers a complete alarm monitoring system and represents the best investment in protection for your industrial plant. |
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| System 9000TS Sequence of Events Recorder |
| The 9000TS (SER) leads the way with the latest technically advanced 1mS event capture and optional alarm annunciation and alarm management. |
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| 4850 Master Clock |
| The 4850 Master Clock provides global time synchronisation of multiple System 9000TS Sequence of Events Recorders to a resolution of 1ms to world time standards. |
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| AMS Alarm Management Software |
| The Alarm Management Software has been designed as a ready to use standard package to provide alarm display information in conjunction with RTK Annunciators, Event Recorders and Alarm Systems and is a powerful graphical Human Machine Interface (HMI). |
Lamp Boxes and Display Facias
RTK offer a complete range of backlit alarm displays from conventional filament lamp to super-bright LED’s with optional IP65 versions. Different window sizes are available and all units can have integral pushbuttons and audibles.
| P725 LO Lamp Display |
| The P725 LO Lamp Display uses the same fascia as our No 1 selling P725 alarm annunciator, available in 3 window sizes and a range of sizes to suit the majority of applications. |
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| DF30 |
| The DF30 is available in three different window sizes; any combination of these window sizes can be supplied in any format, mixed as required in a single display to make up the appropriate matrix required. |
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| DFR30IS |
| Based on our field proven DF30, the DFR30IS Intrinsically Safe Display Facia provides a clear display, illuminated by virtually maintenance-free ultra bright LED assemblies and is approved for use in zone 1 and zone 2 hazardous areas. |
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| IP65 |
| The IP65 displays are custom built using backlit LED display windows of two different sizes. Arrays of almost any shape and size can be manufactured to suit the exact display requirements. |
Hazardous Area Alarm and Display Products
This range includes Intrinsically Safe and Explosion proof Alarm Annunciators, as well as Beacons, Sounders, LED Clusters/Pushbuttons and Light Towers for all hazardous area alarm and display applications.
| LN1000 Intrinsically Safe Annunciator |
| For indication of alarms in any zone, the LN1000 provides all alarm and contact information, including first-up information, using only a very small current. A world exclusive, unique unit. |
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| PEX7250 Explosion Proof 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 individua |
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| NEX7250 Zone 2 Alarm Annunciator |
| Another unique product manufactured under the new ATEX directive to the European Type "n" standard EN50021:1999 |
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| DA170 Intrinsically Safe LED Clusters |
| Reliable, high brightness visual indication for hazardous and safe areas, available in six super-bright colours. |
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| DA180 Intrinsically Safe Giant LED Clusters |
| The DA180 provides extremely clear visual indication of process control conditions for both safe and hazardous areas |
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| P861 Intrinsically Safe Illuminated pushbuttons |
| Suitable for all zones, certified to EEx ia IIC T4 to CENELEC standards. |
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| DA135 Intrinsically Safe High intensity Warning Beacon |
| The DA135 LED Beacon provides an ultra-bright LED flash to warn of abnormal events in any hazardous area. |
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| LN870 Intrinsically Safe Light Tower |
| Multi-tier design (up to five tiers) for pole or direct mounting, certified to EEx ib IIC T4 to CENELEC standards. |
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| DB5 Intrinsically Safe Sounder |
| Multitone sounder offering any of 26 tones at 102dB maximum. |
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| DB7 Intrinsically Safe Sounder |
| Multitone sounder offering any of 26 tones at 107dB maximum. |
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| DFR30IS |
| Based on our field proven DF30, the DFR30IS Intrinsically Safe Display Facia provides a clear display, illuminated by virtually maintenance-free ultra bright LED assemblies and is approved for use in zone 1 and zone 2 hazardous areas. |
Hazardous Area Interface Products
A comprehensive selection of Interface devices to provide the critical link between the safe area and the components in the hazardous area. These include Zener Barriers, Isolation Interfaces, Intrinsically Safe Relays and Multiplexers.
| S90 Zener Barriers |
| Building on many years of success with the E80 and E90 range of barriers, the S90 range is now worldwide certified (CENELEC, CSA and SA) and includes models having from one to four channels in the same compact housing, with a variety of ratings giving co |
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| Galvanic Isolators - WIS Range |
| The use of galvanic isolation is ideal in certain applications particularly where adding a high integrity earth is expensive or difficult to achieve. Numerous models are available for analogue and digital inputs and outputs and are all housed in the same |
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| IS Relays |
| IS Relays are immensely valuable to the system designer for both simplification or enhancement of control and indication loops. These products allow interface from safe to hazardous areas, from hazardous to safe and also can be located in the hazardous ar |
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| DA149 Intrinsically Safe Relays |
| For isolated signal transfer between safe and hazardous areas, with galvanically isolated interface requiring no earth. |
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| Multiplexers |
| The origin of these Intrinsically Safe Multiplexers goes back to the pioneering products of the early eighties. Having been steadily improved over the years, these are still a highly cost-effective method of saving both cable and barrier costs. |
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| E90 Zener Barriers |
| RTK Enginering is maintaining full support for existing E90 customers including the provision of spares and repairs. For new installations see the S90 Zener Barriers that now carry worldwide certification (CENELEC, CSA and SA) and include models that have |
Signal Conditioners and Trip Amplifiers
Efficient, cost-effective process electronics modules with a proven pedigree. These can convert and isolate the incoming signal and provide analogue and/or trip relay outputs.
| P766 Signal Isolator |
| 3-port isolation, mains or DC powered and only 22mm wide. |
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| P666/P665 Signal Isolator/Signal Converter |
| Total isolation or low cost conversion. |
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| P866 Signal Bisolator/Trisolator |
| Dual and triple isolated outputs from a single input. |
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| P659 Isolated Frequency Converter |
| Reliable conversion for sine, square or triangular signals. |
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| P607 Trip Amplifiers and Converters |
| Versatile designs for all standard process signals. |
Process Instrumentation
RTK Instruments manufactures a widely-used range of Meters and Timers, as well as Power Supplies, DC/DC Converters and Standby PSU Systems.
| PPM4-P Process Meter |
| User-scalable meter for all process inputs. |
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| PPM4-T Temperature Meter |
| Fully linearised, high accuracy panel meter. |
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| Tracker 220 Universal Input Meters |
| Compact units with universal signal and power inputs. |
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| P610 Process Timer |
| Accurate measurement of actual times in conveyor-fed systems. |
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| RT Series AC and DC Converters |
| Economical universal Power Supplies for conversion from a range AC and DC voltages. |
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| P673 Standby Power Supply |
| The P673 Standby Power Supply is a set of four components designed for use with RTK Engineering's Alarm Annunciators which make up a simple and versatile battery backed power supply |
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