Pressure Transmitter

When selecting pressure transmitters, terms like “absolute pressure” and “gauge pressure” often cause confusion. A user once requested a pressure transmitter with a measurement range of 0~-90kPa absolute pressure, but was told that only a gauge pressure transmitter could be used. Why is that? 1. Absolute vs. Gauge Pressure: Understanding the Difference A user wanted […]

When measuring hydrogen gas with a pressure transmitter, it is common to coat the stainless-steel diaphragm with a thin layer of gold. This may seem unnecessary at first glance, but the reason lies in the unique properties of hydrogen and its interaction with stainless steel. Below, we explore the scientific and practical reasons for this

Pressure sensors use pressure-sensitive chips (such as piezoresistive silicon membranes) to detect pressure changes. If the sensor comes into direct contact with corrosive media, the silicon membrane may be damaged, affecting performance and reducing the sensor’s lifespan. Therefore, protective packaging is required to safeguard the pressure-sensitive chip while still allowing the pressure to be transmitted

The integration of flow meters and differential pressure (DP) transmitters is based on the principle of differential pressure measurement. The DP transmitter converts the small differential pressure signals generated by the flow element into standard electrical signals, enabling accurate flow measurement and remote transmission. This creates a symbiotic relationship between “flow measurement” and “signal conversion.”

In the field of industrial measurement, integrating pressure sensors with level transmitters is a fundamental technique for accurately measuring fluid levels. This integration leverages the principle that liquid static pressure is proportional to the liquid height, converting pressure signals into remote, precise level data. The process can be broken down into three core steps: signal

Selecting the right diaphragm for a pressure transmitter is crucial, as it directly affects the accuracy, stability, longevity, and overall reliability of the measurement. In industries like chemicals and pharmaceuticals, where corrosive environments are common, diaphragm selection is even more critical for both safety and cost control. Choosing the right diaphragm material and type can

When choosing the range for a differential pressure (DP) transmitter, it’s essential to consider both process conditions and the transmitter’s technical specifications. Below is a detailed guide outlining the key steps and considerations for selecting an appropriate DP transmitter range. 1. Determine the Measurement Range Identify the Maximum Range of Pressure Variation: Start by evaluating

1. Introduction Brief role of pressure transmitters in industrial automation. Importance of fault diagnosis and preventive maintenance. 2. No Output from the Transmitter Inspection & Testing (check power polarity, 24VDC supply, display head, loop continuity). Solutions (correct wiring, ensure ≥12V supply, replace faulty display, check loop impedance ≤250Ω). 3. Transmitter Output ≥20 mA Inspection &

Differential pressure (DP) transmitters are commonly used for flow measurement in various industrial applications. The principle is rooted in Bernoulli’s equation and the relationship between pressure differentials and flow rates in fluid dynamics. Here, we’ll explore the detailed workings of DP transmitters, the types of primary devices involved, and practical considerations for their use. Principle

1. Introduction In pressure and differential pressure transmitters such as the 1151 series, the measuring diaphragm is made of a flat metal sheet. At first glance, the pressure–displacement relationship of a flat diaphragm should be non-linear. However, under specific design and installation conditions, the diaphragm behaves in a nearly linear manner, which is essential for