Differential Pressure Transducer, Output 4-20mA HART

Differential pressure transducer for air/water/oil pressure measurement has optional output signal 4-20mA or 4-20mA HART.

Applications

Pressure transducer is widely used in process control, chemical, petroleum and metallurgical industry and other fields.

Features

• Model: ATO-PRES-2051
• Measuring Range: 0~3MPa (0~30bar/0~435 psi)
• Range Ratio: 10:1 (minimum), 100:1 (maximum)
• Output Signal: 4-20mA, 4-20mA HART
• Accuracy: ±0.1%FS
• Power Supply: DC 24V
• Connection: The connecting thread on the pressure tap is 1/2 NPT. The thread of the output cable connection hole is M20*1.5 mm.
• Protection Class: IP65
• Measuring Medium: Air, water, oil
• Pressure Type: Gauge pressure (standard), contact us for absolute pressure, sealed pressure type (note that the measuring range for these two types must ≤1MPa)

Mounting Diagram

Unit: mm.

Wiring Diagram

Tips: Operating steps of start and stop a differential pressure transducer

There are at least five valves connecting with the differential pressure transducer, among, two sampling valves are used for sampling and cutting off the process media, two blow-down valves are used to flush the connecting pipe or remove condensate or gas from the connecting pipe. The connecting pipes are connected with the differential pressure transducer through three-valve group or five-valve group, and the starting and stopping of differential pressure transducer are mostly operated on the three-valve group.

1. Stop Method of Differential Pressure Transducer
   When closing the differential pressure transducer, the steps for closing the three-valve group are as follows: close the negative pressure valve first, then open the balanced valve, and finally close the positive pressure valve. If the differential pressure transducer is out of operation for a long time, both positive and negative pressure valves of primary valve and three-valve group should be closed, the balanced valve should be opened to ensure equal pressure on both sides of the transducer's measuring room, in a balanced state.
2. Start Method of Differential Pressure Transducer
   When starting the differential pressure transducer, the steps for opening the three-valve group are as follows: open the positive pressure valve firstly, then close the balanced valve, and finally open the negative pressure valve.
   When starting or stopping the differential pressure transducer for steam flow measurement, the differential pressure transducer with isolator, and the liquid level differential pressure transducer with a balanced container, the positive pressure valve/negative pressure valve/balanced valve cannot be opened at the same time when operating the three-valve group. Because even if it is opened in a short time, the condensate water in the balanced container and the isolation fluid in the isolator may run off, resulting in the incorrect display of meter, and even the differential pressure transducer cannot be put into operation in serious cases. When necessary, the drain valve and exhaust valve on the measurement room of differential pressure transducer shall be used to remove the air or condensate water.