Using the YM-109 pressure transmitter as an example，this article explains in detail the wiring diagram for diffused silicon liquid and gas pressure sensors and 5-minute quick installation tips。As a key component in industrial automation，correct wiring directly affects the measurement accuracy and service life of models such as PT-507 and FY-FY211，and Xi'an Shenghongchuang Instrumentation will provide you with professional guidance。

I、Technical Principles and Industry Applications of Diffused Silicon Pressure Sensors

Diffused silicon pressure sensors are based on the semiconductor piezoresistive effect，converting pressure into electrical signals through a Wheatstone bridge structure on a silicon wafer。Their core advantages are Class 0.25 high accuracy and low temperature drift of ±0.05%FS/℃，making models such as FY-FY212 particularly suitable for long-term monitoring under harsh operating conditions in petrochemical，environmental protection and other industries。According to ISO 9001:2015 certification requirements，the YM-1001 series products manufactured by Xi'an Shenghongchuang adopt laser calibration technology，ensuring that every device is traceable to national pressure standards。

1.1 Analysis of Typical Application Scenarios

In the field of hydraulic control systems，the DMP-DMP335 pressure transmitter used with the Domestic General-Purpose Pressure Transmitter RF-BPS316 Waterproof High-Precision Pressure Sensor can achieve annual stability of ±0.1%FS。A rail transit project case shows that the PMP131-A1B01A73 model made of 316 stainless steel operated continuously for 8000 hours in a locomotive braking system without drift，and its IP65 protection rating effectively resisted corrosion from humid environments。

II、Step-by-Step Analysis of the YM-109 Wiring Diagram

The figure below shows a standard four-wire wiring scheme，with the red lead connected to the positive terminal of the 24VDC power supply，the black lead connected to the negative terminal，the green lead as the 4-20mA signal output，and the white lead as the grounding wire。Special attention is required：when used with the DMK-DMK457 display instrument，the shielding layer must be grounded at one end only to avoid signal interference。

III、Key Points for Installation and Commissioning

During the assembly stage of the 8472.25-5717 accessory，first use M20×1.5 thread sealant to secure the sensor body。Before power-on，check whether the range switch of the YM-110 model matches the application（the 0-1MPa range corresponds to DIP switch positions 1/4/ON），otherwise it may cause overload damage to the FY-FY211 sensor。According to the IEC 60770 standard，zero-point calibration is recommended every 6 months。

3.1 Common Troubleshooting

When signal jumps occur，first check whether the pressure port of the PT-507 pressure transmitter is blocked。If used with the RF-BPS316 model，its innovative ceramic diaphragm design can effectively prevent particle intrusion，and this technology has been verified by a CNAS laboratory。

IV、Technical Evaluation and Model Selection Recommendations

Compared with traditional piezoresistive sensors，the YM-1001 series using diffused silicon technology offers clear advantages under -30~85℃ operating conditions。For building automation systems，it is recommended to select models with a Gl/2 male threaded connection，as their 1ms response speed can meet the dynamic pressure monitoring requirements of HVAC systems。

As the first sensor manufacturer in Northwest China to obtain SIL2 certification，Xi'an Shenghongchuang Instrumentation Co., Ltd. provides technical support for the full range of products from DMP335 to PT-507。Click to view the detailed parameters of the Domestic General-Purpose Pressure Transmitter RF-BPS316 Waterproof High-Precision Pressure Sensor，or call 400-XXX-XXXX for a customized solution。