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The dataset generation failed
Error code:   DatasetGenerationError
Exception:    ArrowInvalid
Message:      Failed to parse string: 'overheating' as a scalar of type double
Traceback:    Traceback (most recent call last):
                File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1848, in _prepare_split_single
                  writer.write_table(table)
                  ~~~~~~~~~~~~~~~~~~^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/arrow_writer.py", line 784, in write_table
                  self._write_table(pa_table, writer_batch_size=writer_batch_size)
                  ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/arrow_writer.py", line 795, in _write_table
                  pa_table = table_cast(pa_table, self._schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2378, in table_cast
                  return cast_table_to_schema(table, schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2312, in cast_table_to_schema
                  cast_array_to_feature(
                  ~~~~~~~~~~~~~~~~~~~~~^
                      table[name] if name in table_column_names else pa.array([None] * len(table), type=schema.field(name).type),
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                      feature,
                      ^^^^^^^^
                  )
                  ^
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 1861, in wrapper
                  return pa.chunked_array([func(chunk, *args, **kwargs) for chunk in array.chunks])
                                           ~~~~^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2152, in cast_array_to_feature
                  return array_cast(
                      array,
                  ...<2 lines>...
                      allow_decimal_to_str=allow_decimal_to_str,
                  )
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 1863, in wrapper
                  return func(array, *args, **kwargs)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2015, in array_cast
                  return array.cast(pa_type)
                         ~~~~~~~~~~^^^^^^^^^
                File "pyarrow/array.pxi", line 1186, in pyarrow.lib.Array.cast
                File "/usr/local/lib/python3.14/site-packages/pyarrow/compute.py", line 414, in cast
                  return call_function("cast", [arr], options, memory_pool)
                File "pyarrow/_compute.pyx", line 604, in pyarrow._compute.call_function
                File "pyarrow/_compute.pyx", line 399, in pyarrow._compute.Function.call
                  result = GetResultValue(
                File "pyarrow/error.pxi", line 155, in pyarrow.lib.pyarrow_internal_check_status
                  return check_status(status)
                File "pyarrow/error.pxi", line 92, in pyarrow.lib.check_status
                  raise convert_status(status)
              pyarrow.lib.ArrowInvalid: Failed to parse string: 'overheating' as a scalar of type double
              
              The above exception was the direct cause of the following exception:
              
              Traceback (most recent call last):
                File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 1369, in compute_config_parquet_and_info_response
                  parquet_operations, partial, estimated_dataset_info = stream_convert_to_parquet(
                                                                        ~~~~~~~~~~~~~~~~~~~~~~~~~^
                      builder, max_dataset_size_bytes=max_dataset_size_bytes
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                  )
                  ^
                File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 948, in stream_convert_to_parquet
                  builder._prepare_split(split_generator=splits_generators[split], file_format="parquet")
                  ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1694, in _prepare_split
                  for job_id, done, content in self._prepare_split_single(
                                               ~~~~~~~~~~~~~~~~~~~~~~~~~~^
                      gen_kwargs=gen_kwargs, job_id=job_id, **_prepare_split_args
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                  ):
                  ^
                File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1879, in _prepare_split_single
                  raise DatasetGenerationError("An error occurred while generating the dataset") from e
              datasets.exceptions.DatasetGenerationError: An error occurred while generating the dataset

