Specification Product Pressure transmitter Model PM556 Measure range 0～0.6kPa…60MPa (Gauge pressure); 0～2kPa… 3MPa (Adiabatic pressure) Indication resolution ±0.075%FS; ±0.1%FS Ambient tempera
Product Introduction
Pressure transmitter uses the unique and proven silicon sensor with state-of-the-art digital processing to provide exceptional performance in terms of accuracy, long term stability and functionalities. -0.1MPa~40MPa full detection range.
ZL-P3000 pressure transmitter through corrugated, isolated diaphragm and filling oil, process media is pressurized to diaphragm of pressure sensor. The other end of pressure sensor diaphragm is connected to the air (for gauge measurement) or vacuum(for absolute measurement). In such way, it makes the resistor of sensor die change so that the detection system outputs different voltage. The output voltage is in proportion to the pressure variation, and then it is transmitted to standard output by adapter and amplifier.
Product Advantages
Application Field
1. Process Industries (Oil & Gas, Chemical, Petrochemical)
This is one of the most extensive and critical application areas.
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Tank Level Monitoring: Using hydrostatic pressure (P = ρgh) to calculate the level of liquids in storage tanks (e.g., crude oil, chemicals, LNG).
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Pipeline Pressure Monitoring: Ensuring safe and efficient transport of fluids through pipelines. They detect leaks (as a pressure drop), control pumping stations, and ensure pressure stays within design limits.
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Process Vessel Control: Monitoring and controlling pressure inside reactors, distillation columns, and separators where specific pressures are required for chemical reactions or separation processes.
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Wellhead Monitoring: In upstream oil & gas, they are used to measure wellhead pressure, a key parameter for reservoir management and production optimization.
2. Water and Wastewater Treatment
Pressure transmitters are ubiquitous throughout water infrastructure.
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Pump Control: Protecting pumps from running dry or against a closed discharge (dead-heading) by monitoring suction and discharge pressure. They are used to automate pump sequences.
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System Pressure Management: Monitoring pressure in water distribution networks to identify leaks, ensure adequate pressure for consumers, and control boosting stations.
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Filter Monitoring: Measuring the differential pressure across intake screens, sand filters, and membrane systems. A rising ΔP indicates clogging and signals the need for backwashing or cleaning
3. Power Generation (Thermal, Nuclear, Hydro)
Reliable pressure measurement is essential for safety and efficiency in power plants.
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Steam Systems: Monitoring steam pressure in boilers, superheaters, and turbines. Precise control is vital for efficiency and to prevent catastrophic equipment failure.
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Feedwater Systems: Controlling the pressure of water fed to boilers.
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Cooling Systems: Ensuring proper pressure and flow in critical cooling circuits for reactors and condensers.
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Hydraulic Systems: Monitoring fluid pressure in the hydraulic systems that control valves and other large equipment.
4. HVAC (Heating, Ventilation, and Air Conditioning)
Pressure transmitters are key to energy efficiency and comfort control in buildings.
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Chilled and Hot Water Systems: Monitoring pump status and controlling differential pressure in water loops to optimize flow and reduce energy consumption.
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Air Handling Units (AHUs): Measuring:
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Filter Status: Differential pressure across air filters to indicate when they need replacement.
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Duct Pressure: Controlling fan speed via Variable Frequency Drives (VFDs) to maintain building air balance and minimize energy use.
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Room Pressurization: Maintaining positive or negative pressure in critical spaces like hospital operating rooms or laboratories to control contamination.
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Technical Parameter
| Model | PM556 |
| Measure range | 0～0.6kPa…60MPa (Gauge pressure); 0～2kPa… 3MPa (Adiabatic pressure) |
| Indication resolution | ±0.075%FS; ±0.1%FS |
| Ambient temperature | -40 ~ 85 ℃ |
| Medium temperature | -40~100℃ |
| Storage temperature | -50~85℃ |
| Output signal | 4-20mA analog output / with HART communication |
| Diaphragm material | 316L stainless steel Hastelloy C (custom) |
| Process connection | 316L stainless steel |
| Fill oil | Silicone oil |
| Power supply | 24VDC |
| Long-term stability | ±0.1%FS/3 years |
| Inpress protection | IP67 |
