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Mixing chemicals, especially for standard formulations, can add hours to the research and production process. Cole-Parmer provides a solution that saves you time (and costs) by eliminating this step—enabling chemists and related personnel to concentrate on other crucial tasks.
By using our custom-blending services for chemicals, you not only enhance your efficiency, you also ensure consistent quality guaranteed from batch to batch. Additionally, you improve safety within your facility by reducing the risk of chemical spills.
From 500 mL to 200 L, we can formulate and blend any combination of chemicals to your specifications. Whether you require a simple dilution or multiple chemicals in one solution, Cole-Parmer can respond to your needs. We can also supply your custom-blended chemicals in a specified container. To ensure quality, our custom-blended chemicals arrive at your facility with a Certificate of Analysis.
For more information on
custom-blending services, call
our Application Specialists at
800-323-4340.
Use the guide below to help you select the best type of pump for your application. This information is intended as a general guideline and will not hold true for all pumps within a classification; check individual pump specifications on the given product pages for complete details.
Pump type
Max flow
ranges
Max
press
Self-
primng
Pulseless
flow
Fluid
vscsty
Partic
mttr
Run
dry
Advantages
GPM
L/min
Air-operated
diaphragm
5.0 to
225
19.0 to
851
Up to
125 psi
Excllnt
Fair
Medium
Yes
Yes
Use for highly viscous or particulate-laden
fluids and where electric is not available
Bellows
0.008 to
26.4
0.03 to
100
Up to
73 psi
Good
Poor
Medium
Yes
Yes
Can pump liquids or gases
Centrifugal
2.3 to
1200
8.7 to
4542
Up to
275 psi
Poor
Excllnt
Light
No
No
Fluid transfer at high flow rates
and low pressures
Diaphragm
0.003 to
5.2
0.01 to
19.7
Up to
300 psi
Good
Poor
Medium
No
Yes
High-accuracy; for applications
such as pH/ORP control
Double-
diaphragm
1.0 to
4.0
3.79 to
15.1
Up to
95 psi
Excllnt
Fair
Medium
Yes
Yes
Use for viscous or
particulate-laden fluids
Drum
6.0 to
63.0
22.7 to
238
Up to
35 psi
Poor
Excllnt
Medium
No
No
Economical. No electrical parts
Flexible
impeller
3.8 to
50.0
14.4 to
189
Up to
60 psi
Excllnt
Excllnt
Light
No
No
Low-cost utility pump
Flexible
liner
1.0 to
10.0
3.8 to
37.8
Up to
50 psi
Excllnt
Excllnt
Medium
Yes
Yes
Gentle pumping action uses no
seals—pulseless, can run dry
Gear
0.006 to
74.0
0.026 to
280
Up to
1500 psi
Poor
Excllnt
Medium
No
No
Pulseless flow at high pressures
Hand
2.0 to
48
7.6 to
181.7
—
Good
Fair
Light
No
No
Economical. No electrical parts
Hose
0.66 to
68
2.5
257.4
Up to
220 psi
Excllnt
Poor
Medium
Yes
Yes
Noncontaminating; Use for high flow and
high pressure applications
Ismatec™
peristaltic
0.00002
to 1.43
0.00008
to 5.4
Up to
22 psi
Excllnt
Fair
Heavy
Yes
Yes
Noncontaminating; high accuracy; available
in a wide variety of tubing materials;
Manostat®
peristaltic
0.0008 to
1.3
0.003 to
5.0
Up to
25 psi
Excllnt
Fair
Heavy
Yes
Yes
Noncontaminating; available in
a wide variety of pump materials
Masterflex
peristaltic
0.0000034
to 12.0
0.013
45
Up to
100 psi
Excllnt
Fair
Heavy
Yes
Yes
Noncontaminating; available in
a wide variety of pump materials
Nutating disc
0.25 to
1.0
0.95 to
3.8
Up to
15 psi
Good
Poor
Medium
Yes
Yes
PTFE wetted parts;
positive displacement
Piston
0.004 to
107
0.015 to
405
Up to
5000 psi
Good
Poor
Medium
No
Yes
Highest pressure and accuracy;
ideal for HPLC applications
Pressure
Washer
2.0 to
4.0
7.6 to
15.1
Up to
3000 psi
N/A
Excllnt
Light
No
No
High pressure capabilities;
portability, heating
Progressing
cavity
0.5 to
13
1.9 to
49
Up to
100 psi
Fair
Excllnt
Very
heavy
Yes
No
Pulseless flow for highly viscous
or particulate-laden fluids
You can make inexpensive vodka taste as smooth as a top-shelf brand with a few easy maneuvers.
You Will Need
A bottle of cheap vodka
A water filter pitcher or food-grade activated charcoal
A mesh colander
Step 1
Pour vodka into a water filter pitcher to remove impurities, just as you would with water.
Step 2
When all the vodka has dripped through the filter, pour it into a clean pitcher and then put it through the filtering process again. Repeat at least three more times, for a total of five. Then chill and enjoy.
