What Is an Absolute Pressure Transmitter?
Absolute pressure (AP) transmitters measure relative to perfect (full) vacuum pressure (absolute zero pressure); therefore, AP transmitters are not affected by fluctuations in the local atmospheric pressure. All absolute pressure measurements are positive. The letter ‘a’ or the abbreviation ‘abs’ in the unit of measure (i.e., inH₂O(abs) or psia) indicates an absolute pressure measurement.
Yokogawa absolute pressure transmitters use digital DPharp sensor technology to get accurate, reliable readings to you quickly.
Which Series Is Right for You?
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EJA310E
Traditional-mount Absolute Pressure Transmitter
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EJX310A
Traditional-mount Absolute Pressure Transmitter
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EJA510E
In-Line Mount Absolute Pressure Transmitter
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EJX510A
In-Line Mount Absolute Pressure Transmitter
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EJX610A
In-Line Mount Absolute Pressure Transmitter
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EJXC81A, EJAC81E (Absolute Pressure Diaphragm Seal)
Absolute Pressure Diaphragm Seal System
Details
What Is Absolute Pressure?
Measured in PSIA, (pounds per square inch absolute) absolute pressure refers to pressure detected in relation to a vacuum, a.k.a. absolute zero pressure, which is how absolute pressure transmitters relate to vacuum transmitters.
What Applications Use Absolute Pressure Devices?
- Food and beverage
- Lab
- Industrial
What Are the Benefits of Absolute Pressure Devices?
Process and loop monitoring for open tanks and vessels
Example Industrial Application: Any critical storage and delivery application (i.e., toxic gases) Because atmospheric conditions can fluctuate, it is imperative that these systems be accurate and use a reference that is static.
Which Series Is Right for You?
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| EJA-E Series | EJX-A Series | |
|---|---|---|
| Accuracy | ||
| ± 0.04% | • | • |
| ± 0.055% | • | |
| ± 0.075% | • | |
| ± 0.10% | • | |
| Stability | ||
| ± 0.2% of URL per 10 years | • | |
| ± 0.2% of URL per 7 years | • | |
| ± 0.1% of URL per 1 year | • | |
| Response Time | ||
| 90 msec | • | • |
| Mounting | ||
| Traditional-mount | • | • |
| In-line Mount | • | • |
| Safety | ||
| FMEDA Report | • | • |
| IEC 61508 Certified (SIL 2) | • | • |
| Specification Conformance | ||
| ±3σ | • | • |
Resources
Download this eBook and learn:
- The basic physics of pressure
- Different types of pressure sensors
- Features of pressure transmitters
- Pressure transmitters communications standards
- Key characteristics of pressure
- Common types of diaphragm seals
When selecting a Level Measurement device, what to consider in order to be accurate and repeatable?
Downloads
Brochures
Engineering Tools
Videos
Is it true that 4-20 mA HART will be phased out in the near future? Is a transducer equal to a transmitter? Tune in to hear the debunking of these myths.
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