Detailed Specifications and Model Description of KGY-KGY50 Pressure Transmitter

As a representative model of industrial-grade diffused silicon pressure transmitters，KGY-KGY50 uses the piezoresistive effect principle of monocrystalline silicon as its core，converting pressure signals through resistance changes in semiconductor strain gauges。This series offers multiple accuracy grades from 0.5%~0.1%FS，with standard measuring ranges covering -0.1~60MPa，and is especially suitable for hydraulic systems，compressor monitoring and other scenarios。Compared with the conventional model PT124B-213-2MPa，KGY50’s ceramic sintering process improves the sensor’s corrosion resistance by 40%，and its full stainless steel housing meets the IP67 protection standard。

Comparison of Technical Parameters of Diffused Silicon Sensors

For applications requiring micro differential pressure measurement，Domestic Differential Pressure Transmitter PTL802F Air Pressure Sensor Gas Micro Differential Pressure Transmitter provides high-resolution detection of 0~±500Pa，using sensitive elements imported from Germany，with particularly outstanding performance in HVAC systems。This product has passed Exia II CT5 explosion-proof certification，with vibration error controlled within ±0.01%FS，making it an ideal choice to replace traditional mechanical differential pressure gauges。

Working Principle and Calibration Method of Diffused Silicon Sensors

Taking model 2091200PG-H2 as an example，its core component is a Wheatstone bridge made of a monocrystalline silicon wafer。When medium pressure acts on the isolation diaphragm，it is transmitted to the sensitive element through silicone oil，causing resistance value changes and outputting an mV-level signal。According to the JJG 882-2019 pressure transmitter verification regulation，the calibration of PT3100-10-I-U requires the use of a 0.05-grade standard pressure source，calibration at four points of 25%/50%/75%/100% of the range，and recording of zero/full-scale output values。

Handling Common Calibration Issues

• Zero drift：Check whether the sealing ring is aged，and eliminate the possibility of medium crystallization
• Output nonlinearity：Perform three-point calibration again or contact the manufacturer for temperature compensation
• Signal interference：Use twisted-pair shielded cables，and ensure grounding resistance ＜4Ω

Accuracy Grades and Key Selection Points

The 0.33%FS accuracy of model PAA-21SC-80400.33 is suitable for most process control scenarios，while the 0.1%FS high-accuracy version of KGY50 can be used in custody transfer systems。Key considerations during selection include：

1. Medium compatibility：Corrosive media require a Hastelloy diaphragm
2. Temperature influence：Heat sink fins should be selected for environments above 85℃
3. Dynamic response：Pulsating pressure applications require a response time below 2ms

For gas pressure measurement，it is recommended to prioritize models with medium temperature compensation，such as YM-MHQ，whose built-in PT1000 temperature sensor can control temperature drift within 0.02%FS/℃。

Typical Fault Diagnosis and Maintenance

Abnormal LCD display of model PBLN-C is usually caused by power supply interference or EEPROM damage，and can be checked through the following steps：

For economical pressure transmitters such as 501-9000031，regularly checking the condition of the O-ring seal can prevent 80% of leakage failures。It is recommended to perform zero calibration every 6 months and use a standard pressure source to check accuracy degradation。

Industry Applications and Selection Recommendations

In the petrochemical field，MPM489(0-40MPa)E22B1C5S has become the preferred choice for reactor pressure monitoring thanks to its intrinsically safe explosion-proof design。The food and pharmaceutical industries prefer the PAA-21SC series due to its FDA-compliant 316L stainless steel material。It is worth noting that Domestic Differential Pressure Transmitter PTL802F Air Pressure Sensor Gas Micro Differential Pressure Transmitter has gradually replaced imported brands in cleanroom differential pressure control，and its normalized circuit structure enables long-term stability of ±0.1%FS/year。

Solutions for Special Operating Conditions

• High-viscosity media：Select a conical diaphragm and increase the process connection diameter
• Crystallizing media：Use a flange-type flushing ring design
• Strong vibration environmentInstall anti-vibration brackets and select an oil-filled sensor