Steam pressure transmitter is the most commonly used sensor in industrial practice, widely used in various industrial automation environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automation, petrochemicals, oil wells, electricity, ships, machine tools, pipelines and many other industries.

Performance of steam pressure transmitter

1) Widely used as the tested medium, it can measure oil, water, and paste materials compatible with 316 stainless steel and 304 stainless steel, and has a certain anti-corrosion ability.

2) High accuracy, high stability, using imported original sensors, good linearity, and high temperature stability.

3) Small size, light weight, easy installation, debugging, and use

4) Stainless steel fully enclosed shell, good waterproof.

5) The pressure sensor directly senses the pressure of the measured liquid level, without being affected by the foaming or deposition of the medium.

6) The overall performance in the industrial field is ± 0.15%, optimizing the circuit performance

7) Five year stability ± 0.15%, which can greatly reduce the cost of calibration and maintenance

8) Faster dynamic response can reduce process variability

9) Introducing technology can achieve comprehensive measurement solutions

10) Local/External: Zero/Range Adjustable

Technical Parameter

Analog quantity: 2-wire 4-20mADC

Digital quantity: Two wire 4-20mADC and superimposed with process variable digital signals that comply with the HART protocol.

Power supply: Supply voltage 12.5-45VDC

Load limit: The maximum load resistance Rmax of the circuit depends on the supply voltage. HART communication requires a load resistance of no less than 250 Ω and no more than 600 Ω

Communication distance: The maximum communication distance is 1.5Km, and multi station communication can connect up to 15 intelligent transmitters.

Output display: four digit digital display, five digit LCD display, pointer type.

Explosion proof form: intrinsic safety type: ExiaII CT5; Explosion proof type.

Zero migration range: Zero can be freely shifted positively or negatively, but the set measurement range and range must not exceed the limit values.

Temperature range: Environmental temperature: -40~85 ℃ (-20~70 ℃ when using LCD indicator)

Measuring medium temperature:- 40～104℃

Static pressure and unidirectional overpressure range: 3.45KPa (absolute pressure) to 31.2MPa (gauge pressure)

Relative humidity: 5-98% RH

Start time: 5 seconds to start

Capacity change: less than 0.16cm3

Damping adjustment: Time ranging from 0.20 to 25 seconds

Fault alarm: If there is a fault in the sensor or circuit, the automatic diagnostic function will automatically output 3.9 or 21.0mA

Configuration protection: In order to prevent the configuration data of the transmitter from being arbitrarily modified, the stored data can be locked through software or protection switches

Correct use

During the use of pressure sensors, the following situations should be considered:

1. Prevent the transmitter from coming into contact with corrosive or overheated media;

2. Prevent sediment from settling inside the conduit;

3. When measuring liquid pressure, the pressure tap should be opened on the side of the process pipeline to avoid sedimentation and slag accumulation;

4. When measuring gas pressure, the pressure tap should be opened at the top of the process pipeline, and the transmitter should also be installed at the top of the process pipeline to facilitate the injection of accumulated liquid into the process pipeline;

5. The pressure pipe should be installed in a place with small temperature fluctuations;

6. When measuring steam or other high-temperature media, it is necessary to connect a buffer tube (coil) or other condenser, and the working temperature of the transmitter should not exceed the limit;

7. When freezing occurs in winter, transmitters installed outdoors must take anti freezing measures to prevent the liquid in the pressure inlet from expanding due to freezing volume, which may cause damage to the sensor;

8. When measuring liquid pressure, the installation position of the transmitter should avoid the impact of the liquid (water hammer phenomenon) to prevent damage to the sensor due to overpressure;

9. When wiring, thread the cable through the waterproof joint (accessory) or flexible tube and tighten the sealing nut to prevent rainwater and other substances from leaking into the transmitter housing through the cable.