New! Checkit® Go – Verify accuracy of pipetting in seconds
Breakthrough technology gets the job done in seconds!
** Contact Us to get a free sample. **
Checkit Go disposable cartridge instantly checks accuracy of liquid handlers and multi-channel pipettes
The Checkit Go is an easy-to-use, stand-alone, disposable cartridge that allows you to check the accuracy of your liquid handling robot or multi-channel pipette in just seconds. No additional equipment is required. The Checkit Go is interchangeable with well plates, so it works with all robots that handle 96 well plates. Compatible with all makes of multi-channel or electronic pipettes.
Fast and Convenient – verify up to 8 channels in seconds
This surprisingly simple device measures the dispensed volumes of up to 8 channels simultaneously. It is the size of a well plate, so you can use it in your robot, or on a lab bench, or anywhere. You’re done in under 10 seconds. That means no more trying to read a tiny droplet’s weight on a high-precision balance, and repeat for 7 more channels.
Accurate – directly measures liquid volume of your samples
The Checkit Go directly measures the volume of the liquid dispensed, not an indirect measurement of the weight or the color change of a liquid. In addition to being so quick and easy to use, the Checkit Go limits evaporation to negligible levels because the dispensed droplets are mostly encased in glass tubes within seconds. Measurements are guaranteed to be accurate to within 2% and typically better than 1%.
The Checkits can measure dispensed volumes of a spectrum of aqueous samples, including 10% solutions of DMSO, glycerol and ethanol, and other aqueous samples such as serum and plasma. This eliminates sources of error due to differences in viscosity or surface tension between your samples and concentrated dye or distilled water. Why spend $30K on equipment that could introduce errors?
Easy to Use – no training required
Just aspirate the dye that is included. Dispense the dye into the wells on the flip tab of the cartridge. Flip the tab. Or let the robot flip the tab. Then watch the dye travel up the 8 channels, simultaneously. Don’t blink or you’ll miss the fun. And compare the level of the dye against the graduations. It’s that easy!
No more trying to read a tiny droplet’s weight on a high-precision balance. No training required. No need to learn to use expensive colorimetric systems. And you can record the measurement with a simple photo.
Cost-effective – no capital investment
The Checkit Go is a fraction of the cost of unnecessary calibration or experiments gone bad due to pipetting errors. It is a low cost disposable cartridge that works on its own. It shows the measured volume directly on the cartridge. Just compare the level of dye against the graduations, without any expensive balances or spectrophotometric equipment.
Reliable and Proven
The Checkit Go provides dependable and repeatable measurements across different automated liquid handlers. It is based on the same technology as the Checkit Pro which has been used throughout the world since 2017.
Validate the accuracy of your liquid handling robots or multi-channel pipettes daily or weekly.
Quickly and easily measure the accuracy of your robot or multi-channel pipette.
Concerned that a robot or a pipette was misused or needs calibration? Just Checkit.
Download the Checkit Go brochure.
“Checkit is very easy and quick to use with excellent accuracy. Its design is modern, simple and self-explanatory.” Zhongyuan Kan, University of Pennsylvania
“I was very impressed by how easy it was to use.” Ramisa Fariha, Brown University
- Simple, user friendly operation
- Works well with robots or multi-channel pipettes
- Measure 8 channels simultaneously
- Easy to read markings indicate volumetric accuracy
- Available in several models to measure different dispense volumes
- Dye is included with each cartridge
- Minimal evaporation of dye for more accurate results
- Elegant design
- Compatible with all makes of multi-channel or electronic pipettes
- Made in the USA
Checkit Go is engineered for liquid handling robots or multi-channel pipettes. It instantly verifies the accuracy of up to 8 channels simultaneously!
Works well with robots…
…and multi-channel pipettes.
Want to evaluate single channel pipettes? Try the original Checkit Pro!
Watch this video to see how easy it is. Learn more here.
Several models are available, for dispense volumes up to 5, 10, 20, and 50 uL.
