MEASURING INSTRUMENTS
Paul N. Gardner Co., Inc. • www.gardco.com • (954) 946-9454 • 1-800-762-2478
Microgram (µg) Measurements Made Simpler.
The BM-20 and BM-22 microbalances have the performance and standard accessories to simplify
microgram measurements. The Ion Series now makes microgram (µg) measurements accessible to
all researchers and offers a real choice in microbalances.
Ion Model Capacity Resolution
BM-20 22 g 0.001 mg (1 µg)
BM-22 (Smart Range) 5.1 g 0.001 mg (1 µg)
22 g 0.01 mg (10 µg)
BM-252 250 g 0.01 mg (10 µg)
BM-200 220 g 0.1 mg
BM-300 320 g 0.1 mg
BM-500 520 g 0.1 mg
Eliminate One of the Major Frustrations in Precision Weighing
THE CHALLENGE
Static, while often overlooked, can seriously degrade precision weighing. An electrostatically charged
object induces the opposite charge in nearby objects. The resulting attraction causes inaccuracies as
shown below.
Error when a charged object
approaches
The apparent value will shift in
the negative direction. Static
attraction from a charged object,
like clothing (frequent in dry win-
ters) can cause values to drift.
Error when weighing a charged
object
The object will appear heavier.
The value then changes as static
electricity is dissipated into the
air or via the weighing pan.
Filter papers, disposable weigh boats
and plastic centrifuge containers can
all become charged just from normal
handling. And charged powders can
be displaced, causing cross-contami-
nation.
THE SOLUTION
Better, Safer Measurements.
Understanding and removing static elec-
tricity is critical to accurate weighing.
The built-in ionizer improves weighing
by eliminating static. And because the
direct current (DC) method is used, the
ionizer needs no fan. So, you can neutralize static in fine powders without the risk of compromising
your sample.
Static control is so important the built-in ionizer is standard in all Ion Series balances. Simply hold the
sample in the upper neutralizing chamber for a few seconds before weighing.
Interlocking Doors
Use this feature to open either door from the
opposite side, or open both doors with one
hand. You work more quickly and efficient-
ly when you can use both hands.
2
(62 pages)
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