HM Digital AP-1 AquaPro Water Quality Tester TDS (Magnetic body)

You looking to find the "HM Digital AP-1 AquaPro Water Quality Tester TDS (Magnetic body)" Good news! You can purchase HM Digital AP-1 AquaPro Water Quality Tester TDS (Magnetic body) with secure price and compare to view update price on this product. And deals on this product is available only for limited time.

Price: $20.50 $14.00   

Product Feature

• Measures total dissolved solids (TDS) and temperature
• Automatic Temperature Compensation (ATC)
• Water-resistant housing
• Digital Calibration (push button)
• Auto-off function, data-hold function and low-battery indicator.

Product Description

HM Digital introduces its new AquaPro series, a line of handheld TDS/EC meters with a sleek design that's perfect for today's modern kitchen. The AquaPro digital water testers are the next generation for today's tech-savvy and health-conscience consumer.

HM Digital AP-1 AquaPro Water Quality Tester TDS (Magnetic body) Review

If you're interested in the quality of the drinking water coming into your home, the HM AP-1 TDS (total dissolved solids) digital meter is an excellent budget priced solution. The AP-1 is a step up from the entry level TMZ series but offers three additional features for a slight difference in price, the most important is that it is rated water resistant (important for a unit that is immersed in water regularly). The other two upgrades are a water temperature reading, and a magnetic housing so it can be conveniently attached to a refrigerator door. A nice salient feature is that the unit shuts off in ten minutes if you forget to power it down. The unit responds quickly with accurate readings. My incoming water readings were good, but checking my two water filters, there was only 3-5 point difference that was enlightening. Overall, a great inexpensive solution if you're interested in this data.

Most of the consumer Reviews tell that the "HM Digital AP-1 AquaPro Water Quality Tester TDS (Magnetic body)" are high quality item. You can read each testimony from consumers to find out cons and pros from HM Digital AP-1 AquaPro Water Quality Tester TDS (Magnetic body) ...

Veho VMS-004 Discovery Deluxe USB Microscope with x400 Magnification & Flexi Alloy Stand

You looking to find the "Veho VMS-004 Discovery Deluxe USB Microscope with x400 Magnification & Flexi Alloy Stand" Good news! You can purchase Veho VMS-004 Discovery Deluxe USB Microscope with x400 Magnification & Flexi Alloy Stand with secure price and compare to view update price on this product. And deals on this product is available only for limited time.

Price: $49.99 $49.98   

Product Feature

• 2.0 Megapixel OMOS lens
• Up to x400 digital USB microscope with snapshot and video capture and measurement software
• On/Off LEDs for object illumination
• Alloy Stand and Stand alone Capture Button
• Tacton Rubber Touch Housing
• Pc and Mac Compatible

Product Description

Handy desktop 400x magnifying USB Microscope

Veho VMS-004 Discovery Deluxe USB Microscope with x400 Magnification & Flexi Alloy Stand Review

I just bought this microscope and after some initial disappointment, because I didn't really know how to use it and the documentation that comes with it is almost useless, I am now quite pleased with it. There is some confusion in reviews here over what this microscope can do -- is it really a 400x power microscope? The advertising describes it as "Magnification: 20x - 400x (Plus digital zoom in 640x480 mode)" Does that mean it can continuously zoom from 20X to 400x? The manual that comes with it does not really tell you how to use it. So I did a little experimentation, and found that it really has two fixed magnifications, appx. 20x and appx. 400x.

There is a cylindrical drum you can twist for focusing the microscope. As you turn it an internal lens moves up and down the barrel, changing the distance to the specimen. On the drum, there's a scale, with markings from 20 to 400 on it, that is quite misleading -- it suggests that you can optically zoom continuously from 20x to through 400x. But that is not the case. Instead, there are two fixed magnification levels, one nominally 20x and one about 400x, corresponding to two different focus locations, and they do not correspond to the locations on the scale you would expect!

