UNIDATA
Unidata Manual 6293 - Precision Water Level Instruments Issue 2.1
36
Model 6541F-90 (Previously 6509F)
This float is suitable for sites with a small water level range or where a
lightweight floatline is used. The float is designed for use in a floatwell with a
minimum diameter of 125mm, or 100mm if a separate counterweight tube is
used. The float has an ovoid shape and is weighted to float on the centreline.
Dimensions: Ovoid float 88mm diameter, 130mm
long.
Maximum diameter is 92mm at the
join.
Materials: Moulded black thermoplastic.
Stainless steel fitting for float line.
Weighted to float at the centreline
when installed with a 160g
counterweight.
Weight: 430g.
Model 6541F-50 (Previously part of 6509C)
This float is a long cylinder intended for use in small bores and float wells.
Smaller diameter versions of this float can be supplied at special request. Careful
site design and installation is required to avoid significant float system errors
when small diameter floats are used. Small floats should only be used with
lightweight float line and systems designed for minimum float line friction and
weight transfer.
Dimensions: Cylinder 50mm diameter and 135mm
long.
Maximum diameter is 60mm at end
caps.
Materials: PVC Pipe and fittings. Stainless Steel
suspension fitting for float line.
Weighted to float upright and at a
suitable depth when fitted with a 160g
counterweight.
Weight: 250g.