Precision Scientific / Napco (Thermo Scientific Inc.)

Photo of Single Thick Cellulose Extraction Thimbles. Whatman
Cellulose extraction thimbles are produced from high quality alpha cellulose cotton linter and have excellent mechanical strength and retention. Standard single thickness thimbles have a wall thickness of approximately 1 mm (10 µm nominal particle retention). These thimbles are used in Soxhlet extraction units providing a safe, convenient and efficient method of solvent extraction of solids and semi-solids. Soxhlet extraction is a widely used technique for the analysis of fats or pesticides in foods and soil materials and many other procedures that involve a solid-liquid extraction.
Photo of Double Thick Cellulose Extraction Thimbles. Whatman
Cellulose extraction thimbles are produced from high quality alpha cellulose cotton linter and have excellent mechanical strength and retention. Double thickness thimbles have a wall thickness of approximately 2 mm (6µm nominal particle retention) for applications where higher retention and increased wet or dry strength or rigidity is required. These thimbles are used in Soxhlet extraction units providing a safe, convenient and efficient method of solvent extraction of solids and semi-solids.
Photo of Glass Microfiber Extraction Thimbles. Whatman
High purity glass microfiber thimbles manufactured from 100% pure borosilicate glass are available for specialized applications. The thimbles are completely free of binders or additives and can be used at temperatures up to 500° C or when using solvents incompatible with cellulose thimbles. These thimbles are also used in pollution monitoring techniques (0.8 µm nominal particle retention). Typical thickness 1.7 mm. Applications include: smoke stack gas monitoring, Soxhlet extraction, analyzing pesticide residues, determining oil/fat content of foods, analysis of oil and grease in solid wastes.
Photo of Precision B+ Vacuum Pump Oil
Precision B+ Vacuum Pump Oil is highly purified premium grade oil that has been specifically formulated for vacuum pump applications. (Sample Photo Shown. Individual models may differ from the image shown.)
Photo of High-Performance Mechanical Convection Incubator
Thermo Scientific Precision High-Performance Incubators with mechanical convection are ideal for applications requiring excellent temperature distribution and heating. Mechanical convection provides uniform heating, precise temperature control and fast drying. A blower circulates heated air in a horizontal airflow pattern for efficient heat distribution with tight temperature tolerances of up to ±0.5°C. Temperature is displayed on large, three-character screen; can be easily set from 5°C above ambient to up to 75°C (depending on model) in 0.1°C increments using touch-sensitive arrow keys.
Photo of High-Performance Gravity Convection Incubator
Thermo Scientific Precision High-Performance Incubators with mechanical convection are ideal for applications requiring excellent temperature distribution and heating. Gravity convection offers gentle drying with heat-generated convection to move the air vertically through the chamber to heat samples. Temperature is displayed on large, three-character screen; can be easily set from 5°C above ambient to up to 75°C (depending on model) in 0.1°C increments using touch-sensitive arrow keys. The units come with sophisticated microprocessor PID controls and easy-to-view digital LED readout.
Photo of Precision Compact Gravity Convection Ovens
Thermo Scientific Precision compact heating and drying ovens conserve valuable benchtop space. Gravity convection models that provide the ideal choice for any application. Comes with a double-wall interior with 2.5cm (1 in.), silica-based insulation and a powder-coated, cold-rolled steel exterior. The pilot light visually indicates the oven's operation status. Gravity-Convection ovens have gentle drying with low turbulence: air is moved vertically through chamber to heat samples with less chance of disturbing them.
Photo of Precision Compact Mechanical Convection Ovens
Thermo Scientific Precision compact heating and drying ovens conserve valuable benchtop space. Mechanical convection models that provide the ideal choice for any application. Comes with a stainless-steel chamber, silica-based insulation and a powder-coated, cold-rolled steel exterior. The pilot light visually indicates the oven's operation status. Mechanical convection provide uniform heating, precise temperature control and fast drying. Comes with a hydraulic thermostatt. Additional shelves are sold separately. (Sample Photo Shown. Individual models may differ from the image shown.)
Photo of Precision Direct Drive Vacuum Pumps
Precision Direct drive vacuum pumps are available in 25 models with free air displacement ranging from 0.7 to 60 CFM (20 to 1699 LPM) and can be used as either roughing pumps for direct evacuations or as fore pumps in conjunction with diffusion pumps. Precision Direct Drive Pumps are designed to be quiet, operating with minimal noise and vibration. All our direct drive pumps are equipped with an anti-backstreaming baffle and gas ballast. Corrosion resistant models are available for extreme environment and hard use applications.
Photo of Precision Coliform Water Baths
Precision Model 251 and 253 Coliform Baths are designed specifically for fecal Coliform determination. Each bath is factory calibrated and can be field calibrated from the front panel without the use of tools. The preset temperature feature is standard on both Coliform baths for ease of use. Both baths meet stringent performance requirements. Microprocessor control with digital LED display. Easy to operate with a 4-position switch and 3 different heat settings. Easy-to-clean, rugged steel construction. Stainless steel gable cover and diffuser shelf is included.
Photo of Gable Covers for Precision Baths
Thermo Scientific Precision bath covers prevent cross-contamination by diverting condensation to sides for return to bath medium. Reduces moisture loss and water accumulation on the bench. Made of stainless steel or semi-transparent polycarbonate that can be attached to the side of the bath for storage. The cover comes with a handle for safety.
Photo of Precision General Purpose Water Baths with Analog Controls
Precision Model 180 series of water baths are ideal for applications in which the temperature set points seldom change. These economically priced baths feature a variable analog temperature control. Easy to maintain seamless stainless steel interior chamber and epoxy powder coated exterior resist corrosion and chemical damage. Over-temperature safety circuitry prevents thermal runaway. Free stainless steel gable cover and diffuser shelf with all baths except W5020-2 and 2E, which ships with a polypropylene gable cover. 120V and 230V models are available.
Photo of Precision General Purpose Water Bath w/Digital Controls