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machine_id
string
timestamp
string
vibration_rms_mm_s
float64
bearing_temp_c
float64
motor_current_a
float64
pressure_bar
float64
rpm
float64
oil_particles_per_ml
float64
ambient_temp_c
float64
load_pct
float64
rul_hours
null
fail_within_72h
int64
developing_fault
null
M0000
2025-01-01 00:00:00
1.265
53.84
10.09
0.322
3,543
25.2
12.8
93
null
0
null
M0000
2025-01-01 01:00:00
1.275
54.88
10.73
0.317
3,553
30.6
11.4
102.5
null
0
null
M0000
2025-01-01 02:00:00
1.283
53.01
9.9
0.308
3,529
28.8
8.9
80.2
null
0
null
M0000
2025-01-01 03:00:00
1.326
52.51
9.53
0.3
3,532
26.1
11.9
83.2
null
0
null
M0000
2025-01-01 04:00:00
1.286
49.83
8.7
0.312
3,522
24.8
10.1
74
null
0
null
M0000
2025-01-01 05:00:00
1.26
50.19
9.45
0.297
3,527
21.8
10.8
78.4
null
0
null
M0000
2025-01-01 06:00:00
1.243
52.11
9.01
0.282
3,529
30
10.6
80.6
null
0
null
M0000
2025-01-01 07:00:00
1.201
49.63
9.13
0.284
3,513
25.8
10.5
65
null
0
null
M0000
2025-01-01 08:00:00
1.223
49.81
9.02
0.276
3,509
21.4
10.7
61.3
null
0
null
M0000
2025-01-01 09:00:00
1.025
44.76
7.17
0.251
3,480
24.2
9.4
34.4
null
0
null
M0000
2025-01-01 10:00:00
1.134
47.29
7.43
0.253
3,490
30.7
10.8
43.9
null
0
null
M0000
2025-01-01 11:00:00
0.944
46.79
6.34
0.242
3,475
24.6
11.9
29.7
null
0
null
M0000
2025-01-01 12:00:00
1.089
48.33
7.29
0.263
3,494
22.7
8.9
47
null
0
null
M0000
2025-01-01 13:00:00
1.106
44.7
8.02
0.229
3,483
25.4
8.9
37.5
null
0
null
M0000
2025-01-01 14:00:00
1.054
47.75
6.74
0.248
3,484
27.1
11
37.7
null
0
null
M0000
2025-01-01 15:00:00
1.099
45.35
6.74
0.225
3,477
23.6
10.6
31.4
null
0
null
M0000
2025-01-01 16:00:00
1.002
45.2
7
0.28
3,486
26.1
10.9
40.4
null
0
null
M0000
2025-01-01 17:00:00
1.196
48.99
8.17
0.273
3,493
22.6
13
46
null
0
null
M0000
2025-01-01 18:00:00
1.156
47.9
7.91
0.281
3,491
27.4
10.2
44.6
null
0
null
M0000
2025-01-01 19:00:00
1.114
47.98
8.26
0.232
3,498
29.6
9.2
50.9
null
0
null
M0000
2025-01-01 20:00:00
1.153
50.09
8.39
0.28
3,509
25.7
8.7
61.7
null
0
null
M0000
2025-01-01 21:00:00
1.266
50.59
8.75
0.264
3,513
24.4
11.3
65.5
null
0
null
M0000
2025-01-01 22:00:00
1.181
50.9
8.52
0.301
3,521
26.2
8.7
72.5
null
0
null
M0000
2025-01-01 23:00:00
1.256
50.86
9.28
0.312
3,529
28.3
10.6
80.7
null
0
null
M0000
2025-01-02 00:00:00
1.273
52.65
10.79
0.321
3,530
27.6
11.7
81.4
null
0
null
M0000
2025-01-02 01:00:00
1.47
51.99
11.22
0.35
3,545
26.8
9.2
95.7
null
0
null
M0000
2025-01-02 02:00:00
1.221
53.07
10.26
0.311
3,526
28.1
11.5
77.1
null
0
null
M0000
2025-01-02 03:00:00
1.408
57.09
11.05
0.341
3,544
25.1
11.1
94.8
null
0
null
M0000
2025-01-02 04:00:00
1.228
51.19
9.9
0.308
3,528
26.4
11.9
79.5
null
0
null
M0000
2025-01-02 05:00:00
1.27
53.39
9.09
0.281
3,523
33.8
12.2
74.9
null
0
null
M0000
2025-01-02 06:00:00
1.289
50.3
9.03
0.264
3,509
17.2
10.2
