Ser for øvrig ut som den Velp Scientifica-røreren er noe skikkelig drit basert på reviews andre steder.
http://www.coleparmer.com/Product/L...rer_120_240_VAC/EW-86579-10?productId=8657910
It's great for mixing small volume solution and looked neat on the bench. However, it stopped working within a year with light usage.
BOTTOM LINE No, I would not recommend this to a friend
Works intermittently and then stops completely after 15 minutes.
BOTTOM LINE No, I would not recommend this to a friend
I bought 10 of those for a batch study for 3 days. They works well at certain speed (mostly inaccurate within 100 rpm range). But you can not use the marker or dial to set consistent speed for each of the stirrer. With time, speed also varies. Not good for long term experiment where accuracy is warranted. Good for mixing without accuracy. Very cheap, but performance-wise it is not worth to have.
BOTTOM LINE No, I would not recommend this to a friend
low quality - would only buy brand name stirrer
BOTTOM LINE No, I would not recommend this to a friend
The main drawback to using this stirr plate is the inaccurate knob setting for the desired rpm's. Without any indentations to tell you a range of speed, it is tough to be very precise in your estimate. However, this is not a top of the line sirrer thus one has to pass his judgement with caution given its dependability and reasonable cost.
BOTTOM LINE Yes, I would recommend this to a friend