| General pressure units | Head units | Others | |||||||
|---|---|---|---|---|---|---|---|---|---|
| To convert from | bar | Pa | atm | psi | kg/cm2 | ft(H2O) | m(H2O) | in Hg | mm Hg/Torr |
| Multiply by | |||||||||
| bar | 1 | 100000 | 0.9869 | 14.504 | 1.0197 | 33.4562 | 10.1974 | 29.5301 | 750.06 |
| Pa | 100000 | 1 | 9.87*10(-6) | 1.45*10(-4) | 1.02*10(-5) | 3.34*10(-4) | 1.02*10(-4) | 2.95*10(-4) | 0.0075 |
| atm | 1.01325 | 101325 | 1 | 14.7 | 1.03 | 33.99 | 10.333 | 29.9 | 760 |
| psi | 0.06895 | 6894.8 | 0.068 | 1 | 0.0703 | 2.307 | 0.7031 | 2.036 | 51.715 |
| kg/cm2 | 0.9807 | 98066.5 | 0.968 | 14.22 | 1 | 32.809 | 10.0003 | 28.959 | 735.56 |
| ft(H2O) | 0.02989 | 2989 | 0.0295 | 0.4335 | 0.03048 | 1 | 0.3048 | 0.883 | 22.419 |
| m(H2O) | 0.09806 | 9806.4 | 0.9678 | 1.4223 | 0.099997 | 3.281 | 1 | 2.8958 | 73.554 |
| in Hg | 0.03386 | 3386.4 | 0.03342 | 0.4911 | 0.03453 | 1.133 | 0.3453 | 1 | 25.4 |
| mm Hg/Torr | 0.00133 | 133.32 | 0.001316 | 0.0193 | 0.00136 | 0.0446 | 0.0136 | 0.03937 | 1 |
| Pressure Sensing Technology | Model | Item | Accuracy | Range-min | Range-max |
|---|---|---|---|---|---|
| Silicon piezo-resistance (Diffused) | ESS319-7 | Pressure sensor element | 0.1%-0.2%/F.S | 0bar | 0.07bar |
| Silicon piezo-resistance (Diffused) | ESS319 | Pressure sensor element | 0.1%-0.2%/F.S | 0.1bar | 1000bar |
| Silicon piezo-resistance (Thick-film) | ESS315 | Pressure sensor element | 0.1%-0.2%/F.S | 0bar | 1500bar |
| Silicon piezo-resistance (Diffused) | ESS320 | Pressure sensor element | 0.1%-0.2%/F.S | 0.1bar | 25bar |
| Silicon piezo-resistance (Diffused) | ESS320 | Pressure sensor element | 0.1%-0.2%/F.S | 0.35bar | 35bar |
| Silicon piezo-resistance (Diffused) | ESL040 | Submersible level probe | 0.1%-0.2%/F.S | 3000mm H2O | 300m H2O |
| Metal Capacitance | ESS343 | Pressure sensor element | 0.25%-0.5%/F.S | 200pa (0.2kpa) | 200bar |
| Metal Capacitance | ESS343 | Pressure sensor element | 0.25%-0.5%/F.S | 200pa (0.2kpa) | 250bar |
| Metal Capacitance | EST4300 | Pressure transmitter (Smart) | 0.1%-0.2%/F.S | 300pa (0.3kpa) | 200bar |
| Silicon piezo-resistance (Monocrystalline) | EST4300M | Pressure transmitter (Smart) | 0.075%-0.1%（>=40kpa） | 200pa (0.2kpa) | 400bar |
| Ceramic Capacitance | ESS046 | Submersible level probe | 0.1%/F.S | 0.06bar | 500-800bar |
| Ceramic Capacitance | EST3120 | Pressure transmitter | 0.1%/F.S | 0.06bar | 300bar |
| Ceramic Piezo-resistance (Thick-film) | ESS501 | Pressure sensor element | 0.5%-1.0%/F.S | 0.5bar | 480bar; 680bar(Flush type) |
| Ceramic Piezo-resistance (Thick-film) | ESS501-I/V-IIC | Pressure sensor module | 0.5%-1.0%/F.S | 1bar | 50bar |
| Ceramic Piezo-resistance (Thick-film) | EST3120 | Pressure transducer | 0.5%-1.0%/F.S | 1bar | 250bar;700bar |
Common Use Pressure Units
There are several units used to measure pressure. Here are some common pressure units and their conversions:
1. Pascal (Pa): 1 Pa = 1 N/m^2
2. Atmosphere (atm): 1 atm = 101,325 Pa
3. Bar (bar): 1 bar = 100,000 Pa
4. Pound per square inch (psi): 1 psi = 6,894.76 Pa
5. Millimeter of mercury (mmHg): 1 mmHg = 133.322 Pa
6. Torr: 1 Torr = 133.322 Pa
Common Use Conversion Factors
To convert between these units, you can use the following conversion factors:
1. To convert from Pa to atm: divide by 101,325
2. To convert from Pa to bar: divide by 100,000
3. To convert from Pa to psi: divide by 6,894.76
4. To convert from Pa to mmHg: divide by 133.322
5. To convert from Pa to Torr: divide by 133.322