Introduction

When purchasing NS-WY06、SH series or wireSENSOR series draw-wire displacement sensors，are you concerned that the performance may not meet the standard？As a core component of flow control equipment，choosing the wrong sensor may lead to project delays and cost overruns。This article reveals 5 key questions you must ask suppliers，helping you avoid procurement risks and ensure that models such as SH10/SH150 accurately meet your distance measurement requirements。

1. Does the sensor’s measurement accuracy meet the project requirements？

In flow control equipment，the accuracy of a draw-wire displacement sensor directly affects the overall performance of the system。Taking the SH30 displacement sensor as an example，its nominal accuracy is usually ±0.1%FS，but in actual applications，factors such as ambient temperature and mechanical vibration may cause accuracy degradation。It is recommended to clarify the following details with the supplier：

• Whether the nominal accuracy includes non-linearity error and repeatability error
• Accuracy variation curve within the -20℃~60℃ operating temperature range
• Whether a third-party test report is provided（such as CNAS certification）

For long-stroke models such as wireSENSORP200，attention should also be paid to the impact of the steel wire rope’s expansion coefficient（usually ≤0.01%/℃）on the measurement results。

2. Can the protection rating and materials adapt to the on-site environment？

Industrial sites often have dust，oil contamination or humidity issues。Taking the SH70 displacement sensor as an example，although its IP67 protection rating can provide dustproof and waterproof performance，a higher-standard sealing design may be required in the chemical industry。Key confirmation points include：

Special reminder：In the food and pharmaceutical industries，it is necessary to confirm whether the sensor complies with FDA material certification。

3. Does the signal output type match the existing control system？

The SH150 displacement sensor usually provides 4-20mA/0-10V analog output，while wireSENSORP96 may be equipped with an RS485 digital interface。Before procurement，you must confirm：

• Interface protocol compatibility of PLC or DCS systems
• Signal transmission distance and anti-interference capability（such as the need for shielded cables）
• Whether customized Modbus RTU/TCP communication protocols are required

A case shows that a certain water treatment project failed to verify the signal type，resulting in the later addition of an extra signal converter and a 35% cost increase。

4. Are there potential conflicts in the mechanical installation method？

Details such as the installation angle of draw-wire sensors（recommended 0°-90°）and mounting hole dimensions are often overlooked。Taking the SH10 displacement sensor as an example：

• Confirm whether the reserved installation space of the equipment is ≥1.2 times the sensor body size
• Check the angle between the steel wire rope outlet direction and the motion trajectory（ideally 0°）
• Ask whether mounting brackets are provided（for example，wireSENSORMP comes standard with a quick-release bracket）

It is recommended to request 3D model files for virtual assembly verification to avoid on-site modifications。

5. Supplier’s industry experience and after-sales support capability

Professional suppliers such as Xi’an Shenghongchuang Instrument Co., Ltd. can provide：

• Similar project cases（such as an oilfield flow control system using SH70 sensors）
• 24-hour technical response mechanism
• Calibration cycle recommendations（generally requiring return-to-factory calibration every 12 months）
• Spare parts inventory status（especially for special models such as wireSENSORP115）

Summary and Recommended Actions

When selecting draw-wire displacement sensors，be sure to conduct in-depth verification from 5 dimensions：accuracy，environmental adaptability，signal compatibility，mechanical matching and supplier qualifications。As a high-tech enterprise，Xi’an Shenghongchuang’s NS-WY06，SH series and wireSENSOR series products have passed ISO9001 certification and can provide customized solutions。

Contact our technical team now，to obtain selection manuals for models such as SH30/SH150 and free solution consultation，ensuring zero-risk advancement of your flow control project。