It has three main portions. The top portion is fitted with a thistle funnel and
a bulb structure through which dilute acid can be poured which reacts
with a metal sulphide in the base of the Apparatus. H S gas then evolved 2
collects in the middle dome from where it can be released through a
leakproof stopcock fitted with a self lubricating PTFE plug. The base is
provided with a residual outlet fitted with a cap for easy cleaning.
Material : High Density Polyethylene
