Commercial salad spinner

Commercial salad spinner

Some food preparations

Pizza Scales Tomato Slicers Globe Mixer Parts and Accessories Commercial Food Processor Parts and Accessories Commercial Immersion Mixers Bread Slicers Bagel Slicers Vacuum Packaging Machine Bags Vacuum Packaging Machine Parts and Accessories Food Dehydrator Parts and Accessories They have a drainage insert, allowing water to drain quickly and easily to the spinner’s bottom and stay separate from your vegetables. The crank on manual commercial salad dryers lets you spin the insert as long as possible before you extract water.

Choose from different dryer sizes to fit several lettuce heads at a time. Some of our commercial salad spinners come with hoses in the bucket’s bottom, so you can drain water and avoid salad re-soaking. Besides manual choices, you can also select an electric salad spinner, suitable for large commercial facilities such as cafeterias, nursing homes and health care facilities that need to wash and dry large amounts of lettuce and greens.

If you’re serving massive quantities of house salad at your restaurant or having a fully stocked salad bar at your buffet, an industrial salad spinner can cut down on preparation time and keep your lettuce soggy. Although a salad dryer is ideal for washing lettuce, spinach, kale, and other greens, after washing you can use these items to dry many different vegetables.

Best of all, you can find lettuce spinners in a variety of sizes and capacities so you can choose the one that best fits your establishment’s needs. Check out our vegetable cutters, mandolins and other great products from Option Cambro Hobart Rubbermaid Sammic Matfer Bourgeat and Delfield for additional food preparations.

CMI 5 Gal/20 Qt Large Commercial Salt Spinner Jumbo Manual Lettuce Dryer-Dries up to 7 Heads of Lettuce MUELLER Large 5L Salt Spinner Vegetable Washer with Bowl, Anti-Wobble Software, Lockable Colander Basket and Smart Lock Cover – Lettuce Washer and Dryer – Quick Water Drain System and Portable Storage Dynamic E001 Manual Salt Spinner 2.5 Gallons, Dries up to 4 Heads of Lettuce Wutfly 5 Gallon Large C

What’s a salad spinner and what’s it for?

Commercial salad spinners and lettuce dryers range from large bins with spigots to water drain to countertop baskets with hand cranks to huge automated systems that are suitable for high-volume operations. Regardless of their design, these units are all intended to help operators protect consumers from foodborne diseases most commonly transmitted by unwashed goods without serving soggy salads. In certain situations, water may run over lettuce and other vegetables when in the machine, while others may spin water off food washed in another vessel. Ensuring salads are dry before serving offers better-tasting meals for consumers and helps minimize dressing use, which can help operators increase profit.


The grant PAR-16-137 and the Food Safety Outreach Program award 2016-70020-25792 accession 1010528 provided support for this publication. The opinions expressed in written materials or media and by speakers and moderators do not generally reflect U.S. official policies. Health and Human Services Department or U.S. Department of Agriculture; nor does any mention of trade names, business practices, or organization indicate U.S. government endorsement.

Introduction to

Anemia poses a significant challenge to developing-world health. Two billion people, about one-third of the world’s population, are anemic. Anemia accounts for substantial developmental morbidity and mortality. Nutrient shortages and infectious diseases such as human immunodeficiency virus infection, measles, hookworm, and tuberculosis lead to high anemia in poor areas.

Currently, many cases of anemia remain undetected due to lack of funding, infrastructure and training programs to support basic diagnostic laboratory facilities for measuring hematocrit or hemoglobin levels, especially in rural areas.

Methods for calculating low-resource hemoglobin levels include the color scale of the World Health Organization and Hemoglobin (HemoCue AB, Ängelholm, Sweden). The color scale of the World Health Organization, while user-friendly and accessible, is subject to error based on reader perception.

The HemoCue device is more reliable, but relies on disposable cuvettes, is more costly and requires batteries, sometimes inaccessible or expensive in low-resource settings.

Benchtop centrifuges are the standard for measuring hematocrit in developed nations, but like the HemoCue system, they are often inaccessible in low-resource settings due to power requirements and cost.

In developing regions, there remains a major unmet need for low-cost, portable tools that do not require electrical power to allow health care providers to accurately diagnose anemic patients. This article introduces a new hematocrit determination technique that meets these requirements.

We define the manual centrifuge creation based on a commercial salad spinner. Results determined with the hand-powered centrifuge are compatible with those obtained by using a benchtop centrifuge in a wide range of hematocrit values.

Centrifuge hand-powered.

The hand-powered centrifuge concept is based on a commercial salad spinner (OXO Nice Grips Salad Spinner, $29.99; OXO, Chambersburg, PA). With continuous manual pumping, the basket averaged 600 revolutions per minute (RPM). An insert was designed to carry microcapillary tubes 70° in the salad spinner basket ( Figure 1 ). A 17-cm plastic circle was cut to act as the sample holder frame.

A 12-cm-diameter cylindrical plastic container was glued to the base center. Five 6-cm segments of fine-toothed combs were glued to the plastic base and the cylindrical plastic container’s inner rim, forming two concentric circles. Tape was folded over each comb segment’s upper portion to ensure the microcapillary tubes were firmly in place.

