Dear Lab Guy,
I am looking for a pipettor that can be adjusted to dispense liquids in .5ml increments.
I purchased one of the Roxy M pipettors recently but I am not sure if this is really what I am looking for?
Hi Ben! Lab Guy here!
A repeating pipettor is the just the tool you need to accurately and consistently dispense .5 ml or another predetermined amount over and over.
Roxy offers a number of different size tips and when combined with a setting of the Adjusting wheel on the pipettor, you have many different volume options. Choice can be daunting, but I assure you that you will quickly get the hang of the system, and the Roxy M will reliably serve you for many years to come!
First: You can find the Roxy M (F37310-0000) and the instructions on our website HERE. This will give you a good product overview and dispensing tips in addition to how to set the pipettor for different dispensing amounts.
Second: We’ll now focus on setting the pipettor to your desired 0.5ml amount. The instructions list volumes in micro-liters (not milli-liters), and we know that your amount of 0.5ml = 500µl. In Table #1 on the first page of the instructions (and at right) you can see that 500µl is listed in three places.
Reading the chart it shows you have 3 choices of tips to use with your Roxy.
5.0ml - (F37300-0004)
12.5ml - (F37300-0005)
25.0ml - (F37300-0008)
These can all be found HERE:
Third: At the top of your Roxy Pipettor you will find the Adjusting Wheel (pictured here with the arrow) The wheel has 5 different settings each indicated by a number on the top of the wheel.
If you use the 5ml tips, you will set your “Adjusting Wheel” to ‘5’
If you use the 12.5ml tips, you will set your “Adjusting Wheel” to ‘2’
If you use the 25ml tips, you will set your “Adjusting Wheel” to ‘1’
The bottom line of Table 1, “STEPS” tells you about how many
500µl dispenses you can get for each combination.
So there you have it, Ben. You made a fine choice for your liquid dispensing needs.
Thanks for writing to Lab Guy, and please feel free to write back if I can help in any other way…