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Manufactured in the U.K., the QWS4 combines performance and reliability with exceptional value for money. This new water still incorporates a number of operational and safety features that make this still the ideal choice for your laboratory. • Output capacity 4Litres/Hour pyrogen free* single distilled water • Distillate quality complies with European Pharmacopoeia for Purified Water & A.S.T.M. Type 4. • Pyrex® glass boiler and condenser minimise potential contamination of distillate from the leaching effect of distilled water on metal components • Distillate pH5.0-6.5 • Distillate conductivity 3.0-5.0uS/cm • 3kW chromium plated heating element with 2 independent re-settable thermostats protect the still in the event of water supply failure • Easy to clean. No glassware dismantling is required • Available in 230V, 220V and 120V versions. Output capacity of 120V model is around 2.4Litres/Hour • Can wall or bench mounted • CE marked by independent testing agency • Supplied with an instruction/operating manual • All of the major components are available as spare parts *We recommend that the distillate is tested before use
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ESCO Airstream vertical laminar Flow Clean Benches LVG offer proven protection for your samples and processes where operator protection is not required. Vertical laminar flow offers certain tangible advantages over horizontal flow clean benches (which may be conventional in some parts of the world), such as lower energy consumption (40% of conventional systems) levels through the use of exclusive motorized impeller technology and less airflow turbulence (especially when large objects are used in the work zone). In fact, the negative pressure filter mounting system employed on these models is widely recognized to be superior to that of conventional horizontal flow clean benches.
ISO Class 3 air cleanliness within work zone as per ISO 14644.1 (Equivalent to Class 10 as per US Federal Standard 209E, 10 times “cleaner” than the usual Class 100 classification on clean benches offered by the competition).
High-quality polyester pre-filter and main ULPA filter with a typical efficiency of 99.9997% at MPPS and 99.9998% at both 0.3 and 0.12 microns provide the best product protection in the world; typical main ULPA filter lifespan is more than 3 years depending on the usage of the clean bench.
Mini-pleat separator-less ULPA filter technology reduces energy consumption and delivers increased laminar airflow uniformity for better product and cross contamination protection.
Integral filter metal guard on both sides prevents accidental damage to ULPA filter; seamless filter gasket is permanently melded on the filter frame and will not deteriorate over time; aerosol (DOP/PAO) challenge test port included.
Head
Trinocular, 30° inclined, 360°rotating
Eyepiece
WF 10x/20
Nosepiece
Quintuple, reversed
Objectives
IOS N-PLAN 4x, 10x, 20x, 40x, 100x (oil/water)
Stage
Double layer, 233×147 mm, moving range 78×54 mm, X-axis rackless
Focusing
Coaxial coarse and fine, limit stop
Condenser
Abbe N.A. 1.25, iris diaphragm, focusable and centrable
Illuminator
Transmitted: 3.6 W X-LED³, manual brightness control
Incident: High-power blue LED
Gentian violet slightly stains the nuclei of the leucocytes. The blood specimen is diluted 1:20 in a WBC pipette with the diluting fluid and the cells are counted under low power of the microscope by using a counting chamber. The number of cells in undiluted blood is reported per cumm (µl) of whole blood.
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