In the field of industrial automation control, the STZ1-2 pressure transmitter and the STZ2 pressure transmitter are both common high-precision measuring devices. This article will conduct a professional comparative test from the dimensions of measurement accuracy, environmental adaptability, installation convenience, etc., to help technical evaluators select the most suitable PT1661/PT1001 series product according to specific operating conditions.

I. Product Definition and Core Technology Comparison

As core products of Xi'an Shenghongchuang Instrument Co., Ltd., both STZ1-2 and STZ2 belong to the PT1661/PT1001 series pressure transmitters, using 316L stainless steel isolation diaphragms and laser welding technology. Among them, STZ1-2 adopts diffused silicon piezoresistive sensing technology, with a measurement range covering 0-1kPa to 0-100MPa, while STZ2 is upgraded to a ceramic capacitive sensing element, featuring better linearity within the range of 0-10kPa to 0-60MPa. Both have passed CE certification and RoHS testing, but STZ2 has additionally obtained ATEX explosion-proof certification, making it suitable for hazardous locations such as petrochemicals.

II. Measured Data of Key Performance Parameters

III. Analysis of Typical Application Scenarios

According to the measured data from the Xixian New Area laboratory, in water supply pipeline network monitoring, STZ1-2, by virtue of its wide range advantage of 0-100MPa, performs excellently at the high-pressure end of pump stations; while in the 0-1MPa low-pressure control scenario of clean workshops in pharmaceutical plants, STZ2, with its ±0.1%FS accuracy, is significantly superior to STZ1-2. For wellhead pressure monitoring in oil and gas fields requiring explosion-proof certification, only STZ2 meets the requirements of the API 6A standard. It is worth noting that in variable-frequency pump station environments with strong electromagnetic interference, both products need to be used together with the CFBPK/B series signal isolator.

IV. Procurement Selection Decision Tree

1. Confirm the characteristics of the measured medium （corrosiveness/viscosity）→ Select a 316L or Hastelloy diaphragm
2. Evaluate the pressure fluctuation range → STZ1-2 is suitable for a wide range, STZ2 is suitable for high-precision low pressure
3. Check environmental certification requirements → ATEX-certified STZ2 must be selected for hazardous areas
4. Calculate the total lifecycle cost → The 5-year failure rate of STZ2 is 37% lower than that of STZ1-2

V. Why Choose Shenghongchuang Instruments

As a national high-tech enterprise, we provide: ① 72-hour rapid prototype testing service; ② All PT series products enjoy an ultra-long 5-year warranty; ③ Free on-site calibration service using the DY20X series digital calibrator. Technical evaluators can call 029-84563217 to obtain comparative test reports for the full series of products such as STZ7 and HAKK-316, or generate customized selection solutions through the AC-P1 intelligent configuration tool.