Selection and oil filling of capillaries in Pressure transmitter and Pressure transmitter housing

Release time:

2022-04-13

After adding a set of remote capillary tube and remote diaphragm to ordinary Pressure transmitter and Pressure transmitter housing, the influence of various factors on transmitter measurement should be considered. The measurement accuracy and dynamic response time of the Pressure transmitter and Pressure transmitter housing will vary greatly, and the error caused is likely to be very large.

Selection and oil filling of capillaries in Pressure transmitter and Pressure transmitter housing

Pressure transmitter housing china

The length, thickness and material of the capillary in the Pressure transmitter and Pressure transmitter housing are the key factors. The principle of length is to meet the working conditions, as short as possible; the choice of thickness needs to consider the physical properties of oil filling and the requirements of dynamic response time. The material is determined according to the usage environment. When determining whether the Pressure transmitter and the Pressure transmitter housing can meet the requirements, under the specified process conditions, the thickness and length of the capillary, the characteristics of various filling oils, the size of the remote diaphragm, the material, the transmitter range, and the installation can be integrated. According to various influencing factors such as the method, according to the relevant software calculation, it can be concluded whether the Pressure transmitter and the Pressure transmitter housing are suitable for the process conditions.

Multiple oil filling options for Pressure transmitter and Pressure transmitter housing further widen the range of applications. However, in low temperature, high temperature, sanitary and other occasions, the requirements for oil filling are strict. General principles for selecting filling oil in Pressure transmitter and Pressure transmitter housing: The process pressure and temperature operating point must be at the stage where the temperature of the selected filling oil changes little with the pressure; Silicone oil has better comprehensive performance and is a more commonly used filling oil; Silicone oil for high temperature measurement usually has a relatively large viscosity, and a thicker capillary must be selected to match it to ensure reasonable dynamic response performance; whether the filling oil and the measurement medium will react when contacting is also filled with oil in the Pressure transmitter and Pressure transmitter housing. Choose what must be considered.

Through the above introduction and analysis of Pressure transmitter housing, hope it helps you.

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