This apparatus gives a memorable and dramatic demonstration of the ionising
properties of alpha particles. Alpha particles have short range but are very
effective at ionising air. In this apparatus a number of fine wires are
supported above a metal plate to form two electrodes separated by a small air
gap. 4mm terminals allow an EHT supply to be connected and when the potential
across the gap reaches about 4500V occasional ionised particles cause a
visible and audible spark to occur. If an alpha source is brought near, the
sparking dramatically increases showing the presence of ionised particles. The
short range and poor penetrating properties of alpha radiation can be easily
demonstrated. An EHT power supply capable of providing a negative potential is
required, (XPU 080 010) is recommended.
Free on orders greater than £100
Free on orders greater than £250
Spark detector (Each)
Item #: XAR260010£152.39
Spark detector (Each)
UK mainland (excluding Northern Ireland, Scottish Highlands, Channel Islands and the Isle of Wight) :
Orders less than £100.00 are subject to a £7.50 carriage and packing charge.
Free delivery is available on all standard stock orders over £100.00 (exclusive of VAT, Hazardous Chemical Delivery Surcharge)
Northern Island, Isle of Man, Scottish Highlands, Channel Islands and Scilly Isles:
Orders less than £250.00 are subject to a £12.00 carriage and packing charge.
Free delivery is available on all standard stock orders over £250.00 (exclusive of VAT, Hazardous Chemical Delivery Surcharge)
International :
We ship to most countries and carriage is quoted as extra. Please contact our international team for further information.
