Revealing the Working Principle of Diffused Silicon Liquid and Gas Pressure Sensors，Detailed Explanation of KE-240-400BG5M

Diffused silicon liquid and gas pressure sensors are core components in modern industrial measurement，and KE-240-400BG5M，as a typical model，has a working principle that directly affects measurement accuracy and stability。This article provides an in-depth analysis of the strain effect principle of diffused silicon sensors，and，for popular models such as YM-DJYJ and the KS series，offers a comprehensive review from selection essentials to application scenarios，helping operators quickly master key technical parameters and purchasing techniques。

I、Core Working Principle of Diffused Silicon Pressure Sensors

The KE-240-400BG5M pressure transmitter adopts the piezoresistive effect principle of monocrystalline silicon。When medium pressure acts on the stainless steel isolation diaphragm，it is transmitted to the sensing element through filled silicone oil。The resistance value of the Wheatstone bridge diffused on the silicon chip changes with stress，and after laser trimming and compensation，it outputs a 4-20mA standard signal。Compared with traditional ceramic capacitive sensors，its repeatability error can be controlled within ±0.1%FS，and temperature drift is less than ±0.02%/℃。It is especially suitable for long-term monitoring of corrosive media in petrochemical processes，with typical applications including reactor pressure monitoring，pipeline leak detection and other scenarios。

II、Comparative Analysis of Key Selection Parameters

III、Analysis of Typical Application Scenarios

In compressed air systems，the KS-E-E-C-B01U-M-V model，with a 0-2.5MPa range and IP67 protection rating，can stably monitor pressure fluctuations in air storage tanks。The P-UA pressure transmitter，thanks to its ±0.5% accuracy and G1/2" threaded connection，has become the preferred choice for pump station monitoring in the water treatment industry。Special attention should be paid that when measuring strongly oxidizing media such as chlorine gas，a special tantalum diaphragm version should be selected to avoid intergranular corrosion of the common 316L diaphragm。

IV、Procurement Pitfall Avoidance Guide

• Misconception 1：Blindly pursuing high accuracy——Although the GT-V model offers high accuracy of 0.05%FS，the cost increases by 40%，and the 0.2%FS MBS-G5734 is more economical for ordinary working conditions
• Misconception 2：Ignoring the impact of temperature——The 9SGC-7B4FM has a built-in temperature compensation chip，and its stability in -20~85℃ environments is improved by 3 times compared with ordinary models
• Key verification：Ask the supplier to provide a third-party calibration report，with a focus on checking hysteresis and long-term drift data

V、Technology Development Trends

Industry research in 2023 shows that smart sensors with the HART protocol already account for 62%。New models such as KS-E-E-Z-B04U-M-V integrate self-diagnostic functions，which can predict the degree of diaphragm aging。In the next 5 years，the combination of wireless LoRa transmission and AI fault prediction will drive pressure sensors into a new stage of predictive maintenance。

Why Choose Us？

As a manufacturer of diffused silicon liquid and gas pressure sensors certified to both ISO 9001/14001，we provide：①18-month extended warranty ②Free technical support for model selection ③48-hour rapid sample delivery。Click online consultation to obtain the latest KS series selection manual，and contact us now to enjoy a 5% discount on engineering procurement。