We just got a robotic machine that puts tiny amounts of liquid into tiny tubes, which I realise doesn’t sound amazing but it means it does a lot of the less interesting work for me and makes it faster!
Mine would have to be our prep HPLC! It allows us to purify any molecule that we’ve made, relatively easily… (which believe me, can be a massive pain when you are a synthetic chemist!). Scientists normally love pieces of equipment that make their jobs easier, and mean we have to do less of the less exciting or unsuccessful things!! 🙂