Sensor accuracy drifts, and stability is poor; many people overlook this when selecting a sensor.
2026-10-10
“We’ve tried sensors from several different brands, but the accuracy still doesn’t meet the requirements.”
“It worked fine right after installation, but after a few months of use, the data started drifting, and calibration couldn’t fix it.”
……
Anyone in the industrial measurement and control field knows that when customers complain about “insufficient accuracy” and “poor stability,” it’s often not because the sensor is inherently flawed right out of the box—quite the opposite: at first installation, the data looks perfect, but after a few months of operation and several thermal cycling cycles, the issues gradually surface.
The issue isn’t whether it’s accurate, but how long it can remain accurate.
Many customers focus on the accuracy specifications listed in the datasheet—0.1% FS, 0.05% FS—which look impressive. But what really gives production lines headaches is not whether the sensor is accurate on the day it’s installed, but whether it remains accurate after six months of operation and several thermal cycling cycles.
Traditional metal‑foil strain‑gauge pressure sensors attach a strain gauge to the surface of a metallic elastic element, whereas silicon‑based MEMS pressure sensors employ silicon–glass bonding. Both types feature an interface between dissimilar materials. Due to differences in the thermal expansion coefficients of these materials, repeated thermal cycling induces thermal stresses at the interface. Aging of the adhesive layer and interfacial creep can lead to the accumulation of irreversible residual stresses, which in turn cause zero‑point drift and sensitivity shifts.
In other words, the “poor stability” reported by customers often stems not from the circuit itself, but from the material interfaces. Backend compensation algorithms can only address the symptoms, making it difficult to tackle the root cause at the material level.
A new mode of integration: from “sticking on” to “growing together”
Songnuo Alliance’s technological approach introduces a fundamental shift at the root of this issue. By leveraging advanced atomic layer deposition and precision ion-beam etching, it directly deposits highly sensitive strain gauges with an extremely low temperature coefficient onto the surface of a metallic elastomer, achieving atomic‑level integration between the sensing element and the elastomer.
The distinction between “stick” and “extend” determines two things:
First, the adhesive layer typical of conventional manufacturing is completely eliminated. The sensing element and the elastomer are no longer joined in a “patchwork” fashion, thereby structurally suppressing the root cause of interfacial stresses. As a result, the sensor is no longer subject to the creep, hysteresis, and aging defects introduced by the traditional metal‑foil strain‑gauge bonding process, leading to a fundamental improvement in long-term stability.
Second, temperature compensation is no longer a mere “patch.” The sensor features built-in automatic temperature compensation, coupled with a specialized bridge‑arm and floating‑structure design, to deliver exceptionally low temperature drift and automatic zero‑point calibration.
The two figures that customers feel most strongly about
Focus on outcomes, not theory. In real-world use, customers are most sensitive to these two metrics:
The overall accuracy, including nonlinearity, repeatability, and hysteresis errors, can reach as high as ±0.075% of full scale. Certain models are capable of stable operation across an extreme temperature range from −196°C to 400°C.
After 10 million pressure cycles, the annual drift is ≤ ±0.05% FS. Many customers are less concerned with “how accurate it is when new” and more with “whether it remains accurate after one year of use.” This metric directly addresses the demand for long-term stability.
Test data further corroborate this: the Songnuomeng ultra‑high‑temperature nanofilm pressure sensor, which has been certified as compliant by a nationally recognized metrology authority, maintained a measurement accuracy better than 0.05% even after undergoing a full‑scale test of a solid‑rocket engine under conditions of 300°C, an instantaneous peak of 1,000°C, and an acceleration of 5,000 g. Precise Sensing, Safeguarding the Skies: Songnuomeng’s Aerospace‑Grade Pressure Sensors Achieve a Breakthrough in Independent and Controllable Technology
Why is a “stable underclass” more necessary now than in the past?
One noteworthy shift is that downstream customers’ demand for sensor stability is evolving from an “optional” consideration to a “must-have” requirement.
In the high-end sensor sector, domestic substitution is accelerating, yet the real challenge has never been whether a product can be developed—it’s whether it can maintain consistent performance over time. In applications involving high temperature, high pressure, and severe corrosion, accuracy and long-term stability remain the critical thresholds determining success or failure. Domestic pressure sensors are gradually expanding from traditional markets like consumer electronics into high‑end domains such as industrial control and aerospace; whether this transition can succeed hinges on the long-term consistency of underlying measurement data.
Another trend is intelligence. Sensors no longer merely output raw data; they now participate in decision-making at the edge. However, there’s a often-overlooked prerequisite: if the underlying data exhibits significant long-term drift, all subsequent intelligent analysis will rest on a faulty foundation. When sensors suffer substantial annual drift, accumulated measurement errors can progressively amplify. In predictive maintenance systems with stringent thresholds, this may lead to algorithmic misjudgments and false alarms.
The value of nanofilm technology lies precisely in addressing the “first mile” challenge: when data is stable at its source, everything that follows becomes meaningful.
Written at the end
From long-term online monitoring of the primary circuit in nuclear power plant reactors, to pressure‑stabilization control for ultra‑pure fluid delivery in semiconductor manufacturing, and further to high‑temperature, high‑pressure, highly corrosive process steps such as catalytic cracking and hydrogenation in the petrochemical industry, customers’ demand for sensors that “can be installed and then left alone” is expanding from a handful of high‑end applications to the industrial sector at large.
According to a recent report released by Straits Research, a global market research firm, the global pressure sensor market is projected to grow from US$22.57 billion in 2026 to US$51.64 billion by 2034, with a compound annual growth rate of 10.9%. Underpinning this growth is the increasingly stringent demand across industries for “long-term reliability of underlying data.”
The “stable substrate” that nanofilm technology can provide happens to lie at the very starting point of this demand curve.
If you’re struggling with sensor accuracy degradation or long-term drift under specific operating conditions, feel free to share the details in the comments—high temperature? Corrosive media? Or high‑frequency pressure cycling? You can also send us a private message with your operating parameters, and our technical engineers will get in touch. Perhaps SongnoMeng’s nano‑thin‑film pressure sensors are just what your application requires.
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