@Pette Pro hands-on: from power-on to dispensing

This electric pipette isn't hard to get started with; you can go through a full workflow in half an hour. But if you treat it as just a more effortless ordinary pipette, you're only using 30% of its value.

I previously wrote a piece on the @Pette Hub numbers, and at that time I also got hands-on with its sibling @Pette Mini. This time a client lab lent me a @Pette Pro, and I spent most of a day there, from power-on to completing a full reagent dispensing run. Below I'll write it in order for someone who has never touched one.

First, let's clarify a few terms. A pipette is a tool in the lab for precisely aspirating and transferring small amounts of liquid; it looks like a slightly thicker pen. A tip is a disposable plastic cone that fits on the pipette tip; the liquid actually goes into the tip and doesn't touch the body. μL is microliter; one milliliter equals one thousand microliters. The single-channel @Pette Pro has a range of 0.5 to 1000 microliters. Tip ejection means popping off the used tip.

You don't need much preparation: the body, a box of tips matching the range, and a charging cable. If you want to adjust parameters with your phone, install their mini-program too. Charge first—the screen lighting up means it's powered. The demo unit I got was dead; I plugged it in and waited about ten minutes. Long-press the power button to enter the main interface. On first boot it prompts a self-check; just follow along. Then check the calibration status in settings. Since it's not your own device, don't skip this step. Finally, take a tip and press it vertically onto the tip cone; a "click" means it's seated. The official applicable scenarios include qPCR, cell experiments, sample preparation, reagent dispensing, liquid dilution, and mixing. Beginners should practice with dilution first—low cost.

Getting started isn't complicated either. Attach the tip, select pipetting mode on the screen, and start with the most basic single aspiration/dispense. The screen shows the current range, say 200 μL. There are two ways to adjust parameters: directly add/subtract on the touchscreen, or open the mini-program, connect via Bluetooth, set it on the phone, and send it down. I prefer the latter; protocols can be saved and recalled next time. When aspirating, insert the tip vertically about two to three millimeters below the liquid surface, press the aspirate button, and release slowly; there's progress on the screen. Move to the target well and press the dispense button to dispense. Press the eject button and the tip pops out by itself; your hand doesn't need to touch it. For the first time, I suggest running through it twice with water, not going straight to reagents.

Among the pitfalls, range is the easiest to stumble on. 0.5 to 1000 microliters sounds like wide coverage, but precision at small and large volumes is not the same order of magnitude. At first I set 2 microliters to save effort, and the readings fluctuated badly; switching to a small-range tip made it stable. Use a low-range configuration for low volumes; don't force it.

Another is not pressing the tip on tightly. It looks attached, but it's actually a bit off; during aspiration it leaks air, and the final dispensed volume is low. The way to tell is simple: after aspirating, hold the tip upward for two seconds. If bubbles appear in the tip or the liquid level drops, it wasn't seated.

Tip ejection is also easy to get wrong. This unit's ejection is electric; press once and the tip pops out automatically. You don't need to push hard with your thumb like a manual pipette. At first I habitually reached to pull it off and was stopped by the technician on the client side. Electric ejection saves effort and also avoids your hand touching the tip and contaminating the sample.

I tried Bluetooth pairing twice the first time. The key is that the device must be powered on for the mini-program to find it. Once connected, parameters send down quickly.

After using it, my judgment is that competition for this kind of device has already shifted from "accurate or not" to "does it remember." Manual pipette precision has long been sufficient; what creates the gap is operation logs, calibration records, and whether data can be exported. Labs need to pass audits and do traceability; these are hard requirements.

Dimension	Manual pipette	@Pette Pro
Parameter setting	Knobs and feel	Touchscreen settings, protocols can be saved
Tip ejection	Thumb push, hand sore after a day	Electric ejection, one-button pop-out
Records	Basically handwritten	Operation logs and calibration records exportable
External control	None	Bluetooth to mini-program or preparation kit

My prediction is that in the next two to three years, pipettes will become data nodes in the lab, connected to equipment management systems. Who used which pipette when and processed which batch of samples can be checked directly in the backend. Right now it still looks like a bonus; soon it will become standard. When purchasing, you need to see whether it leaves this opening.

Next step: don't rush into multichannel. Save the single-channel protocol, run it for one or two weeks, and see whether there are abnormal fluctuations in the operation logs. Once the workflow is stable, then consider connecting a preparation kit for automation—that's where this thing truly saves time.