Looks like you’ve got a regular beat there, so I’d start by ruling out the sensor first. Check the last calibration log and see if any drift has been noted in that interval. Compare the spike with other diagnostics – temperature, pressure, any mechanical vibrations that might be hitting the detector. If the pattern shows up across multiple channels, it’s probably a real fluctuation. If it’s isolated to that sensor, a drift or a glitch is more likely. Either way, keep a running log and set a threshold so you can catch any deviation before it turns into a big issue.