Step 3
If you don’t have a water-filter pitcher, put two inches of food-grade activated charcoal into a three-quarters-full bottle of vodka. Put the cap back on.
Find food-grade activated charcoal at home-brew supply shops or online.
Step 4
Shake the bottle for a few minutes every day for a week. Store it in the freezer at night and at room temperature during the day.
Step 5
After a week, separate the charcoal from the vodka by pouring it through the colander. Chill the filtered vodka in your freezer for several hours before drinking. Even the least expensive vodka tastes better when it’s cold.
Google has recently added flu vaccine information to Google Maps. Read below for more info.
This year, it’s especially important to have clear information on what you can do to prepare for the flu season. With this in mind, we are happy to share a new feature for the U.S. which allows you to more easily find locations near you for getting both the seasonal and H1N1 flu vaccine. After expandingGoogle Flu Trends to a total of 20 countries and 38 languages, allowing more people to see near real-time estimates of flu activity, we began brainstorming with the U.S. Department for Health and Human Services (HHS), their flu.gov collaborators and the American Lung Association on the flu shot finder and other ways Google can be helpful to people this flu season.
You can check out the flu shot finder at www.google.com/flushot. The same tool will also be available shortly on www.flu.gov and the American Lung Association websites. It’s important to note that this project is just beginning and we have not yet received information about flu shot clinics for many locations. In addition, many locations that are shown are currently out of stock. We launched this service now in order to help disseminate information about locations where vaccines are available, and also to make more vaccine providers aware of the project so that they can contribute.
Especially given slower than expected vaccine production, we think it’s important to bring together flu shot information in a coherent manner. We’ve been working with HHS, the Centers for Disease Control and Prevention (CDC) and state and local health agencies to gather information on flu vaccine locations across the country, particularly for the H1N1 flu vaccine (both the nasal-spray vaccine and the shot). At the moment we have data for locations of flu vaccine directly from 20 states and counting. We are also continuing to add information from chain pharmacies and other providers in all 50 states; today, you’ll find results from chains such as Walgreens, CVS and PDX participants, such as Kmart, Duane Reade, WinnDixie and Giant Eagle.
Of course you should still call flu vaccine providers ahead of time to find out more about availability and eligibility for the two vaccines.
We hope to continue providing you with relevant information to help keep you and your loved ones healthy.
Posted by Roni Zeiger, M.D., Product Manager and Jennifer Haroon, Product Marketing Manager. 11/10/2009 09:15:00 AM
When you are working with potentially hazardous chemicals, chemical compatibility is a crucial part of product selection, especially when selecting tubing, pumps, fittings, flowmeters, and other products. Using this database, you can be assured the materials that your products are made from will not be negatively affected by chemicals in the fluids or gases.
Our interactive online Chemical Compatibility Database is a smart, simple, and quick resource for finding the safest materials for your application. With its straightforward, easy-to-use interface, you’ll find definitive answers for all your chemical compatibility needs. It’s no wonder that this database is one of the most utilized tools on the Cole-Parmer Web site!
To see if your materials interact with the chemicals you wish to use, simply select your material and chemical used. If you have multiple materials or chemicals, you can select “All” to view a complete list of chemical effects. Click Submit to determine the compatibility level.
You can also refine your search by using the Compatibility Level option to see which materials have “A-Excellent” compatibility with a certain chemical.
For your safety, Cole-Parmer generally recommends those materials which have an “A-Excellent” compatibility with the selected chemical. You should never use a material with a chemical that has “D-Severe” compatibility.
Don’t forget to bookmark the Chemical Compatibility Database—this simple and important tool is guaranteed to help keep your workspace safe!
EW-48708-20
Handheld, lightweight, portable Digital Microscope, 1.3 megapixels, 10x to 200x magnification, USB connection
Digital Microscope
Active Pixel Technology produces sharp images and accurate color reproduction
Includes software for image/video capture and measurement
Use these digital microscopes for science and engineering work, assembly and quality control, detailed repair, forensics, and more. Six LEDs illuminate your object—turn the LEDs on or off and adjust the brightness using the control wheel on the body. For versions with the 10x to 200x magnification range, magnification automatically adjusts based on the distance from the object. Includes a basic stand with adjustable height; order optional boom stand for greater flexibility.
Capture images and videos through use of the included software (requires Windows® XP, SP2, or Vista). The software also includes a measurement function, brightness and contrast controls, digital zoom, and date and time record.What’s Included: software and microscope stand.
October 2009 marks the 80th anniversary of the Van de Graaff electrostatic generator. While this machine is widely recognized for its loud sparks and hair-lifting demonstrations, more importantly it represents a significant benchmark in the production of static electricity at high voltages.
Dr. Robert J. Van de Graaff developed the electrostatic generator in 1929 while he was a research fellow at Princeton University. He moved to the Massachusetts Institute of Technology where, between the years of 1931 and 1933, he crafted a larger generator that produced significantly higher voltages. While at MIT, he developed the world’s largest Van de Graaff generator which is currently displayed at the Boston Museum of Science.
