The Vibra HT 220 will eat the FX120 for lunch. I've had one for about 15 years or so I suppose. It's just a whole different level. Me and a couple of my shooting buddies each have one.
First point of note is the
Vibra HT 220 goes to 3 decimal places in grains. It increments every 0.002 grains. Now you might think that to be excessive, but it's not. The standard of inspection is to use a measuring device that is ten times more precise that the error tolerance you hope to maintain... For this reason this scale is just right.
Any accurate scale will drift as a bi product of sensitivity, but when this one does, it drifts 0.004 grains., about a fifth of a kernel of Varget.
It also has internal calibration that automatically calibrates every time on start up.
As for the load sensing system.... There are 3 methods of sensing load change and the first two (Load cell and magnetic force reconstruction) are sensitive to warm up, voltage fluctuations and nearby electronics and radio signals such as a cordless phone. Load cell and magnetic force reconstruction scales operate best when connected to a voltage stabilized power source such as a battery back up for your PC.
The Vibra uses an entirely different method of sensing weight... As the name suggests... it uses vibration. Internally they have a tuning fork and the pitch changes as the weight changes. For this reason, it does not require a warm up and is not affected power fluctuations or cordless phones.
As long as the air pressure in the room is not changing, the Vibra HT 220 rarely drifts. So when I'm using it, I close the windows, make sure the wife is not running the dryer, and I stop if the gas water heater comes on.
There might be something better out there, but I've never found it.
https://www.tequipment.net/Intellig...MI6Z_wptv88wIVjLbICh3eTQ6SEAYYASABEgIAYPD_BwE