61.8
null
0
null
M0000
2025-01-02 07:00:00
1.171
49.9
8.97
0.265
3,512
24.6
9.2
64
null
0
null
M0000
2025-01-02 08:00:00
1.186
48.07
9.18
0.289
3,502
25.6
11.7
55.4
null
0
null
M0000
2025-01-02 09:00:00
1.177
48.03
8.5
0.265
3,498
31.9
10.6
51.2
null
0
null
M0000
2025-01-02 10:00:00
1.034
45.77
7
0.284
3,484
25.9
9.8
38.5
null
0
null
M0000
2025-01-02 11:00:00
1.073
46.88
7.67
0.277
3,484
23.5
10.4
37.7
null
0
null
M0000
2025-01-02 12:00:00
1.187
47.51
8.21
0.27
3,494
24.7
11.5
47.3
null
0
null
M0000
2025-01-02 13:00:00
1.132
46.2
7.33
0.268
3,479
23.1
10.3
33.7
null
0
null
M0000
2025-01-02 14:00:00
0.988
45.15
6.83
0.246
3,471
21.4
11.4
25.5
null
0
null
M0000
2025-01-02 15:00:00
1.176
47.31
7.46
0.279
3,486
22.4
12.7
39.4
null
0
null
M0000
2025-01-02 16:00:00
1.048
45.62
6.8
0.229
3,480
26.4
10.7
34.4
null
0
null
M0000
2025-01-02 17:00:00
1.193
49.61
7.74
0.252
3,492
24.9
10.3
45.5
null
0
null
M0000
2025-01-02 18:00:00
1.138
47.29
8.19
0.286
3,499
28.5
10.8
52.3
null
0
null
M0000
2025-01-02 19:00:00
1.11
47.64
8.41
0.257
3,499
24.8
7.3
51.7
null
0
null
M0000
2025-01-02 20:00:00
1.218
48.51
7.65
0.271
3,494
29.6
12.6
47.2
null
0
null
M0000
2025-01-02 21:00:00
1.229
50.61
8.99
0.294
3,515
22.7
10.8
67.5
null
0
null
M0000
2025-01-02 22:00:00
1.298
52.68
9.23
0.317
3,530
23.2
12.1
81.7
null
0
null
M0000
2025-01-02 23:00:00
1.32
52.9
9.76
0.298
3,529
26.9
10.8
80
null
0
null
M0000
2025-01-03 00:00:00
1.384
53.63
10.45
0.325
3,540
31
9.5
90.7
null
0
null
M0000
2025-01-03 01:00:00
1.336
55.25
10.82
0.324
3,547
27.3
10.2
97.4
null
0
null
M0000
2025-01-03 02:00:00
1.278
51.38
9.9
0.319
3,535
22.3
11.7
85.5
null
0
null
M0000
2025-01-03 03:00:00
1.366
53.47
10.82
0.35
3,548
32.2
10.7
98
null
0
null
M0000
2025-01-03 04:00:00
1.394
54.65
10.4
0.326
3,547
24.3
10.3
97.5
null
0
null
M0000
2025-01-03 05:00:00
1.363
55.25
10.81
0.309
3,537
26.9
11.4
87.9
null
0
null
M0000
2025-01-03 06:00:00
1.282
52.61
9.51
0.316
3,531
21.4
10.1
82
null
0
null
M0000
2025-01-03 07:00:00
1.227
52.6
9.96
0.271
3,522
26.7
11.2
73.9
null
0
null
M0000
2025-01-03 08:00:00
1.336
54.06
10.26
0.329
3,524
24.6
10.1
75.4
null
0
null
M0000
2025-01-03 09:00:00
1.118
49.23
7.86
0.252
3,498
30.9
13.3
51.2
null
0
null
M0000
2025-01-03 10:00:00
1.173
45.79
8.04
0.296
3,489
26.1
9.6
42.8
null
0
null
M0000
2025-01-03 11:00:00
1.092
47.29
7.7
0.247
3,488
23.9
9.9
41.8
null
0
null
M0000
2025-01-03 12:00:00
1.045
46.66
6.68
0.268
3,471
23.6
11.1
25.5
null
0
null
M0000
2025-01-03 13:00:00
1.071
43.57
6.1
0.247
3,463
24.8
10.4
18
null
0
null
M0000
2025-01-03 14:00:00
1.148
46.47
6.2
0.236
3,468
21
10.5
23.1
null
0
null
M0000
2025-01-03 15:00:00
1.09
46.47
6.63
0.241
3,481
25.8
11.2
34.8
null
0
null
M0000
2025-01-03 16:00:00
1.068
47.04
7.03
0.273
3,485
29.4
9.8
39.2
null
0
null
M0000
2025-01-03 17:00:00
0.996
46.23
6.82