Using it at 20x power:

If you place a specimen, like a piece of paper, directly under the microscope and place the clear plastic end of the microscope directly on the paper, the 20x focus occurs when you turn the drum beyond the top of the scale, past the 400, then a little past the 20 mark as the scale starts repeating. At this focal point the internal lens is moved up the tube, far from the specimen. The field of view is 13.5 mm. You can then move the microscope farther from the paper, readjusting the focus as necessary. You can even move the microscope quite far from the specimen, and still be able to focus it with 20x magnification. When it is focused at infinity, (at the extreme end of the scale, about 60 over the top), the field of view is 11.2 degrees, or about 3" wide when the subject is 12" from the end of the microscope.

Using it at 400x power:

To get the the 400x magnification, again place the clear plastic end of the microscope directly on the specimen, say a dollar bill. The 400x focus location occurs when the drum is rotated beyond the bottom of the scale, to the 400 below the 20 mark. At this point, the internal lens is moved down the tube, to nearly as close to the specimen as it can get (about 22mm). The field of view is only about 0.8 mm, or 2 degrees. Most users would never notice that the microscope can focus at the 400x magnification: to attain it you must move the focus lens to nearly the full bottom of its travel; it is easy to go through the focal region too quickly to see it; and the documentation makes no mention of it. People may think the higher magnification is obtained by zooming in digitally on your computer screen, without realizing that the microscope focuses with high magnification itself. You'll need to turn on the LED illumination for the 400x scale to get an image. (There are eight white LEDs that provide good even illumination, not four as advertised.)

Zooming:

As well as these two focus regimes, there is a software zoom option. If you choose a capture size of 640x480 you can go to the preferences menu and choose zoom to zoom in digitally. The field of view zooms from 13.5mm down to 4.2 mm.

Measuring actual magnification:

The 20x and 400x are only approximage values, but you can measure the actual magnification by viewing a millimeter ruler or finer reticule if you have one. If the image capture size is set to 1280x960, I find that the width of the field of view is 13.5 mm at the "20x" focus, and about 0.8 mm at the "400x" focus. (about a 17x difference) The resolution, that is, the size of a single pixel in the field of view, is 13.5mm/1280= 10.5 microns for the "20x" focus, and 0.8mm/1280=0.6 micron for the "400x" focus. (Of course, the optics aren't perfect, and it appears to me that at the "400x" focus the optical resolution is about 3 pixels, that is, the smallest features you can see are about 2 micron in size. The magnification you see on your computer screen depends on the screen pixel size, also called the pixel pitch. Mine is 0.282 mm (or 90 pixels per inch, most LCD screens are 90-100 pixels/in.). For my screen, the two actual magnifications are then, 1280*0.282mm/13.5mm = 26.7x and 1280*.282mm/0.8mm = 451x. This is for viewing on the computer screen at "actual size", not zooming in.

Measuring object sizes:

The software allows you to measure objects with rulers you can draw over a picture, but you need to enter the actual magnification to calibrate the software ruler. They suggest you take that reading from the scale on the microscope, but there's so much up and down play in the focus drum that you can't rely on its readings for the true magnification. It's best to calibrate the field of view by taking a picture of a millimeter ruler. Then you know what true size the full width of the captured image corresponds to. That works well for the appx. 20x focus point. Unfortunately, the magnification box allows entry of only integers up to 220, so you can't enter an actual magnification, like 451, to get accurate numbers.
Even so, you can measure object sizes and do the math yourself. In particular, you can use the software ruler to measure sizes in pixels with a magnification factor of one, and get an accurate pixel measurement.

Saving images:

The software lets you save the images in uncompressed *.bmp or compressed *.jpg file formats. You can choose the level of compression for the *.jpg files; remarkably, the 3.7 MB files (1280x960x3bytes) can be compressed to about 100KB without much loss of resolution.

Image resolution:

Despite the ad hype, the sensor is not a 2 megapixel (Mp) sensor -- the spec sheet in the instruction manual says it is 1.3 (Mp). The maximum resolution is attained when you choose an image size of 1280x960 = 1.23 Mp. Although there is an option for capturing images at 1600x1200, those images are interpolated, and don't result in any greater actual resolution.

