Sensor Data Analyzer
Upload a CSV, then see the mean, standard deviation, trend and outliers, filter the data and export the cleaned result. The file never leaves your browser.
Free, no account needed. Everything runs in your browser; nothing you enter is sent to a server.
Data
Separate values with new lines, spaces or semicolons. Use a point for decimals.
Up to 5 MB. The file never leaves your browser.
Filters
Unit: standard deviations (σ). The z-score uses the mean and σ of every loaded value. With n values a z-score can never exceed √(n−1), so short series cannot reach high thresholds.
A value that looks like an outlier can be a real process event. Check the sensor, unit and time before removing it.
No data yet. Choose a sample, type some values or upload a CSV.
Series chart
- Kept values
- Removed values
- Mean of kept values
Statistics (kept values)
Trend: the slope of the least-squares line. “Flat” means the fitted change across the series is under 2% of the mean.
Data quality and export
Values
| Sample | Value | z-score | Status |
|---|
How to use it
- Load your data. Upload a CSV or load the sample, then choose the column that holds the numeric value.
- Set the filters. Optionally apply a sigma-based outlier filter or a minimum threshold.
- Export the result. Download the clean values, or every row with its z-score and status, as CSV.
Common questions
Which file format does it accept?
CSV files with a numeric column. You choose the index of the data column (starting at 0).
Does my file leave my browser?
No. The file is processed in your browser and is not sent to a server.
How are outliers found?
The tool calculates how many standard deviations each value lies from the mean (z-score) and flags values beyond the sigma threshold you choose.
Is it right to remove outliers?
Not always. A spike can be a real process event. Check the sensor, the unit and the timestamp before removing it.
Planning an IT/OT project?
Describe your machine, data flow or production goal in a few sentences and the ASP Dijital team will reply by email.