Verification on the spot
Why take chances with your sample analysis?
Evaluate the accuracy of your pipettes in seconds with our convenient Pipette Checkit™ cartridges. Low-cost, fast, and easy to use, the Checkit can save money on calibration services while giving you the confidence that your pipettes are delivering accurate volumes. No more trying to read a tiny droplet’s weight on a high-precision balance.
Whenever you need a fast, quantitative assessment of a pipette’s accuracy, just pull out a Checkit. Available for various size pipettes, the Checkit checks your pipette’s accuracy at the bottom, middle and top of its range. Wouldn’t it be nice to know whether a pipette needs recalibration, or if lab personnel could use a brush-up on their pipetting technique? With the Checkit, a clear answer is seconds away.
Many pipette manufacturers recommend regular in-laboratory checking of pipettes in addition to good maintenance and scheduled calibration. The Checkit provides a valuable early-warning system for a pipette that may be drifting out of calibration.
Confidence in your experiments
No worrying! Do your experiments with confidence, knowing that your pipettes are delivering accurate volumes.
Instant, easy verification, anywhere
No waiting! Evaluate pipette accuracy on the spot in just seconds – no matter where you are. Why mess with a scale?
Checkit is fast and easy. And no worries about evaporation or air currents. Your measured drop is encased in a glass tube within seconds, so the values won’t change while you’re trying to read them.
No more precautionary calibration
No unnecessary downtime while your pipettes are out for calibration. And no wasted calibration fees. Use the Checkit and instantly know what needs to be done.
Instant checks anytime
Keep Checkits in the lab for instant confirmation of pipette accuracy. Especially useful if your pipette has been dropped, cleaned, or borrowed. Don’t take a chance when you’re setting up an experiment with precious samples or expensive reagents.
Confirm accuracy between calibrations
Perform checks regularly to watch for performance drift between calibrations. A worn or damaged pipette can drift out of calibration quickly – get early warning before there’s a problem.
Train students and technicians
Good pipetting technique is an important part of laboratory success. Use the Checkit as a training tool to verify proper technique. The Checkit requires no special training and is easy to use even for novice lab members.
See the Pipette Checkit brochure.
- Easy, user friendly operation
- Easy to read markings indicate volumetric accuracy
- ISO 8655 calibration standards indication
- Elegant design
- Minimal evaporation
- Made in the USA
|Pipette size||Checkit™ model||Measured volumes (µL)|
Checkit 10 uL, box of 5$130.20 Add to cart
Checkit 100 uL, box of 5, coming July 2017$130.50 Read more
Checkit 2 uL, box of 5$130.02 Add to cart
Checkit 20 uL, box of 5$130.30 Add to cart
Checkit 200 uL, box of 5, coming July 2017$130.60 Read more
Checkit 5 uL, box of 5$130.10 Add to cart
Checkit 50 uL, box of 5, coming July 2017$130.40 Read more
Using the Checkit
Each Pipette Checkit™ has three precision glass capillaries matched to the top, middle, and low end of the range of your pipette. Pipet the three diagnostic volumes into the matching sample wells, flip the wells into measurement position, and take your readings. The pipetted volumes are compared to easy-to-read graduations that tell you instantly whether the pipette needs adjustment. Watch our user guide video.
Calibration vs. verification
The Pipette Checkit™ is a tool to identify potential volume delivery errors for pipettes. It is not a calibration tool. If your institution requires pipette calibration on a specific schedule, you should adhere to this schedule and use the Checkit as an extra verification step between scheduled calibrations.
Expected performance at different volumes
Piston pipettes are most accurate at or near their nominal volume (the maximum volume the pipette can deliver). When a pipette is used near the bottom of its range, the measured volumes will vary more, and are also more strongly affected by slight variations in pipetting style or environmental factors like humidity. The markings on the Checkit reflect this variation.
A note on environment: One advantage of the Checkit is that it can be used in the same room in which the experiment will be conducted. This can help identify variation in delivered volume due to pressure, humidity, or temperature differences between the calibration environment and the experimental environment. Because the Checkit directly measures delivered volume rather than relying on gravimetric analysis, there is also no need to use correction calculations that account for these factors.
Accuracy and precision
Most pipette manufacturers provide specifications for both the accuracy and precision of their pipettes. Briefly, accuracy describes how close the mean of delivered volumes is to the stated volume, and precision describes the distribution of the volumes around the mean. If you choose to compare your Checkit readings to the manufacturer’s specifications, remember to account for both accuracy and precision when determining what range is acceptable.
Note that ISO 8655 standards differ from the manufacturer’s standards. If your pipette has been recalibrated since purchase, you should check with your calibration service to determine which standards were used, and consider comparing your Checkit readings to that standard rather than to the manufacturer’s standard.
Useful links and resources