With these considerations in mind, you'll find that this microscope is a great value for the money, and you can take some really good photomicrographs with it.

Most of the consumer Reviews tell that the "Veho VMS-004 Discovery Deluxe USB Microscope with x400 Magnification & Flexi Alloy Stand" are high quality item. You can read each testimony from consumers to find out cons and pros from Veho VMS-004 Discovery Deluxe USB Microscope with x400 Magnification & Flexi Alloy Stand ...

25 Pack Pyex Glass Test Tubes 4-inch 13x100mm

You looking to find the "25 Pack Pyex Glass Test Tubes 4-inch 13x100mm" Good news! You can purchase 25 Pack Pyex Glass Test Tubes 4-inch 13x100mm with secure price and compare to view update price on this product. And deals on this product is available only for limited time.

Price: $2.95    

Product Feature

• Dimensions are approximately 1/2 inch OD and 4 inch Height
• 25 tubes total
• Tube Material is Borosilicate Glass

Product Description

These 13x100mm PYREX® disposable round bottom culture tubes hold approximately 10mL and are made of borosilicate glass to reduce pH changes and contaminants potentially leached from soda-lime glass.

25 Pack Pyex Glass Test Tubes 4-inch 13x100mm Review

25 pyrex test tubes delivered promptly, safely wrapped in an ample wad of bubble wrap. durable pyrex will deform under conditions of very high heat (around 1500 degrees F), but won't break as normal glass would with uneven heating/reheating after deforming.

Most of the consumer Reviews tell that the "25 Pack Pyex Glass Test Tubes 4-inch 13x100mm" are high quality item. You can read each testimony from consumers to find out cons and pros from 25 Pack Pyex Glass Test Tubes 4-inch 13x100mm ...

Adson Tissue Forcep 1x2 Teeth 4-3/4" Ea

You looking to find the "Adson Tissue Forcep 1x2 Teeth 4-3/4" Ea" Good news! You can purchase Adson Tissue Forcep 1x2 Teeth 4-3/4" Ea with secure price and compare to view update price on this product. And deals on this product is available only for limited time.

Price: $2.25 $1.95   

Product Description

Adson Tissue Forcep 1x2 Teeth 4-3/4" Ea The product referenced on this detail page is sold be Each.

Adson Tissue Forcep 1x2 Teeth 4-3/4" Ea Review

The item states Henry Schein adson PU. The ones that arrived are a CHEAP Pakistani single use sterile adson PU. NOT THE SAME THING BY ANY MEANS. Returned immediately. Have not yet received credit.

Most of the consumer Reviews tell that the "Adson Tissue Forcep 1x2 Teeth 4-3/4" Ea" are high quality item. You can read each testimony from consumers to find out cons and pros from Adson Tissue Forcep 1x2 Teeth 4-3/4" Ea ...

OMAX 40X-2000X Digital Lab LED Binocular Compound Microscope with Built-in 1.3MP USB Camera and Double Layer Mechanical Stage

You looking to find the "OMAX 40X-2000X Digital Lab LED Binocular Compound Microscope with Built-in 1.3MP USB Camera and Double Layer Mechanical Stage" Good news! You can purchase OMAX 40X-2000X Digital Lab LED Binocular Compound Microscope with Built-in 1.3MP USB Camera and Double Layer Mechanical Stage with secure price and compare to view update price on this product. And deals on this product is available only for limited time.

Price: $299.95 $289.95   

Product Feature

• High quality professional optical glass elements; 45 degree inclined 360 degree swivelling binocular head; Built-in 1.3MP USB Camera with Advanced Software (Windows & Mac Compatible)
• 8 levels of magnification: 40X-80X-100X-200X-400X-800X-1000X-2000X; 4 achromatic objectives DIN 4X, 10X, 40X(S), 100X(S,Oil); 2 pairs of eyepieces: WF10X and WF20X
• Sliding interpupillary distance adjustment; Ocular diopter adjustable on both eyetubes; Variable intensity illumination; Coaxial coarse and fine focus adjustment; Focusing knobs on both sides
• Stage upward moving lock protects objectives and slides; Stain-resistant double layer mechanical stage; NA1.25 Abbe Condenser with iris diaphragm & filters; Rack and pinion adjustment condenser
• 5 Year Warranty;

