What things should you look for when you evaluate a pump?
Look at the price last! I have seen pumps that are either really really old or in shocking condition, with near new price tags. Often if you keep your eye on the auctions you will see the items relisted over and over, often at the same ridiculous price. Some come down eventually. I would suggest don’t buy then either – it seems to speak volumes about the seller. I haven’t bought a second hand pump at near new prices yet – but I have communicated with the sellers on the auction – my opinion is steer clear. You’re not getting any warranty if you purchase so pay less rather than too much.
Take a long look at the photos above
You can click your mouse on the images, click and they will enlarge.
All of these pictured pumps have obvious problems,
General filthy condition
Doesn’t suggest the owner took much care. Cleaning and maintenance were not done – so this sort of pump will have considerable wear. Will likely be a staller or was worked to near death and is now being sold off. Stay away!
Extreme Wear – by Humans
Some of the photos above show mechanical wear and poor condition in the drive mechanism – dirty color is a clue and others show human wear – broken buttons and all the paint missing from the case immediately under the front panel buttons. Broken buttons and paint wear tend to show a lot of use by humans and they wont be SyringePumpPro owners – I bet. Imagine the hours it takes to wear through paint and break off buttons tops – could be a sign of a bored operator and bored operators might not have been caring for the pump…
In the photo on the left – can you see the missing Program/Phase # button? This is an easy repair – if you can get the spare part.
These buttons are all on a rubber membrane, so you cant (well easily) replace a single button – you have to replace the entire membrane of all buttons. This is actually not hard to do, taking only minutes of your time.
The risk of your repair not working is quite low. BUT where do you get another membrane? You should also know that the membrane doesn’t seem to have changed for years and is the same between models – even peristaltic / syringe pump membranes would seem to be interchangeable.
LCD Segments that don’t work
This problem is limited to the LCD display which needs changing. But you will be de-soldering and soldering. Not a lot of folk are comfortable soldering. You might have access to someone else who can solder. But to gain a new LCD display you would need to buy another pump. Why not just buy the other pump and be done with it? Don’t over look the fact that if you get the pump cheap enough – you could buy a license for SyringePumpPro and simply use your computer to operate the pump – the LCD display can be ignored!
Missing LCD displays
Chemyx pump with missing lcd display
You know how this happened don’t you? Read the paragraph above if you don’t. From this photo you have no idea what other parts are missing. Leave that pump in the shop.