GreenPrima PST AB500 Electromagnetic Flow Meter
| Brand | GreenPrima |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | OEM/ODM Producer |
| Product Category | Domestic (China-Made) |
| Model | PST AB500 |
| Pricing | Available Upon Request |
| Measured Velocity Range | 0.1–15 m/s |
| Nominal Diameter Range | DN10–DN2200 |
| Accuracy | ≤0.3% of reading |
| Repeatability | ±0.1% |
| Display | Backlit LCD |
| Minimum Conductivity | >5 µS/cm |
| Electrode Materials | 316L stainless steel, Hastelloy B/C, Titanium, Tantalum, Platinum-Iridium, Niobium, Nickel |
| Lining Materials | PTFE, PFA, Neoprene, Polyurethane |
| Process Temperature | –30°C to +250°C |
| Ambient Temperature | –30°C to +65°C |
| Installation Options | Integral or Remote (Split-type) |
| Output Signals | 4–20 mA (HART-enabled), Frequency/Pulse, Dry Contact (SPST) |
| Communication Protocols | MODBUS RTU (standard), HART, GPRS (optional) |
| Power Supply | 85–260 VAC or 11–40 VDC |
| Empty Pipe Detection & Zero Calibration | Yes |
Overview
The GreenPrima PST AB500 Electromagnetic Flow Meter is a high-performance, industrial-grade inline flow measurement instrument engineered for continuous volumetric flow monitoring of conductive liquids in demanding process environments. Operating on Faraday’s Law of electromagnetic induction, the PST AB500 generates a magnetic field perpendicular to the flow direction; as conductive fluid passes through this field, a voltage proportional to average flow velocity is induced across two electrodes mounted diametrically in the pipe wall. This principle ensures zero pressure drop, insensitivity to fluid density, viscosity, temperature, or pressure fluctuations—and eliminates mechanical wear associated with turbine or positive displacement meters. Designed for long-term stability and minimal maintenance, the PST AB500 meets the functional safety and metrological requirements common in ISO 9001-certified production facilities and complies with IEC 61508 SIL 2 readiness for integration into safety instrumented systems (SIS) where applicable.
Key Features
- True bidirectional measurement capability with real-time flow direction indication and integrated reversal compensation logic
- Automatic empty-pipe detection and on-demand zero calibration—enabling reliable operation during intermittent flow or system start-up/shutdown cycles
- High immunity to electromagnetic interference (EMI) via dual-frequency excitation (6.25 Hz / 12.5 Hz), adaptive grounding design, and shielded signal processing circuitry
- Modular sensor-converter architecture supporting both integral and remote configurations—ideal for high-temperature, hazardous, or space-constrained installations
- Self-diagnostics covering electrode fouling detection, lining integrity verification, coil resistance monitoring, and signal-to-noise ratio assessment—all accessible via local display or digital interface
- Robust mechanical construction compliant with IP67 (integral) or IP68 (remote sensor), with optional explosion-proof certification (ATEX II 2G Ex d IIB T4 Gb / IECEx Ex d IIB T4 Gb)
Sample Compatibility & Compliance
The PST AB500 is validated for use with liquids exhibiting electrical conductivity ≥5 µS/cm—including aggressive media such as concentrated sulfuric acid, sodium hydroxide solutions, bleach, seawater, slurry suspensions (e.g., limestone, iron ore, fly ash), pulp stock, and wastewater effluents. Its electrode and liner material matrix enables chemical compatibility mapping per NACE MR0175/ISO 15156 and ASTM D1693 for stress cracking resistance. The device conforms to EN 14154-2 (water metering), EN 61326-1 (EMC for industrial environments), and supports audit-ready data integrity under FDA 21 CFR Part 11 when paired with GreenPrima’s certified FlowVision™ configuration software. It is routinely deployed in applications requiring adherence to ISO 5167, API RP 14L, and ASME BPE standards.
Software & Data Management
Configuration, calibration, and diagnostics are managed via GreenPrima’s FlowVision™ PC software (Windows-based), which provides full parameter access, firmware updates, event logging, and trend export in CSV or XML format. All configuration changes are timestamped and user-logged with role-based access control (admin/operator modes). Optional cloud connectivity (via GPRS module) enables remote monitoring, predictive maintenance alerts, and integration with SCADA, DCS, or MES platforms using standard OPC UA or MQTT protocols. Audit trails include full change history for parameters affecting measurement validity—supporting GLP/GMP documentation workflows and third-party regulatory inspections.
Applications
- Petrochemical refineries: Crude transfer lines, amine regeneration units, caustic injection circuits
- Chemical manufacturing: Batch reactor feed control, neutralization loop monitoring, solvent recovery systems
- Municipal water & wastewater: Influent/effluent metering, pump station optimization, leak detection networks
- Pulp & paper mills: Black liquor flow, white water recirculation, coating color dosing
- Food & beverage: CIP solution tracking, syrup blending, beer fermentation tank outflow
- Power generation: Cooling water intake, flue gas desulfurization (FGD) slurry circulation, demineralized water makeup
FAQ
What is the minimum conductivity required for accurate measurement?
The PST AB500 requires a minimum liquid conductivity of 5 µS/cm. Below this threshold, signal-to-noise ratio degrades significantly, compromising measurement stability.
Can the meter operate in high-temperature steam-saturated environments?
Yes—the remote sensor variant with PFA-lined titanium electrodes is rated for continuous service up to +250°C; ambient electronics housing must remain within –30°C to +65°C per specification.
Is MODBUS RTU communication galvanically isolated?
Yes—standard RS-485 MODBUS ports feature 1500 VAC galvanic isolation to prevent ground-loop interference in multi-node industrial networks.
Does the device support pulse output for totalization in legacy PLC systems?
Yes—configurable frequency/pulse output (0–10 kHz, open-collector or opto-isolated) is provided with programmable scaling factors and direction-sensitive counting.
How often does calibration verification need to be performed?
GreenPrima recommends annual verification against traceable flow standards per ISO/IEC 17025-accredited laboratories; however, built-in diagnostics and zero-check functionality allow extended intervals in stable, low-fouling applications.