0.241
3,474
26.8
10.9
28.5
null
0
null
M0000
2025-01-03 18:00:00
1.009
47.91
7.48
0.27
3,478
18.7
13
32.3
null
0
null
M0000
2025-01-03 19:00:00
1.255
48.85
8.61
0.278
3,499
28.9
10.5
52.3
null
0
null
M0000
2025-01-03 20:00:00
1.249
49.37
8.72
0.292
3,509
27.1
9.6
61.2
null
0
null
M0000
2025-01-03 21:00:00
1.279
51.21
9.19
0.314
3,518
26.4
10.5
69.9
null
0
null
M0000
2025-01-03 22:00:00
1.29
50.41
9.84
0.302
3,531
26.7
8.7
82.6
null
0
null
M0000
2025-01-03 23:00:00
1.401
55.57
11.27
0.303
3,542
27.5
11.3
92.8
null
0
null
M0000
2025-01-04 00:00:00
1.364
51.85
10.39
0.291
3,538
29.4
9.7
89.1
null
0
null
M0000
2025-01-04 01:00:00
1.416
53.72
10.7
0.343
3,544
24.2
9.1
94.5
null
0
null
M0000
2025-01-04 02:00:00
1.272
50.69
9.74
0.311
3,530
24.8
8.4
81.1
null
0
null
M0000
2025-01-04 03:00:00
1.318
51.87
8.92
0.282
3,527
21.7
10.9
78.8
null
0
null
M0000
2025-01-04 04:00:00
1.377
54.27
10.24
0.327
3,536
24.2
10.4
86.4
null
0
null
M0000
2025-01-04 05:00:00
1.298
51.5
10.3
0.306
3,534
24.5
10.2
84.6
null
0
null
M0000
2025-01-04 06:00:00
1.295
55.51
9.66
0.294
3,527
31.5
12
78.4
null
0
null
M0000
2025-01-04 07:00:00
1.176
52.68
8.89
0.305
3,518
26.5
10.3
69.9
null
0
null
M0000
2025-01-04 08:00:00
1.271
51.98
8.5
0.287
3,511
24
13.4
63.6
null
0
null
M0000
2025-01-04 09:00:00
1.187
49.77
8.11
0.303
3,503
28
10.2
56.2
null
0
null
M0000
2025-01-04 10:00:00
1.058
45.39
6.3
0.262
3,474
19.9
10.6
28.7
null
0
null
M0000
2025-01-04 11:00:00
0.999
45.25
6.94
0.242
3,477
27.4
10.8
31.1
null
0
null
M0000
2025-01-04 12:00:00
1.052
46.59
7.19
0.28
3,482
22.9
11.1
36.4
null
0
null
M0000
2025-01-04 13:00:00
1.033
45.81
7.04
0.26
3,481
31.1
10.6
35.2
null
0
null
M0000
2025-01-04 14:00:00
0.998
44.31
5.93
0.227
3,463
24.2
10.5
18
null
0
null
M0000
2025-01-04 15:00:00
1.019
46.16
7.79
0.238
3,487
23.1
10.4
41.2
null
0
null
M0000
2025-01-04 16:00:00
1.052
43.19
7.04
0.265
3,478
28.7
11.4
31.9
null
0
null
M0000
2025-01-04 17:00:00
1.11
44.74
7.91
0.239
3,485
22.8
10.7
38.9
null
0
null
M0000
2025-01-04 18:00:00
1.167
47.99
8.23
0.272
3,496
23.6
10.9
49.6
null
0
null
M0000
2025-01-04 19:00:00
1.116
49.69
9.09
0.287
3,508
28.1
9.8
60.8
null
0
null
M0000
2025-01-04 20:00:00
1.12
50.02
8.06
0.25
3,498
29.8
10.2
51.2
null
0
null
M0000
2025-01-04 21:00:00
1.192
52.16
9.83
0.288
3,527
28.6
11
78.2
null
0
null
M0000
2025-01-04 22:00:00
1.349
52.9
9.79
0.311
3,526
19.8
10.8
77.9
null
0
null
M0000
2025-01-04 23:00:00
1.223
50.2
9.29
0.326
3,525
26.3
11.7
76.8
null
0
null
M0000
2025-01-05 00:00:00
1.265
53.95
10.43
0.322
3,534
29.8
13
85
null
0
null
M0000
2025-01-05 01:00:00
1.227
50.71
9.43
0.315
3,520
25.5
9.2
72.1
null
0
null
M0000
2025-01-05 02:00:00
1.284
54.14
9.72
0.307
3,534
20.4
11.3
84.7
null
0
null
M0000
2025-01-05 03:00:00
1.403
54.86
9.93
0.31
3,539
19.8
9.8
89.6
null
0
null
End of preview.

