Detonator systems
Detonators
A detonator constitutes of a small metal shell, which contains explosives e.g. lead azid, PETN or a combination of explosives. Detonators are used to initiate explosives for example in mines, in connection with constructions and in quarries and exist of several different kinds and both with and without delay.
Plain detonators
A plain detonator constitutes of an aluminium- or copper cylinder, which is closed at one end. The detonator has a powerful explosive at the bottom (secondary charge) and on top of that a primary charge. The primary charge is initiated by safety fuse. Thereafter the primary charge initiates the secondary charge. The detonator has no delay
Non-electric detonators
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A non-electric detonator is a detonator, which is initiated by a signal conductor (a signal conductor or shock tube is coated with a reactive material on the inside), or a detonating cord of low energy type. The detonator can be manufactured both with and without delay.
Initiation systems with low energy signal conductor comprise detonators with a signal conductor with a nominal charge volume less than 0.2 g/m, which will not initiate a standard explosive via side detonation.
In some detonators the primary charge has been replaced by another composition to get a detonator less sensitive to mechanical impact.
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Electric detonators
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An electric detonator is a detonator, which is initiated by a current passing through a bridge wire (with a certain resistance), which is surrounded by a pyrotechnic charge (fuse head). The detonator can be manufactured both with and without delay.
The electric detonators are divided in different groups depending on the electrical properties, i.e. what current and impulse is needed to ignite them.
In some detonators the primary charge has been replaced by another composition to get a detonator less sensitive to mechanical impact.
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Electronic initiation systems
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An electronic detonator is a detonator in which the delay time is electronically controlled. An electronic initiation system is an initiation system comprising blasting machine, measuring equipment, wire system and electronic detonators.
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Blasting machines
A blasting machine is a product intended to supply the energy or the impulse needed for initiation of detonators. Blasting machines can be manufactured for initiation of non electric detonators, electric detonators and electronic detonators.
Measuring apparatus
Measuring apparatus can be intended for control of unbroken initiation circuit, for measuring of the resistance in the initiation circuit or for measuring of the resistance of an initiation circuit to ground.
Shotfiring cables
Shotfiring cables are two-wired and used for connection of cables between the blasting machine and round.
Connecting wires
Connecting wires are used for connection or round and are intended for one-off use.
