Aquameter
™
Series Instruction Manual
10401-00188 Rev M
23. Appendix 2. Flow Through Cell
23.1. Introduction
The Aquaread Flow Through Cell (Flowcell) is designed for use with any model of
Aquaread Aquaprobe and most third party pumping device.
The Flowcell allows sample water to flow up through the Aquaprobe, passing over all the
individual electrodes simultaneously. This eliminates air contact with pumped samples from
groundwater boreholes allowing truly representative measurements to be obtained.
Made from marine grade aluminium and 6mm wall thickness acrylic, the Flowcell is
ruggedly constructed for hard use in the field. The base flange includes four holes to allow
the unit to be pegged down if necessary.
23.2. Spigot Installation
The Aquaread Flowcell is supplied with two pairs of spigots, one pair to fit 6mm (1/4”) ID
tube and one pair to fit 10mm (3/8”) ID tube.
The spigots have a tapered thread so should be screwed into the inlet and outlet holes of
the Flowcell until they are tight. At this point, they should seal due to the taper. If a spigot
will not seal properly, remove it then re-insert with some PTFE plumber’s tape wrapped
around the thread.
23.3. Aquaprobe Preparation Prior to First Use
If you are using an early Aquaprobe with a single
part Sleeve, the Sleeve should be removed and a
good layer of silicon grease or a few turns of
PTFE tape should be applied to the mating
surfaces where the Probe Sleeve slides onto the
Probe Body. This will prevent sample water being
forced up between the Sleeve and body when the
Flowcell is under pressure. When the grease or
tape has been applied, refit the Sleeve then
recalibrate.
If your Aquaprobe has a two-part Sleeve, there is
no need to apply grease or tape as the upper
Sleeve is fitted with an O-ring seal.
23.4. Aquaprobe Installation
The lower Sleeve must be fitted to the Aquaprobe,
but
the protective Sleeve End Cap must not be
fitted
as this will reduce flow and cause
turbulence.
Loosen the screw collar located at the top of the
Flowcell and slide the Aquaprobe in all the way,
ensuring it is properly seated in the recess where
the clear tube enters the base. Tighten the collar
to clamp the Aquaprobe in place.
© 2011 Aquaread Ltd.
www.aquaread.co.uk
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