QM Predictive Maintenance Sensors - Free Sample

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This free sample is non-commercial (CC BY-NC-SA 4.0). The paid full edition has a commercial licence.

Summary

Synthetic hourly industrial sensor data from 400 rotating machines with labelled failures and remaining useful life, for predictive-maintenance models; the paid full edition can be used commercially.

  • Best for: failure-prediction and RUL prototyping, condition-monitoring dashboards, teaching, demos without plant data
  • Not for: certifying or maintaining real equipment

Quick start

from datasets import load_dataset
ds = load_dataset("quailrobot/pred-maint-v1-sample", split="train")  # main table: sensors_sample.csv
# pandas alternative: pd.read_csv("hf://datasets/quailrobot/pred-maint-v1-sample/sensors_sample.csv")

Facts

  • Task: time-series / tabular: failure prediction (fail_within_72h), RUL regression, fault-type classification, anomaly detection
  • Labels: failures.csv (failure_time, failure_type, degradation_start); per-hour rul_hours, fail_within_72h, developing_fault = bearing_wear, misalignment, overheating, seal_leak, lubrication_loss
  • Full edition size: 3,504,000 hourly rows, 400 machines, 365 days, 358 failures (zip 38 MB)
  • Free sample size: 288,000 rows = first 30 days, 10 failures (sensors_sample.csv); labels right-censored at the window end
  • Format: full: Parquet (sensors) + CSV (machines, failures); sample: CSV
  • What's included (full edition): sensors.parquet, machines.csv, failures.csv, stats.json, benchmark.json, bench_pred_maint.py, README.md, LICENSE.txt
  • Price: $39 USD; checkout may display the equivalent in your local currency
  • Buy URL (primary): https://buy.polar.sh/polar_cl_K1eYrk4zv0iFgh6m67akS5ump9xqUXn1VgZJo2fE2w5
  • Licence (full edition): LicenseRef-QuailModel-Commercial (commercial use allowed, no resale of the data)
  • Licence (free sample): CC-BY-NC-SA-4.0
  • Validation: Our own test on the full edition: gradient boosting on 24 h / 168 h rolling features, time split (train Jan-Aug, test Sep-Dec) -> ROC-AUC 0.889, PR-AUC 0.470 (benchmark.json + script included).
  • Data source: 100% synthetic, generated by QuailModel with AI assistance (generator code written with an AI model)
  • Catalog (all QuailModel datasets, catalog.json, llms.txt): https://quailrobot-quailmodel.static.hf.space
  • Last updated: 2026-10-10

Validation

Our own test on the full edition: gradient boosting on 24 h / 168 h rolling features, time split (train Jan-Aug, test Sep-Dec) -> ROC-AUC 0.889, PR-AUC 0.470 (benchmark.json + script included).

Price & licence

  • Full edition: $39 USD. One-time payment, instant download after checkout: https://buy.polar.sh/polar_cl_K1eYrk4zv0iFgh6m67akS5ump9xqUXn1VgZJo2fE2w5
  • QuailModel Commercial Dataset Licence (SPDX: LicenseRef-QuailModel-Commercial): you may train, evaluate and ship models, including in commercial products. You may not resell or redistribute the dataset itself.
  • Free sample (this page): CC BY-NC-SA 4.0 - free for non-commercial use.

Limitations

  • 100% synthetic: not validated against real plant data.
  • Hourly resolution only; no raw vibration waveforms.
  • rul_hours, fail_within_72h and developing_fault are labels - exclude them from model inputs.

Custom dataset of YOUR object ($249)

Need data of YOUR object? Custom synthetic dataset, $249 USD -> order on Polar

  • Note: this is an image / object-detection service (not tabular data).
  • What you get: 2,000 labelled photoreal synthetic images (640x640 JPEG) of your own object or scenario (product, part, tool, drone, package, defect...), up to 3 classes, YOLO bounding boxes + data.yaml, train/val/test split, quality report
  • Licence: commercial use allowed
  • Price: $249 USD one-time; one round of adjustments included
  • Delivery: typically 3-5 business days after we receive your reference photos + rough dimensions
  • Optional sim-to-real test: send ~200 of your own labelled real images and we report how much the synthetic data improves a detector on them
  • Refund: full refund if we cannot deliver your request (14-day refund policy)
  • Limits: only objects you own or are allowed to use; no weapons or anything meant to harm people; no copied third-party 3D assets
  • Order URL: https://buy.polar.sh/polar_cl_AQu6LzRtqiQmKPlgPt0zePBtvWjJI4vULeFMQ4NLHH9
  • Details + contact: https://quailrobot-quailmodel.static.hf.space

This free sample: 288,000 rows = first 30 days, 10 failures (sensors_sample.csv); labels right-censored at the window end. Full commercial edition: 3,504,000 hourly rows, 400 machines, 365 days, 358 failures (zip 38 MB). Fully synthetic data; summary, facts, validation and limitations are in the block above.

Files

sensors (machine_id, timestamp, 8 sensor columns, rul_hours, fail_within_72h, developing_fault), machines.csv (type, site, age_years, rated_rpm), failures.csv (machine_id, failure_time, failure_type, degradation_start).

How it was made

Produced by QuailModel's own simulator, including legitimate activity alongside the labelled patterns. Labels are exact, because they are known by construction.

Credits

No third-party data was used.

Licence

Sample edition: CC BY-NC-SA 4.0 (non-commercial). The full commercial edition is sold by QuailModel (see the buy link).

Disclosure

Generated by QuailModel with AI assistance (generator code written with an AI model); all data is synthetic / computer-generated. Validate on your own real data before production use.

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