INQUIRY
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Q1: What is the biggest difference between a remote transmitter and a regular pressure transmitter?
A: The ordinary transmitter medium directly enters the measurement chamber; The remote transmitter relies on an isolation diaphragm and an oil-filled capillary tube to transmit pressure, and the medium does not come into contact with the transmitter body. Suitable for high-temperature, high-viscosity, easily crystallizable, and highly corrosive media, enabling on-site measurement and remote signal reception in the central control room.
Q2: Is it better to have a longer capillary tube for remote transmitters? What are the restrictions?
A: It's not that the longer is better. Excessive capillary length can increase temperature drift and affect measurement accuracy. It is generally recommended to measure 1-5 meters. For working conditions with large temperature differences, try to shorten the capillary tube as much as possible, and at the same time, do a good job of capillary tube protection to avoid squeezing and bending.
Q3: Which operating conditions require the use of remote transmitters?
A: ① High temperature of the medium, exceeding the tolerance temperature of the transmitter body; ② The medium is viscous, crystalline, and prone to clogging the pressure pipe; ③ Strong corrosive media can damage the measuring components of the transmitter; ④ The hygiene requirements are high, and there should be no working conditions with dead corners caused by pressure.
Q4: What parameters can remote transmitters mainly measure?
A: Mainly measuring pressure and differential pressure, achieving liquid level and interface measurement through differential pressure conversion. Widely used in storage tanks, reactors, and towers, outputting 4-20mA standard signals to interface with DCS/PLC systems.