Product Description

Packing List: Binocular microscope with 4 DIN objectives; Eyepieces: a pair of WF10X and a pair of WF20X; A bottle of Immersion oil; AC adapter (US and Canada standard); Dust cover; Color filters; CD (camera driver and software); USB2.0 cable

OMAX 40X-2000X Digital Lab LED Binocular Compound Microscope with Built-in 1.3MP USB Camera and Double Layer Mechanical Stage Review

"I recently purchased this microscope and after several days of use, I realized this microscope is well worth how much we have paid. The LED light is bright and the control is very smooth! I was little hesitate before making the purchase decision since the price for this typical microscope was lower than some other similar models. Luckily, I found a review for this "OMAX 40X-2000X Biological Compound Microscope" on YouTube and it was really helpful. I asked the seller and been told this is just the same model, but with a built-in digital camera. The camera actually adds so much fun when using the microscope. I can actually view live images on my Mac and PC, and save the pictures/videos on my computers. I highly recommend this microscope."

Most of the consumer Reviews tell that the "OMAX 40X-2000X Digital Lab LED Binocular Compound Microscope with Built-in 1.3MP USB Camera and Double Layer Mechanical Stage" are high quality item. You can read each testimony from consumers to find out cons and pros from OMAX 40X-2000X Digital Lab LED Binocular Compound Microscope with Built-in 1.3MP USB Camera and Double Layer Mechanical Stage ...

Nalgene Meadow Jar, 8-Ounce, Green

You looking to find the "Nalgene Meadow Jar, 8-Ounce, Green" Good news! You can purchase Nalgene Meadow Jar, 8-Ounce, Green with secure price and compare to view update price on this product. And deals on this product is available only for limited time.

Price: $4.99 $4.61   

Product Feature

• Tough and impact resistant
• Dishwasher safe and won't retain odors
• BPA Free Container

Product Description

With straight sides and no shoulders, they're excellent for difficult to dispense foods such as peanut butter and honey; The 16 and 32 Oz; sizes are not guaranteed leak proof and are not recommended for taking liquids on the trail. Available in polycarbonate or polypropylene.

Nalgene Meadow Jar, 8-Ounce, Green Review

I have used these to bring food to work. They are tough, water-tight (no spilling in my backpack), and microwave safe. I strongly recommend them. Even with heavy use, they will last you a decade.

Most of the consumer Reviews tell that the "Nalgene Meadow Jar, 8-Ounce, Green" are high quality item. You can read each testimony from consumers to find out cons and pros from Nalgene Meadow Jar, 8-Ounce, Green ...

10 Pack - 6-inch, 16x150mm Glass Test Tubes with Cork Stoppers

You looking to find the "10 Pack - 6-inch, 16x150mm Glass Test Tubes with Cork Stoppers" Good news! You can purchase 10 Pack - 6-inch, 16x150mm Glass Test Tubes with Cork Stoppers with secure price and compare to view update price on this product. And deals on this product is available only for limited time.

Price: $9.99    

Product Feature

• Tempered Glass
• 6-inches Long, 5/8 Inch Wide, 3/4 oz Volume
• 16x150mm and 23ml Volume
• High Quality Cork

Product Description

They are made of borosilicate glass to reduce pH changes and contaminants potentially leached from soda-lime glass.

10 Pack - 6-inch, 16x150mm Glass Test Tubes with Cork Stoppers Review

I was very excited to receive these test tubes as I was using them to make a spice rack for my girlfriend for Valentine's Day. I opened the box and the test tubes were just packed on top of each other with only some packing paper around the box. Needless to say, one of the test tubes was shattered when I opened it. Terrible way to ship thin pieces of GLASS. Luckily, I only needed 9 of the tubes for my project. However, as soon as I tried to put a cork in the top, the rims shattered as well. The cork was hardly 1/10th inch into the tube when it broke. This happened twice before I gave up. I didn't want to deal with cleaning up any more broken glass!