The insert was designed to hold microcapillary tubes between the teeth of the comb to a 70° angle between the plastic base and the microcapillary tubes. The operator does not need to calculate this angle: while the top and bottom of the tube rests in the supports, the tube is held at 70° angle. This angle is the same tube angle as a test-controlled ZIPocrit Centrifuge (LW Science Inc., Lawrenceville, GA).

Slots were etched to keep the bottom of the microcapillary tubes in place. When one tube is mounted between each pair of comb teeth, the hand-powered centrifuge can handle up to 30 tubes simultaneously. The hand-powered centrifuge should be disinfected for laboratory-grade centrifuges according to Biosafety Level 2 guidelines, which states that a spill in a centrifuge requires decontamination of the centrifuge and spill site using a suitable disinfectant such as a 10% bleach solution.

Policy debate

This paper reports a compact, low-cost, hand-powered centrifuge designed for low-resource use. The centrifuge is inexpensive and easy to create with commercial salad spinner. Device components cost less than US$35.00. The centrifuge weighs only 1.2 kg and is compact enough to move between central health facilities and smaller villages.

The system includes blood samples in microcapillary tubes and the salad spinner cup. If blood spill or a glass tube breaks, the possibility of biohazard and sharpness is stored in the bowl, and the salad spinner’s plastic surface can be easily sanitized by using a 10 percent bleach solution, according to the Biosafety Level 2 guidelines, without affecting the centrifuge’s RPM.

The system is easy to use. Users are told to depress the salad spinner pump at the same pace as the metronome 120 beats per minute. Based on input from 10 operators, this pumping rate did not result in a substantial increase in user fatigue over 10 minutes.

Each comb section in the salad spinner can easily accommodate six microcapillary tubes, so up to 30 samples can be accurately measured at once. For more than eight patients, the hand-powered centrifuge is more effective than ZIPocrit, which takes five minutes to centrifuge four microcapillary tubes.

The hand-powered centrifuge was not as complete as the ZIPocrit electrical bench top centrifuge. However, in all hematocrit values tested, the ratio of PCV measured with the hand-powered centrifuge to that measured with ZIPocrit was found to be constant.

Using the hand-powered centrifuge and a calibrated reader card allowed precise prediction of hematocrit values. Additionally, the Bland-Altman study verified that the calibrated reader card correctly predicted hematocrit values across different hematocrit values. Differences in the PCV measured with the hand-powered centrifuge are possibly due to decreased centrifugal force in the hand-powered centrifuge.

Studies from the 1950s investigated the relationship between centrifugal force, centrifugal time, and hematocrit assessment accuracy.

These studies showed that calculating PCV contributes to hematocrit overestimation due to trapping small amounts of plasma between the erythrocytes in the packed erythrocyte column. The RCF and centrifugation time fraction of trapped plasma was higher. To estimate the fraction of trapped plasma in the packed erythrocyte column, researchers have mixed blood samples with either small amounts of radioactively labeled protein or high absorbing molecular dye.

Packed cell column radioactivity or optical density may be calculated to determine the fraction of trapped plasma. Using samples labeled with Evans blue dye, Chalin and Mollison found that the sample-trapped plasma fraction decreased from 4.35% ± 0.62% at 30 minutes to 2.5% ± 0.13% at 55 minutes.

Similarly, Bernstein found that the fraction of trapped plasma ranged from 1.8% to 3.0% for samples centrifuged at 2.050 g for 45–60 minutes.

Using samples mixed with 131I-labeled albumin, England and others found that for 5 minutes centrifuging samples achieved minimum plasma trapping that averaged 3 percent; no further reduction in trapped plasma was observed after this time.

The fraction of trapped plasma present in ZIPocrit centrifuge samples corresponds to these values. The fraction of trapped plasma contained in samples prepared with hand-powered centrifuge accounts for the reader card modification.

A similar system was created to extract serum from blood using an egg beater.

This application used plastic tubing to carry blood samples instead of microcapillary tubes. The egg beater rotated the samples at around 1200 RPM, twice the RPM reached by the hand-powered centrifuge. However, considering the difference in RPM, we have calculated that the hand-powered centrifuge achieves an acceptable rotational speed when proper adjustments are made to the reader card to account for trapped plasma.

While the hand-powered centrifuge meets the constraints associated with use in the developing world and has proven successful in a regulated laboratory environment, its efficiency still needs to be tested under clinical conditions by using more patient samples.

Assessment of hand-powered centrifuge’s useful lifespan, including longevity, ability to maintain constant rotational speed, user fatigue, and design scalability, must be considered. Restricted human capital in low-resource settings may also hinder user adoption.

Based on our tests, we assume the hand-powered centrifuge’s most fragile part is the insert holding the samples. Future insert creation, requiring mass production of a custom insert that would operate the same way as the current prototype insert, would be needed to improve its durability.

With more field testing and possible alteration, the hand-powered centrifuge has the potential to become an applicable method to improve anemia diagnosis and associated diseases within low-resource settings constraints.

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