The Van de Graaff generator is sometimes mistaken for the Tesla coil because of similarities in appearance. However, Nikola Tesla’s invention—which predates the Van de Graaff generator by nearly 40 years—has a completely different function. The Van de Graaff generator creates static electricity, while the Tesla coil creates high-voltage current electricity that is transferrable through the air into other objects (e.g. a light bulb). Nevertheless, Tesla recognized the generator’s potential in the 1934 article titled “Possibilities of Electrostatic Generators,” when he referred to the Van de Graaff generator as a “remarkable device,” agreeing with the assertion “with which wonders will be achieved.” †
Tesla’s statement would prove to be correct. Because of its use of a power supply to a produce continuous static electricity, the Van de Graaff generator quickly eclipsed previous electrostatic models.
Basic principles of the Van de Graaff generator
They come in many sizes, but each Van de Graaff generator is comprised of three central components: the terminal, a belt and pulley system, and a motor. The terminal is the insulated hollow metal sphere elevated at the highest point of the machine where the current is expelled.
The belt and pulley system features an insulating belt which transfers charges to the terminal. The belt creates static through friction with a metal electrode, also known as a needle or comb. There are two pulleys—each with a corresponding electrode—in place: one at the bottom of the machine, connected to the motor, and another positioned within the base of the terminal. One side of the belt carries a positive charge, while the opposite carries a negative charge. Both pulleys are contained in a hollow cylinder that is connected to the sphere.
Lastly, at the base, a switch-operated motor powers the generator.
The mother of all science fair projects
Constructing your own Van de Graaff can be a fairly straightforward process. Moreover, it is a safe, cheap, and fun way to demonstrate the properties of static electricity. To commemorate the Van de Graaff generator’s 80th birthday—and to help you stay on the cutting edge of the 20th century—here are few pointers to consider when building your generator:
The most crucial part of the generator is the terminal. As such, to achieve the greatest charge, you should only use a round hollow sphere made of stainless-steel or aluminum. To test the effectiveness of the generator, you can place a negatively charged metal object close to sphere to make a spark. Even more illustrative, place your hands on the sphere and in an instant the hairs on your head will stand up.
The belt is also very important. To create the most static, use a belt made of vinyl or silk. Be sure that the belt is bound tightly to the pulleys so it is unable to move laterally. (Also, bear in mind, the belt and terminal are the most difficult pieces to replace.)
To ensure your machine stays intact, use a strong adhesive to firmly attach the metal sphere to cylinder—PVC piping is highly recommended—surrounding the belt.
The electrodes are also pivotal in the performance of your generator. For both pulleys, position the ends of electrodes close to the belt without touching it.
Lastly, make sure your surrounding conditions are not damp or humid. The generator may not work in such conditions.
If you would like assistance in building your own Van de Graaff generator, talk to a Cole-Parmer Application Specialist. These experts enjoy walking through all types of projects—be it challenging, mundane, or fun! Cole-Parmer also offers Custom Ordering Solutions to meet any desired product modifications.
To help you choose the proper safety gloves, Cole-Parmer offers a detailed Safety Glove Chemical Compatibility Database* containing information about how glove materials interact with various chemicals. This convenient resource eliminates the time you spend sorting through multiple Web sites and paper charts to determine compatibility. Simply select your chemical from more than 190 options. A chart will appear listing specific gloves (culled from a variety of glove manufacturers) and how they are rated for that material.
The database rates the glove material and chemical compatibility by degradation and permeability. Degradation refers to a reduction in one or more physical properties of a glove material. For example, when coming into contact with a particular chemical, certain gloves may become stiff or brittle and their performance is impaired.
On the other hand, permeation enables a chemical to pass through a protective film without going through pinholes, pores, or other visible openings. The chemical’s molecules enter the film and pass between the molecules of the glove. This process is not always visible to the eye and can also reduce safety.
Keep in mind that permeation and degradation are not always correlated. In addition to these quality-specific ratings, the database offers an overall rating for chemical compatibility (from excellent to not recommended).
*Note: The information in the Safety Glove Chemical Compatibility Database was supplied to Cole-Parmer by other reputable sources and is to be used ONLY as a guide in selecting gloves for chemical compatibility testing. Variability in material thickness, chemical concentration, temperature, and length of exposure to chemicals will affect specific performance. Always test the products with the specific chemicals and under the specific conditions of your application.
Mixing chemicals, especially for standard formulations, can add hours to the research and production process. Cole-Parmer provides a solution that saves you time (and costs) by eliminating this step—enabling chemists and related personnel to concentrate on other crucial tasks.
From 500 mL to 200 L, we can formulate and blend any combination of chemicals to your specifications. Whether you require a simple dilution or multiple chemicals in one solution, Cole-Parmer can respond to your needs. We can also supply your custom-blended chemicals in a specified container. To ensure quality, our custom-blended chemicals arrive at your facility with a Certificate of Analysis.
