sirens beLLs Hooters eLectronic sounders FLameProoF deVices marine sounders and beacons
intrinsicaLLY saFe sounders and beacons Voice sounders combination units airHorns
Safety is a sound investment.
Product grouP Listing 3
seLection and aPPLication 4-6
a guide to seLecting and Positioning wide area sirens 7
ingress Protection tabLe (iP) 8
uL exPLosion ProoF 10
aPParatus cHart 11
decibeL Versus distance cHart 12
ProDUCt groUP LIstIng:
motorised sirens 21-24
Long range sirens 25-33
Hand oPerated sirens 34-37
air and HYdrauLic sirens 38-39
FLameProoF deVices (bansHee) 48-61
bansHee combination units 62-64
eLectronic sounders 65-67
beacons (bansHee) 68-71
emergencY FLare 72-73
is PortabLe beacon 74
otHer Products (Hand Held Horns & Megaphones) 75-76
son F1 range 77
a range sounders and combination units 78-82
exPLosion ProoF deVices (e2s) 83-91
is range 92-99
beacons (e2s) 100-101
marine range 102-106
son 4 range 107-108
gPH Horns 111-112
beacons (sPectra) 117-141
PaneL mount Products (Indicator lamps and buzzers) 142-146
traFFic LigHts, sPectra 147-151
sounders and combination units, sPectra 152-156
turbo bLowers 157-158
seLeCtIon AnD APPLICAtIon
Listed below are some important product information and categories which will be required when making a selection of the type of signalling unit that will best suit your application. There is a wide range of sirens, electronic sounders, hooters, flameproof units and beacons available to choose from. Kama Industries offers on site service in assisting you with your selection of a signalling unit. Please contact your supplier to arrange this.
PLEASE NOTE: Utmost care was taken in the preparation of this catalogue to insure all the information is correct. Kama Industries and any of its distributors do not accept any liabilities for any consequences resulting in the use of the information contained in these documents. If in doubt, please contact your supplier.
Selecting a signalling device for a particular application is usually determined by various factors: The type of electricity supply available
Ambient noise in the environment
The duration of signal required
The quality and type of audible or visual signal required to attract attention
Environmental conditions (indoor, outdoor, explosive atmosphere)
Environmental FactorsThe intensity and type of sounder or beacon chosen for the area in which they will be used, will be dependant on the application i.e. sounders for certain applications in the Food Industry may not be suitable for similar applications in an industrial area. A sounder used in a Manufacturing Company (Heavy Industrial) may not be suitable for a similar application at a School. Industrial, Mining and Manufacturing Included in this category is not only factory premises but also equipment and facilities used in factories, such as cranes, mechanical handling vehicles, diesel generating sets and control panels. Also included in this category, are industrial hazardous locations such as coal mines and the petro chemical industry.
Building: Commercial and PublicHospitals, Schools, Offices, Building sites, Houses, Military sites and Airports can be classified under this category. Due to continuous product research and developement some products may vary from the specifications in this catalogue.
Priority and Public Service Vehicles Police vehicles, Fire departments and Ambulances
Marine Dock and Ship installations, including any other hazardous sites (oil terminals etc.)
seLeCtIon AnD APPLICAtIon
FrequencyThe frequency is the identication of note and is usually defined by the number of vibrations per second. To measure frequency one should use a frequency meter. In cases where the electrical contractor does not have such a meter, it is usually sufficient for the ambient noise frequency in an environment for our purposes to be identified. For example, the noise in a machine shop in which a grinder is being operated would be of a high frequency, while that of forge with a drop hammer would be of a low frequency.
Time ratingAccount must be taken of the time cycle over which the alarm is required to operate and a signal has to be selected which has an adequate time rate. It should be noted that sounders used as evacuation alarms are required to be continuously rated. Sirens for example, are products available on the market which have time ratings of either one minute or more, but these products are not accepted by the Fire Authorities. The contractor should keep this in mind when modifying or inspecting existing installations.
Noise Level requiredHaving established the ambient or background noise and frequency level, the sound pressure level needs to be defined in order for the sound to be heard over the distance that the sound is required to travel. Tests show that the ear can distinguish a warning signal which is ten decibels below that of the ambient noise level, provided that there is an adequate frequency differential.
Noise AttenuationIn selecting the correct sound pressure level required to cover an application, it is necessary to appreciate that as a rule of thumb sound is absorbed and reduces at the rate of 6 decibels as the distance from the signal is doubled. This factor is known as attenuation. Where the operating conditions are difficult, for example where there is a likelihood of high winds or where there are solid objects in the noise path, attenuation of 8 to 10 decibels should be allowed for to avoid blind spots or inadequate coverage. Before finally choosing the signal to be used, ensure that the same or similar sound is not used in an adjacent system for other applications. Should the sounder be installed outdoors and be subjected to exterior elements, then a weather proof version must be selected. It should be remembered that there are also in-door situations that require weatherproof enclosures. Explosion or flameproof signal devices are essential if the sounder is required to be sited in a location where there are explosive or fire hazard conditions.
Sounders AvailableThere are many basic types of signalling devices available but in this selection we are covering:
Buzzers and Hooters
seLeCtIon AnD APPLICAtIon
SirensSirens are low frequency devices usually continuous rated and are electric motor driven. Air is pulled in through a multi bladed impeller and pushed out through radial vents. The combination of motor speed and the number of impeller blades, with the number and spacing of the radial outlets determine the frequency. The siren is used extensively for disaster warning but also has many other applications. These include, uses as fire alarms, anti-theft/security alarms, process control, time signalling, fault indication and machinery stop-start alarms. Most individual requirements are covered by sirens rated from 100 W to 7.5 KW, which have sound outputs from 95 dB to 145 dB at 1 metre distances and giving an audible signal over a range of 100 to 15000 metres.
Buzzers and Hooters These are electro-mechanical devices where the diaphragm is deflected by an electro magnet. In general, hooters are low cost and robust. Their applications include fire and security alarms in Industrial and Marine applications, truck horns, process control, time signalling, telephone signalling, boat horns and public vehicle attack alarms. Buzzers can be used with projectors to give more directional sound and are used as general industrial alarms, crane warning alarms, control panel warning alarms, industrial truck alarms and boat alarms.
Electronic SoundersThe electronic sounder is by far the most versatile device available and has many distinct advantages as far as the design engineer and contractor is concerned. Not least of these is the low current consumption and relatively high sound output, which make the electronic sounder ideal for use in conjunction with battery powered systems. Consequently, this type of sounder is also used extensively for fire and security alarm systems, as well as industrial mining, process control, marine and hazardous area applications.
BeaconsThe beacons can assist by adding additional visual attraction by means of a flashing, static or rotating format. These units are normally available in RED, AMBER, GREEN and BLUE, but other colours are available on request. The LED beacon can be set to flash at up to 120 flashes per minute or remain static.The Xenon flasher is avaliable in all the colours and the LED flasher usually only in RED or AMBER, other colours available on request. When beacons are used in conjunction with sirens or sounders, the unit can be connected to set the siren and beacon off simultaneously or with the siren sounding for a short period and the beacon flashing until the condition for alert has been rectified.
BellsThese are motor driven or coil driven devices mainly used for School alarms, Fire and Security alarms and time signalling. These units have high frequencies and low current consumption. Of particular interest to the contractor is that models have been designed to make installation very simple.
When selecting a siren, a careful study of the specific project is required. Although Kama Industries will always be