Industrial sensors et measurement instruments
Common industrial sensors pour température, pression, débit, et level measurement.
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Overview
Process control relies on accurate measurement of temperature, pressure, flow, and level.
Temperature Sensors
7 lignes
Sensor Type | Temperature Range(°C) | Accuracy | Response Time |
|---|---|---|---|
| Type K thermocouple | -200 to 1260 | ±1.5°C or 0.4% | Fast |
| Type J thermocouple | -210 to 760 | ±1.5°C or 0.4% | Fast |
| Type T thermocouple | -200 to 350 | ±0.5°C or 0.4% | Fast |
| Pt100 RTD | -200 to 850 | ±0.1°C (Class A) | Medium |
| Pt1000 RTD | -200 to 850 | ±0.1°C | Medium |
| Thermistor (NTC) | -50 to 300 | ±0.1°C | Fast |
| Infrared (non-contact) | -50 to 3000 | ±1–2°C | Very fast |
Source: engineeringtoolbox.com
Pressure Sensor Types
| Type | Range | Accuracy |
|---|---|---|
| Strain gauge | 0–600 bar | ±0.25% FS |
| Piezoelectric | 0–7000 bar | ±1% |
| Capacitive | 0–400 bar | ±0.075% FS |
| Manometer (U-tube) | 0–2 bar | ±1 mm |
| Bourdon tube | 0–600 bar | ±0.5–2% |
Flow Measurement
| Type | Application | Accuracy | Turndown |
|---|---|---|---|
| Orifice plate | General liquids/gas | ±1–3% | 3:1 |
| Electromagnetic | Conductive liquids | ±0.2–0.5% | 100:1 |
| Ultrasonic (transit time) | Clean liquids | ±0.5–1% | 50:1 |
| Coriolis | Mass flow (any fluid) | ±0.1–0.5% | 100:1 |
| Vortex | Steam, gas, liquid | ±0.75–1.5% | 20:1 |
| Turbine | Clean liquids | ±0.15–0.5% | 10:1 |