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EVC Series Volume Corrector – Intelligent Gas Flow Totalizer with IoT
The EVC series volume corrector is an economical intelligent secondary instrument designed for gas flowmeters. Integrating digital temperature and pressure sensors via I²C interface, it automatically converts working condition gas volume to standard condition volume with temperature, pressure, and compressibility factor compensation.
Key Features
Accuracy class 0.5 – Maximum comprehensive error ±0.5%
Digital sensors – Independent temperature (±0.3°C) and pressure (±0.2%) sensors, separately calibratable
8-segment meter factor correction – Linear compensation for improved accuracy
IoT ready – Embedded wireless communication module (4G/NB-IoT) for remote data transmission
Dual battery system – 7.2V main battery for IoT + 3.6V backup for metering, up to 5 years life
Full electrical isolation – All outputs isolated from CPU for anti-interference
Anti-tampering – Magnetic interference detection and alarm
Password protection – Key parameters secured
ExiaIICT4Ga – Intrinsically safe explosion-proof
IP66 – Weatherproof enclosure
Technical Specifications
| Parameter | Value |
|---|---|
| Accuracy class | 0.5 |
| Pressure error (≥20% Pmax) | ±0.2% |
| Temperature error | ±0.3°C |
| Pressure ranges | 0.5, 1.0, 2.0, 5.0, 10.0 MPa |
| Ambient temperature | -25°C to +60°C |
| Medium temperature range | -30°C to +80°C |
| Input signals | Pulse (0-5kHz) + I²C digital sensors |
| Outputs | Pulse (5 options), 4-20mA, RS485, alarm |
| Data storage | 720 min / 9000 hour / 2000 daily / 120 monthly records |
| Event logging | Parameter changes, faults, alarms, magnetic attack, cover opening |
| Power supply (external) | 9-24 Vdc |
| Power consumption | <2.5W (external), <1.5mW (internal battery, no IoT) |
| Battery life | >5 years (metering only), ~3 years (IoT, 2x daily communication) |
| Explosion-proof mark | ExiaIICT4Ga |
| Protection rating | IP66 |
Applications
City gas metering systems
Petrochemical industry gas measurement
Metallurgical industry gas flow monitoring
Gas flowmeter integration (turbine, roots, vortex, ultrasonic)
Custody transfer billing applications
Ordering Information
Users should specify model, pressure sensor range, output requirements, and IoT option when ordering.
