Start with your process. Find the right instrument.
Learn measurement principles, check process conditions, configure products and save technical resources.

A complete English edition of this article has not been published. The complete available Chinese version is shown below.

← Back to knowledge hub
Selection and applications3 min readContent language: ChineseUpdated 23 October 2026

静压式液位计:压力与高度公式需要注意什么?

高度需用相应液体密度换算,压力单位和长度单位要一致。

直接回答

高度需用相应液体密度换算,压力单位和长度单位要一致。

静压关系为液柱压差等于密度乘重力加速度乘高度。

判断依据与适用条件

底部压力既可能含液柱也可能含顶部气相或附加液柱。将压力转成高度前,先明确参考压力、密度和高程;若密度或顶部压力变化未被处理,同样的压力变化不一定表示同样的液位变化。

在静压式液位计中,本题的检查对象是压力与高度公式。需要取得的证据是:注明压力参考、膜片高程及密度。先统一误差定义和实际工作点,再比较数值。按读数和按满量程的百分比在低端含义不同,随机离散也不能与稳定偏差混为一项。重复测量用于看离散,独立适用参照用于评估偏差;报告中应保留两者,不能以显示位数代替任何一项证据。

针对本题怎样核查

  • 先核对压力密度及单位。记录液柱压力、参考与高度,标明其中哪些是本次实际取得的,未提供的诊断或功能不得当作本机已有能力。
  • 列出压力与高度公式的原始输入、参考条件与所求量,采用一致量纲后再计算。
  • 围绕“注明压力参考、膜片高程及密度”建立前后对照,参照应适用于当前对象及条件。比较期间保留压力与高度公式的原配置及工艺状态,一次只处理已有证据指向的因素。

假设案例:如何作出判断

考虑“用水柱换算直接解释高密度药液”这一现场疑问。假设水高2米、密度1000,静压约19.6千帕,传感器读总压力不能直接当此压差。

此处先复算中间关系,再决定是否需要调整。

确认结果与交付记录

这道题的结果应回到“压力与高度公式”:结论旁写出支持它的注明压力参考、膜片高程及密度,并注明实际覆盖的状态、参照依据与仍待确认项目。报告保留压力与高度公式的原始记录和配置,不能把输出端的一次模拟签成未实际覆盖环节的通过。

案例为教学假设;限值及作业条件按实际型号和现场规程。参考文献不替代道威斯顿供货规格或认证。

Apply this knowledge to product selection

Customers and procurement

Check actual application and acceptance requirements against the article and product documentation. Bring open questions to DOWESTON for technical review.

Sales and technical teams

Record customer questions with application conditions. Verify range, interfaces and operating requirements against the selected model documentation.

Turn questions into application requirements

Collect application, connection, installation and acceptance requirements for the selected product, then review open points with DOWESTON.

Choose a product and prepare requirements
Not signed in to DOWESTON?
Create an account to start selecting products, check prices, and receive our newsletter on the latest products and trends.
Products & Services
Doweston offers a range of services to help you quickly build automated instrumentation systems. Contact us to learn more.
Ready to buy?
If you would like to purchase products,
simply contact our sales team — we are happy to help.
Who we are
DOWESTON delivers accurate and reliable measurement solutions
— trusted sensing and detection products for every industry!
Need service?
If you want to optimize production and reduce downtime,
we can help you choose the right spare parts and service products.
Edit Configuration

Product

Brand

Model

Confirm Changes Cancel
Your screen may be too small for the best experience.
We recommend using a computer,
or contact an engineer right away for selection support!
Need faster service? Call
400-888-4436
Continue Browsing