Exel™ Develdet™ Detonators consist of a length of abrasion resistant pink Exel™ signal tube with a delay detonator crimped to each end. The initiation signal is transmitted to the detonators via the signal tube. A high strength PETN base charge and a 5 second delay element are combined in the in-hole detonator. The surface detonator comprises a low strength base charge and a 200ms delay element.
A fluorescent yellow connector block fully encloses the surface delay detonator. The design of this connector block guarantees security of signal tube retention and can initiate up to six signal tubes.