1
General Information
The Hach TenSette™ Pipet is a precision device for dispensing small quantities
of liquids. Rugged construction and precision manufacturing ensure prolonged
use and dependability with a minimum of service. Ten separate volumes (from
0.10 to 1.00 mL in 0.10-mL increments) can be selected simply by dialing the
desired setting. Reproducibility is within two percent for the 0.10, 0.20 and
0.30-mL settings. All other settings will deliver within one percent or better.
Nonwettable polyethylene pipet tips ensure quantitative transfer of aqueous
solutions.
The TenSette Pipet is factory-set to dispense sample volumes of 0.10, 0.20, 0.30,
0.40, 0.50, 0.60, 0.70, 0.80, 0.90, and 1.00 mL at an altitude of 1000 feet (305
meters) above sea level. Sample volumes will accommodate any standard
additions procedure and are well-suited for any procedure requiring precision
dispensing of small amounts of solutions.
For best results, always use a new tip for each pipetting operation. After being
used several times, the pipet tip may retain some liquid, causing an error in
delivery, Each pipet is supplied with 100 tips. Order Hach replacements, Cat.
No. 21856-96 for best results.
Always use careful and even hand movements for best reproducibility. If the
pipet does not operate smoothly, disassemble and coat the piston and retainer
with high-quality stopcock grease. The metering turret also may be lightly
coated with grease.
Sometimes the column of solution may rise in the tip while moving the pipet
between the source and the receiving vessel. This is normal and will not affect
the volume delivered as long as the proper pipetting technique is used.
For best accuracy, both the room temperature and the solution being pipetted
should be between 20 and 25ºC. Avoid palming the pipet an unnecessarily long
time prior to use because the aliquot volume could be affected by elevated
temperatures.
Never lay the pipet down with solution in the tip. Solution could leak into the
pipet and cause corrosion.
