Pipette Supplier in Bangladesh - Ohaus, USA - Jadu Bazar

Ohaus Pipette (20 – 200 µL)

Brand Ohaus
Model AO-200
Origin USA
Warranty 12 Months
SKU: A00A289 Category:


We are Ohaus Pipette Supplier in Bangladesh. Aside from sending your pipette off for calibration every year, your pipettes should be checked for accuracy on a regular basis. How often you do it depends on the frequency you use them.

The Across Pro family of pipettes incorporates multiple features that bring comfort and efficiency to the repetitive but essential liquid handling process. OHAUS’ newest generation of adjustable, single channel precision pipettes includes eight models that can hold volumes ranging from 0.2 μL to 10 mL and support every application in which precise measurement of liquids is a main priority.

Applications Pipetting
Display 3-digit micrometer
Operation N/A
Communication N/A. Pipette Supplier in Bangladesh
Construction PVDF housing, stainless steel piston, ergonomic finger hook
Design Features Highly chemical and shock resistant, low thermal conductivity, light plunger force, low-drag seals

Pipette Supplier in Bangladesh

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You Check Accuracy of Pipette Supplier in Bangladesh

Aside from sending your pipette off for calibration every year, your pipettes should be checked for accuracy on a regular basis. How often you do it depends on the frequency you use them.

The faithful pipette you use every day? Check it every three months.

The beloved but not used so often pipette? An annual check should suffice.

Accuracy of Pipette: The Weight of Water

The most common way to check your pipette accuracy is by weighing water.

The density of water is 1 g / mL. This means that every microliter (µL) should weigh exactly 0.001 g using a high-precision balance. In other words, if your pipette is accurate, the amount of water you dispense will equal the amount the water weighs. So, if your pipette is set to 100 µL, then the scale should read 0.1 g.

Before we dive into the process of measuring the accuracy of your pipettes, there are some things you need to know that can impact accuracy (and therefore, also impact how you measure accuracy).

Pipette Supplier in BangladeshHow Temperature and Pressure Affect Pipetting

Temperature and air pressure can affect the density of liquids, which you should consider when checking your pipettes. Pure water has a density of 1 g/mL at 20°C and 1 atmosphere of pressure, so ideally, measure the accuracy of your pipettes under these conditions.

Notice I said pure water? If you use tap water, which contains dissolved ions the density may vary. Is this enough to impact your results? There’s no need to risk it—just use distilled water.

The effect of pressure is negligible, and therefore, variations in this are unlikely to alter your results dramatically. However, the ambient temperature can have more of an effect, with higher temperatures resulting in lower density because of thermal expansion.

Luckily, there are ways to adjust for this, so ensure you measure the ambient temperature when measuring the accuracy of your pipette.

Read our article on Performing Pipette Calibration to find out how to compensate for temperature differences when pipetting.

Note that you also need to make sure you are using a balance that has been properly calibrated too.

How Pipetting Technique Affects Accuracy

Before you check the accuracy of your pipette, you need to ensure you are using the proper pipetting technique. If not, you’ll be measuring the inaccuracy of your pipetting skills, rather than the pipette.

Proper technique involves drawing up (aspirating) and dispensing (ejecting) the liquid in a smooth motion. Putting the pipette tip in the water and quickly releasing the plunger will give you inaccurate results—even if your pipette is properly calibrated.

In fact, using the proper pipetting technique will not only increase the robustness (and reproducibility) of your results but will also decrease the wear and tear on your pipette. A win-win!

7 Steps to Checking Your Pipette’s Accuracy

Now that you’ve read the background, here’s how to check the accuracy of your pipette in 7 easy steps. This works whether you are using a positive displacement pipette or an air displacement pipette. And. But. So so. And. But. So so

  1. Get some ddH2O ready that has been at room temperature a while, along with your pipette.
  2. Place a weigh boat on the microbalance (or analytical balance). Make sure to close the doors and then zero the balance.
  3. Set your pipette to the desired volume within the pipette’s range. And. But. So so. And. But. So so
  4. It’s a good idea to “prime” the pipette tip a few times by pipetting up and down with water before you take your first measurement.
  5. When everything is ready, aspirate (suck up) the water into the tip again and eject it slowly into the weight boat. Then, shut the door and record the weight.
  6. Zero the balance, repeat steps 3–5 around 10 times, and average your findings.
  7. Do this for each volume you want to check. Accuracy is often lost at the end of the pipette’s range, so it’s a good idea to test both the minimum and maximum your pipette is designed to do, along with 50% of the maximum volume. And. But. So so. And. But. So so
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Additional information


: Ohaus




: AO-200

Volume Range

: 20 µL ; 200 µL


: 20 µL;100 µL;200 µL

Accuracy ±

: 2.5 % ; 0.5 µL ; 0.8 % ; 0.8 µL ; 0.8 % ; 1.6 µL

Precision ±

: 1 % ; 0.2 µL ; 0.25 % ; 0.25 µL ; 0.15 % ; 0.3 µL

Auto Cleavability

: Half

Increment (manual)

: 0.2 µL

Width (Shipping)

: 13.5 cm

Height (Shipping)

: 6.5 cm

Length (Shipping)

: 29.5 cm

Gross Weight (Shipping)

: 0.3 kg

Terms and Conditions

Cash on Delivery

Jadu Bazar is a online shopping store in Bangladesh. We sell meny product on cash on delivery. Cash on delivery is a payment collection method that requires customers to pay for the product upon delivery. That means, If you order a product from Jadu Bazar, you can pay cash for your order when the product you will received from our delivery team. But delivery cost must be paid in advance (Bkash, Nagad, Rocket) then we will send your product.

Due to the current unstable market conditions, to be sure about the stock and price and order online, call: 01919-910640

Delivery Policy

After complete a order and delivery cost paid, Jadu Bazar tries to deliver all the goods to our valuable customer

If your delivery address is within Dhaka city, products will be delivered by within 1 business days. If it is outside Dhaka then it will take 2-3 business days.

Our Business Day: Saturday to Thursday / 09 am – 09 pm. Except public holidays.

Return Policy

Instant return if goods have solid problem.

We provide great customer experience each time you shop with your Jadu Bazar. If you are not satisfied with your purchase, we ensure ‘Replacement Guarantee’. We will replace your purchased product if the product has any defect by its manufacturer or if the product is not the same one you ordered.

All you need to do is give us a call or drop an email at admin@jadubazar.com within a period of 24 Hours from the date of delivery. However, please return the product with the tags intact and in their original packaging, in an unwashed and undamaged condition. Replacement for products is subject to inspection and checking by Jadu Bazar team. Replacement cannot be possible if the product is burnt, damaged by short circuit, or broken by customer.


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