Precision Model 280 water baths feature a variable digital temperature control. Temperature is displayed on a bright 3-digit LED. Easy to maintain seamless stainless steel interior chamber and epoxy powder coated exterior resist corrosion and chemical damage. Over-temperature safety circuitry prevents thermal runaway. Free stainless steel gable cover and diffuser shelf with all baths except W5017-2, which ships with a polypropylene gable cover.

Photo of Precision Dual Chamber Water Baths
These Precision dual chamber water baths feature two equal 12-liter (3.2 gallon) chambers with independent temperature controls. Chamber dimensions: 11.5" L x 12.5" W x 6" H. Choose between models with either an analog (W5000-1) or digital (W5000-2) temperature controller. Easy to maintain seamless stainless steel interior chamber and epoxy powder coated exterior resist corrosion and chemical damage. Over-temperature safety circuitry prevents thermal runaway. Models listed are 120V. 230V models are available.
Photo of Circulating Water Baths with Microprocessor Controls. Precision
Precision Scientific Circulating Water Baths are ideal for applications where temperature uniformity and control are critical. Available in three different models, these high performance baths range in capacity from 19 liters to 89 liters and include a stainless steel diffuser shelf and a gable cover as standard equipment. Microprocessor control with digital LED display. Water flow is directed around bath perimeter. Elevated sample platform for more thorough circulation. Single switch control for heater and circulator pump. Over-temperature protection capability.
Photo of Precision Concentric Ring Steaming Water Baths
Precision Scientific Concentric Ring Steaming Baths are designed to gently warm samples, make concentrates, and melt solids such as agar. Available in both 4 opening and 8 opening models, they accommodate various sizes of glassware and evaporating dishes, including round bottom flasks. Flange-formed stainless steel rings nest smoothly and become progressively larger as each concentric ring is removed. Copper clad immersion heaters provide bath temperatures up to 100° C. Easy to operate with a 4-position switch and 3 different heat settings.
Photo of Thermo Scientific Precision™ Reciprocal Digital Shaking Water Baths

Thermo Scientific Precision™ Reciprocal Shallow Form Shaker Baths and Dubnoff Shaker Baths provide the gentle, reciprocating motion required for many common biological, tissue culture, and biotechnology applications. Both models are also suitable for use in applications that require a controlled atmosphere. Available with and without gassing hoods to control the environment around your important sample, and they have an optional O2/N2/CO2 flow meter. Microprocessor control with digital LED display and shaker control. Push button convenience for entry of temperature and shaking speed.

Photo of Precision Reciprocal Shaking Water Baths
Precision has designed their Reciprocal Shaking Baths for life science and QA/QC applications with two sizes to choose from. Both baths provide sample agitation with excellent temperature uniformity. The push button input of desired temperature and shaking speed help to make the baths easy to use, while meeting the stringent standards for laboratory testing. Microprocessor control with digital LED display and shaker control. Push button convenience for entry of temperature and shaking speed. Adjustable shaking speed from 30 to 200 OPM. Easy-to-clean, rugged steel construction.