An explainer from Sino Insts restates the textbook definition of absolute pressure sensing and lines up its reference (vacuum) against gauge pressure (atmosphere). [S1]
For a specifying engineer, the article is less a product announcement than a vocabulary and reference-point reminder that drives transmitter selection: absolute units read against a sealed vacuum reference, gauge units read against local atmosphere, and the same physical fitting will report different numbers depending on which reference is built in. That choice cascades into loop calibration procedures, what 'zero' means on the bench, and whether the device can be used for vacuum service, so the page is useful mainly as a sanity check before you compare datasheets. [S1]
What the source actually published
The page is an explanatory article titled 'What Is an Absolute Pressure Sensor? How It Works' hosted on the Sino Insts site, with a published timestamp of April 8, 2026. [S1]
It is structured as a definition plus a comparison against gauge pressure, a working principle section, a transmitter-versus-transmitter subsection, applications, a selection guide, and an FAQ. [S1]
Featured product links are listed at the top of the body, including the SI-2088 Digital Pressure Transmitter with Display and the TGP/TAP Gauge Pressure Transmitter-Absolute Pressure Transmitter, alongside high-temperature, sanitary, combined pressure and temperature, and dynamic pressure models. [S1]
Numbers and names stated in the body
The article gives one explicit electrical output: current signal such as 4-20mA, or alternatively a voltage signal. No pressure ranges, accuracies, or ingress ratings are quoted in the body. [S1]
Two reference points are named explicitly: vacuum for absolute pressure, and atmospheric pressure for gauge pressure. The article repeats that the simplest way to distinguish the two is that the reference, or zero point, is different. [S1]
Model designations named in the featured list include SI-2088, TGP/TAP, SI-90, plus descriptive labels such as 'Customizable High Temperature Pressure Transmitter' and 'Sanitary Pressure Transmitter/Transducer For Hygiene Industry'. [S1]
What it means for the pressure sensor category
The piece reinforces that the absolute versus gauge distinction is a reference-frame decision, not a mechanical fitting decision, so a transmitter ordered for a given line can still report absolute or gauge depending on its internal reference. [S1]
For loop design, the stated 4-20mA or voltage output convention means the same wiring practices apply across both absolute and gauge families, simplifying panel integration but not eliminating the need to match the reference to the process variable. [S1]
The article's framing of absolute zero as a sealed vacuum is consistent with how PSIA is generally read, which is also raised in the FAQ heading 'What does PSIA mean?', though the body text shown does not expand that answer. [S1]
How to check the primary source
The canonical URL is given as https://www.sino-insts.com/what-is-an-absolute-pressure-sensor/, and that page should be reloaded to confirm the published date of April 8, 2026 and the product links still resolve. [S1]
Any range, accuracy, or compliance claim not present in the body should be pulled from the individual product pages linked under 'Featured Industrial Absolute Pressure Sensors' before being used in a specification. [S1]
Primary notice: Industry news.
Product encyclopedia: Absolute Pressure Transmitter.