Starting price
฿450
/ kPa
Bourdon Tube Pressure Gauge
Model: Bourdon Tube
The Bourdon tube pressure gauge is a mechanical instrument that uses the elastic deformation of a curved C-tube to indicate pressure. It covers vacuum to 1000 kPa depending on the model and is ubiquitous in hydraulic, pneumatic, and gas systems across Thai industry. ASME B40.100 Grade B accuracy of ±1% FS suits general process monitoring where high precision is not critical. Calibration is performed by comparison against a dead weight tester or traceable digital pressure calibrator.
Meas. Range
0–1000 kPa
Accuracy
±1% FS (Grade B)
Specifications
| Standard | ASME B40.100, EN 837-1 |
| Accuracy (Grade A) | ±0.5% FS |
| Accuracy (Grade B) | ±1% FS |
| Dial Size (common) | 63, 100, 160 mm |
| Bourdon Tube Material | Brass / Stainless steel (model-dependent) |
| Measuring Range (typical) | 0 – 1000 kPa (0 – 10 bar) |
Use Cases
Installed on tanks, steam lines, compressed air systems, water supply, and hydraulic lines in food, chemical, and pharmaceutical plants.
Frequently Asked Questions
How often should a Bourdon tube gauge be calibrated?+
Typically every 1–2 years, but GMP and OSHA-regulated processes require 6–12 month intervals, or any time a gauge has been subjected to a shock or impact.
What is ±1% FS at 1000 kPa in actual pressure?+
±10 kPa. For tighter accuracy such as ±0.1% FS, consider a digital pressure transducer or a Grade 1A precision test gauge instead.
What is the difference between gauge pressure and absolute pressure?+
Gauge pressure (psig/kPag) is measured relative to atmospheric pressure. Absolute pressure (psia/kPaA) is measured from perfect vacuum. Most Bourdon gauges read gauge pressure.
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