We also have a family of Checkits for singe channel pipettes.
Checkit 2 uL, box of 5$65.50 Add to cart
Checkit 5 uL, box of 5$64.40 Add to cart
Checkit 10 uL, box of 5$64.30 Add to cart
Checkit 20 uL, box of 5$63.20 Add to cart
Checkit 50 uL, box of 5$62.95 Add to cart
Checkit 100 uL, box of 5$62.75 Add to cart
Checkit 200 uL, box of 5$62.55 Add to cart
Using the Checkit – It Doesn’t Get Any Easier!
Fill tip with dye
Dispense dye into well
Flip up well tab with finger or robot
Read the level of dye
How quickly should the tabs be lifted up?
To minimize evaporation losses, lift each tab immediately after dispensing dye into its well. Lift the tab at the same moderate rate you would use to turn on a light switch.
How hard do I need to push on the tab? How far?
A light touch is all that is needed to lift the tab, until you feel it stop moving. Do not push hard, or you will risk breaking the end of the capillary. Leaving the tab up will reduce evaporation, thereby providing you more time to compare the meniscus to the adjacent markings.
Can I use my robot to lift the tab up on the Checkit Go?
Yes. You can use your robot to lift up the tab if it comes equipped with a paddle to perform this task.
How do I avoid air bubbles?
First when dispensing into the well, if you do a blowout, lift the end of the pipette tip out of the pool of dye in the well.
How do I center the dye in the well?
You can touch your pipette tip to the bottom of the well to help find the center. On the smaller volume wells, you can feel a divot at the bottom to guide the pipette tip. You can also use your pipette tip, carefully, to help guide dye to center after pipetting. If your hands are shaky, it helps to use two hands when pipetting or ask someone else for assistance.
How accurate is the Checkit?
The Checkit Pro is accurate to within 1%, aside from external influences such as evaporation. The Checkit Go is accurate to within 2%. We will likely be able to substantiate 1% accuracy once the product has enough history.
What is the cross-hatched rectangle on the Checkit Pro?
ISO 8655 standard covers the accuracy requirements of hand held, single channel, adjustable pipettes. The rectangle illustrates the acceptable range. Note that the width of the ISO rectangles does not factor in the 1% accuracy of the pipette Checkit®.
Can the Checkits be used to test someone’s pipetting technique?
Yes, one good application of the Checkits is testing the accuracy of a person’s pipetting technique.
Can the Checkits be re-used?
No, the Checkits are designed to be disposable.
Can I replace the glass capillaries?
No. To ensure accurate readings, the capillaries are precisely positioned to within .001 to .002 inches (25 to 50 micrometers). It would be near impossible to refill the Checkit with such accuracy.
In what order should I test my pipette at the high, middle, and low end of its range?
We suggest that you test the high end of the range first, then the middle, and finally the low end. For example, with a 20uL Checkit, first test it for 20 uL, then for 10 uL, and finally for 2uL.
Can I use the Checkit outdoors?
For accurate readings, the Checkit must be on a level surface, near room temperature. It will not be affected by altitude, humidity, or small changes in temperature.
Is the Checkit’s performance effected by changes in temperature?
Temperature should not have a significant effect on the Checkit between 4-40°C and its readings change less than 0.07% with a 10°C change. The evaporation effects are minimal once the droplet is in the glass capillaries in the Checkit. Thus making it more accurate than a scale. While the density of the water changes (and so the observed mass for a given volume) between 4-40°C, the glass capillaries are not subject to much thermal expansion over this range. Therefore, the volume should stay very close to accurate between these temperatures. Since the Checkit measures pipette volume with volume, there is no conversion of units like with a scale (from mg -> mL). Given the volume on the Checkit is read in the same experimental environment of your pipette, it is a more accurate reflection of how your pipette performs. This is an advantage of the Checkit over classical methods.
How do I dispose of the dye?
The dye is safe and non-toxic. It can be disposed down a sink drain.
Checkits for Single-Channel Pipettes
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