As the core equipment for industrial flow control，the YM-115 pressure transmitter’s stable operation of its diffused silicon sensor directly affects production safety。This article addresses the 7 common fault symptoms of the YM-115 pressure transmitter and provides professional solutions，covering practical content such as the calibration method for the YM-1KGR model and interpretation of YM-130 specifications and parameters，helping operators quickly diagnose and resolve diffused silicon sensor issues。

Technical Principles and Industry Applications of Diffused Silicon Sensors

Diffused silicon pressure sensors use semiconductor strain gauges as sensitive elements，and a Wheatstone bridge is fabricated on a silicon wafer through MEMS technology。When external pressure is applied，it causes changes in resistance value，thereby outputting an electrical signal that has a linear relationship with pressure。In industries such as petroleum，chemical engineering，and electric power，YM series transmitters are widely used in scenarios such as pipeline pressure monitoring and tank liquid level measurement thanks to their high accuracy of 0.1%FS and IP65 protection rating。It is worth noting that the domestic liquid level transmitter XT21F also adopts similar technology，and its 316L stainless steel material is especially suitable for corrosive environments such as fire water tanks。

7 Typical Fault Symptoms and Solutions

1. Abnormal Zero Drift

When the displayed value of the YM-115 continuously deviates under no-pressure conditions，first check whether the pressure guide tube is blocked，and then use a handheld terminal to read the sensor’s original signal。If the AD value fluctuation exceeds ±5，zero calibration must be performed according to the YM-1QQ manual。The XT21F liquid level sensor with long-term stability up to ±0.2%FS/year adopts laser trimming compensation technology，and its temperature drift control solution can be used as a reference。

2. Unstable Output Signal

This appears as intermittent jumping of the 4-20mA signal，usually caused by power supply interference or poor grounding。Recommendations：① Measure whether the power supply voltage is stable within the range of 24VDC±10%；② Check the single-ended grounding of the shielded cable；③ Compare the technical parameters of DMK331-250-4000 to confirm that the load resistance is ≤500Ω。

Procurement Selection and Alternative Solution Comparison

For applications requiring measurement of highly corrosive media，the tantalum diaphragm version of MBS-G3131 can be considered；if the budget is limited，YSZK-01G-C has a lower price but an accuracy of class 0.5。The YM series provided by Xi’an Shenghongchuang Instrument Co., Ltd. have all passed CE certification，and their three-stage lightning protection module design is superior to the industry average。

Why Choose Our Solutions

As a high-tech enterprise in Xixian New Area，we provide an extended 3-year warranty for products such as YM-1XH，and our technical support team has more than 10 years of experience in fluid control。For YM-115 pressure transmitter faults，we can provide remote diagnosis and on-site service to ensure that the diffused silicon sensor restores the calibrated accuracy of ±0.1%FS。