Before installing the SP-112G pressure transmitter，accurate dimensional verification is critical to ensuring proper equipment operation。This article provides a download for the SP-112G pressure transmitter dimensional drawing，and explains in detail the 3 core dimensional parameters that must be confirmed before installation，helping technical evaluation personnel avoid installation errors and improve the stability and measurement accuracy of industrial flow control systems。

SP-112G Pressure Transmitter Dimensional Drawing Download and Core Parameter Analysis

As a typical representative of diffused silicon liquid and gas pressure sensors，the installation accuracy of the SP-112G pressure transmitter directly affects the reliability of measurement data。Technical evaluation personnel need to focus on the following 3 dimensional parameters：flange interface diameter，threaded connection length，and overall equipment height。The flange interface diameter must match the pipeline，with standard specifications ranging from DN15 to DN50，and an error exceeding ±0.5mm may cause seal failure；the threaded connection length is recommended to be controlled within the range of 20-25mm，too short may easily cause leakage，while too long may damage the sealing surface；at least 50mm of maintenance space should be reserved for the total equipment height，and under special operating conditions，space compensation should be carried out with reference to the IEC 61518 standard。

Industry Background：Stringent Requirements for Dimensional Accuracy in Flow Control Equipment

In industrial scenarios such as petrochemicals and power energy，installation errors of pressure transmitters may trigger chain reactions。A case from a refinery shows that a 1.2mm deviation in the flange dimension of a PTHY-A pressure transmitter resulted in an average annual unplanned downtime loss of 370,000 yuan。By comparison，the SP-112G adopts a modular design，with its dimensional tolerance controlled within ±0.3mm，meeting the requirements of the GB/T 17614.3-2015 standard。During technical evaluation，the effect of ambient temperature on the metal expansion coefficient should also be considered，and a 0.1% dimensional compensation margin is recommended for operating conditions from -20℃ to 80℃。

Technical Parameter Comparison：Differentiated Advantages of SP-112G Compared with Similar Products

Common Installation Misconceptions and Solutions

Technical evaluation personnel often overlook the dimensional differences between SP-111G and SP-112G，the former uses M20×1.5 threads while the latter uses G1/2"。We recommend downloading the official dimensional drawing and then using a 3D scanner for physical comparison。By using this method，a semiconductor enterprise improved the installation pass rate of the YM-1JY pressure transmitter from 82% to 99.6%。For special media operating conditions，the PRC-905 pressure transmitter can provide customized dimensional solutions，but the technical agreement must be submitted 15 working days in advance。

Why Choose Xi'an Shenghongchuang Instrumentation

As a national high-tech enterprise in Xixian New Area，we have a CNAS-accredited laboratory and can provide dimensional accuracy inspection reports for the full range of products such as 18.601G-G。All SP-112G pressure transmitters are rechecked with a laser rangefinder before leaving the factory and are supplied with an installation positioning template。Our technical team responds to dimensional inquiries 24 hours a day and supports remote AR-guided installation。Click to download the complete dimensional drawing package（including DWG/CAD formats），or call 029-8456XXXX to obtain customized solutions for products such as 30.600G-G。