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Hochiki Intrinsically Safe Products

 

What is Intrinsic Safety?

For an electrical product to be ‘Intrinsically Safe’ it must be incapable of igniting an explosive atmosphere by either spark or heat.  This is achieved by ensuring only low currents and voltages enter the hazardous area, and therefore the whole circuit must be considered, not just the device in isolation.

An ‘Intrinsically Safe Circuit’ therefore must restrict the electrical and thermal energy such that ignition of a hazardous atmosphere (explosive gas or dust) cannot occur.

 

Our Intrinsically Safe & Explosion-Proof Range

Hochiki’s Intrinsically Safe and Explosion Proof range of products has been designed and produced to ensure that all the great benefits of Hochiki’s high quality fire detection technology can be safely operated within industrial and hazardous environments.

Hochiki’s Intrinsically Safe detectors and hazardous area products have been certified by BASEEFA to IECEx and ATEX.

 

High quality products for protection of hazardous areas

 

Applications

These products have been specially designed for the following applications and
environments:

 

 Applications include oil refineries, petrol, coal mining, gas processing, chemical engineering

 

     
 

SLR-E-IS
I.S. Conventional Smoke Detector

Model SLR-E-IS is a Photoelectric Smoke Detector designed for use in hazardous areas which also incorporates a remote indicator output and a removable chamber for easy maintenance.

The unit incorporates Hochiki’s unique High Performance Chamber Technology which enables the detector threshold level to be increased, thereby improving the signal to noise ratio and reducing susceptibility to false alarms.

SLR-E-IS - conventional is smoke detector
 

DCD-1E-IS
I.S. Conventional Heat Detector

The DCD-1E-IS is an Intrinsically Safe Conventional Rate of Rise Heat Detector with a 60 degree fixed temperature element designed for use in hazardous areas. 

The unit also features a remote indicator output.

DCD-1E-IS Conventional IS Heat Detector
 

YBN-R/4(IS)
I.S. Conventional Mounting Base

Model YBN-R/4(IS) is a Conventional Detector Mounting Base associated with the CDX Range of Intrinsically Safe Detectors and is fully compatible with the majority of existing conventional fire alarm control panels.

It is supplied with square cable clamps for secure and reliable cable termination.

YBN-R/4(IS) Conventional IS Mounting Base
 

CCP-E-IS
I.S. Conventional Manual Call Point

The CCP-E-IS is a conventional manual call point based upon the industry standard KAC world series housing, which can be used in hazardous areas.

It can support either a frangible glass element or a non-frangible plastic element for activation and features a rugged design with terminals able to accept 2.5mm2 conductors.

CCP-E-IS - Conventional IS Manual Call Point
 

IFD-E(IS)
I.S. Conventional Infra-Red Flame Detector

Model IFD-E(IS) is an Intrinsically Safe IR3 flame detector designed for use where open flaming fires may be expected and responds to the light emitted from flames during combustion.  The detector discriminates between flames and other light sources by responding only to particular optical wavelengths and flame flicker frequencies, enabling the detector to avoid false alarms.

IFD-E(IS) - Conventional IS Flame Detector
 

IFD-E(Exd)
Conventional Explosion-Proof Infra-Red
Flame Detector

Model IFD-E(Exd) is an Explosion-Proof IR3 flame detector designed for use where open flaming fires may be expected and responds to the light emitted from flames during combustion.  Housed in an explosion-proof case, the detector discriminates between flames and other light sources by responding only to particular optical wavelengths and flame flicker frequencies, helping to avoid false alarms.

IFD-E(Exd) - Conventional Explosion-Proof Flame Detector
 

BARRIERS
I.S. Zener & Galvanic Barriers

Our barriers are zone-powered and are used in conventional fire detection systems for protection within hazardous areas.

Each Zone contains two stages of pulse-tested Zener or forward- connected diodes and an 'infallible' terminating resistor.  In the event of an electrical fault in the safe area, the diodes limit the voltage that can reach the hazardous area and the resistor limits the current. 

Hochiki Zener Barriers

 

Intrinsically Safe Compatible Products

Buildings do not tend to be completely
hazardous; they will have safe areas that require standard devices and hazardous areas that require  intrinsically safe devices. 

Therefore, an intrinsically safe compatible module is designed to interface between the two. Some modules also provide line monitoring for open or short circuits on the wiring connected to both the safe and hazardous areas.

 

It is important to note that a module does not reduce the current in any way, a module is simply used to interface between standard devices and intrinsically safe devices. 

This means that you must also use an intrinsically safe barrier; it is the barrier that reduces the power that enters the hazardous area. Both the module and the barrier must therefore be installed in the safe area.

 

 

CHQ-DZM(SCI)-IS
I.S. Compatible Dual Zone Module

Model CHQ-DZM(SCI)-IS is Dual Zone Module which is also available as a DIN Rail mountable module; both variants feature an integral short-circuit isolator.  Addressing is achieved via simple DIL switches.  The device is designed to allow up to 40 (20 per zone) Conventional I.S. CDX Range detectors (SLR-E-IS or DCD-1E-IS) in the hazardous area to be interfaced to Hochiki’s ESP analogue addressable system within the safe area.

CHQ-DZM(SCI)-IS - IS Compatible Dual Zone Module with integrated SCI
 

CHQ-ISM
I.S. Compatible Sounder Control Module

This Sounder Control Module interfaces between the Hochiki Analogue system via a CHQ-DSC(SCI) or conventional sounder O/Ps and the intrinsically safe sounder/beacon units via an intrinsically safe barrier.

The module provides line monitoring for open or short circuits on the wiring connected to both the safe and hazardous areas.

CHQ-ISM - IS Compatible Sounder Module

Learn More About Intrinsic Safety with our White Paper

IS White Paper

For almost 100 years Hochiki has led the way in the design and manufacture of innovative life safety solutions. Its leading edge commercial and industrial fire detection and emergency lighting products have acquired global acceptance as the benchmark for high-integrity and long-term reliability.

With a global sales turnover exceeding £400m Hochiki is a wholly independent, multinational, publicly listed company with over 1,500 employees working across five manufacturing plants, 32 sales offices and 18 subsidiaries.

Its ongoing commitment to manufacturing innovation ensures customer satisfaction and its production facilities in Japan, the USA and Europe offer international continuity in quality, service and supply.

           
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