Absolute Pressure

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?

View the comparison chart.

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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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?

	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	•	•