They do look identical to the picture. These are EXTREMELY FRAGILE so keep that in mind for whatever you plan on doing with them.

Most of the consumer Reviews tell that the "10 Pack - 6-inch, 16x150mm Glass Test Tubes with Cork Stoppers" are high quality item. You can read each testimony from consumers to find out cons and pros from 10 Pack - 6-inch, 16x150mm Glass Test Tubes with Cork Stoppers ...

Plastic Square Weigh Boats Small Dish 100pk

You looking to find the "Plastic Square Weigh Boats Small Dish 100pk" Good news! You can purchase Plastic Square Weigh Boats Small Dish 100pk with secure price and compare to view update price on this product. And deals on this product is available only for limited time.

Price: $4.95    

Product Feature

• Material is virgin polystyrene
• 1 3/4 inch width x 3/8 inch depth
• Approximate volume is 20 ML
• Extra smooth surface for less waste
• Sold as 100pk

Product Description

These square weigh dishes are manufactured from virgin polyethylene and feature an extra smooth surface and rounded corners to provide easy removal of samples. These weigh boats are safe, economical containers for weighing liquid or powdered samples in the laboratory. They provide accurate pour-outs with minimal sample loss. Versatile and durable, dishes can also be used as quick freeze trays for sample material, discard trays for broken ampules, or mixing trays for small batches.

Plastic Square Weigh Boats Small Dish 100pk Review

The product has worked well for me. Not much sticks to them, although a coupple of mine came with holes in them.

Most of the consumer Reviews tell that the "Plastic Square Weigh Boats Small Dish 100pk" are high quality item. You can read each testimony from consumers to find out cons and pros from Plastic Square Weigh Boats Small Dish 100pk ...

10ml Empty Borosillicate Sealed Sterile Serum Vials - 5 Pack

You looking to find the "10ml Empty Borosillicate Sealed Sterile Serum Vials - 5 Pack" Good news! You can purchase 10ml Empty Borosillicate Sealed Sterile Serum Vials - 5 Pack with secure price and compare to view update price on this product. And deals on this product is available only for limited time.

Price: $13.70 $8.79   

Product Feature

• 5 10ml sterile vials

Product Description

Clear 10 ml certified depyrogenated and sterile vials. These sterile vials are Type 1 borosilicate assembled with butyl stoppers and colored aluminum seals. Neck size is 20mm. Sterilization is performed in an FDA inspected facility, operating to cGMP compliance. All sterilization processes are carried out under strict Class 100 U.S. Pharmacopoeia and Federal Code of Regulations methodologies. Assembled units are sterile and free of all endotoxins and meet the FDA's mandated 14-day sterility testing protocol. Ideal for analytical laboratories, compounding pharmacies, veterinarians, etc.

10ml Empty Borosillicate Sealed Sterile Serum Vials - 5 Pack Review

I ordered the product, they came before I was expecting. All were bubble wrapped and everything was great. I would order from them again.

Most of the consumer Reviews tell that the "10ml Empty Borosillicate Sealed Sterile Serum Vials - 5 Pack" are high quality item. You can read each testimony from consumers to find out cons and pros from 10ml Empty Borosillicate Sealed Sterile Serum Vials - 5 Pack ...

Sterile 6" Cotton Tip Applicator

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Price: $9.00 $5.33   

Product Feature

• Sterile, cotton-tipped applicators make it easy to meet medical and diagnostic needs
• Applicators are latex-free

Product Description

Medline Industries Sterile 6" Cotton Tip Applicator MDS202000 First Aid Kits

Sterile 6" Cotton Tip Applicator Review

The cotton tip applicators are made well just like the ones that are used in the doctor's office. However, the package does not have a cm ruler on it like the other ones I used did. You will need to have an actual ruler if you are documenting dimension changes.

Most of the consumer Reviews tell that the "Sterile 6" Cotton Tip Applicator" are high quality item. You can read each testimony from consumers to find out cons and pros from Sterile 6" Cotton Tip Applicator ...