Energy & Gas Injection Facility Monitoring

PnP IoTs supplied an RTU and 4-20mA input modules for a gas management facility that needed to collect differential pressure sensor data and transfer the values to an external server.

Project Overview

The customer needed a practical way to check whether gas was being safely stored and managed at the facility. The core requirement was to read industrial sensor signals, confirm communication status, and send the collected data to the customer’s server through TCP/IP communication.

Instead of replacing the existing field sensors or safety equipment, the project focused on converting standard 4-20mA industrial signals into usable monitoring data. This made the system suitable for gas and energy sites where existing equipment compatibility and field reliability are important.

Customer Requirement

• Collect differential pressure sensor values from the gas management facility.
• Convert 4-20mA industrial signals into digital monitoring data.
• Transfer the collected data to an external server through Wi-Fi / TCP-IP communication.
• Check sensor values and communication status from the connected system.
• Keep the on-site installation and server-side program flexible for the customer’s own integration work.

PnP IoTs Solution

PnP IoTs supplied the RTU and 4-20mA input modules, and provided technical consultation for the integration. The gas management company handled the on-site installation and server programming, while the PnP IoTs equipment collected sensor values and transmitted the data to the server.

System Flow

1. Differential pressure sensors output 4-20mA industrial signals.
2. SB0-420 modules receive and convert the analog current signals.
3. PD-AWS-P8 RTU collects the converted values from the modules.
4. The RTU transfers sensor data and communication status to the external server.
5. The customer can use the server-side system to monitor and manage the facility data.

Operational Value

1. Use Existing Industrial Sensor Signals

Many gas and energy facilities already use sensors, alarm panels, or control equipment. This project shows that standard 4-20mA signals can be collected without redesigning the entire site. The monitoring system can be added as a data acquisition layer alongside existing equipment.

2. Improve Remote Checking and Response

When pressure or gas management signals are transferred to a server, operators can check the site condition remotely before dispatching personnel. This helps reduce unnecessary field visits and supports faster response when abnormal values or communication issues occur.

3. Build a Data Basis for Safety and Maintenance

Collected data can be used not only for real-time monitoring but also for maintenance planning, repeated abnormal-event analysis, and facility improvement decisions. For gas-related sites, this is valuable because safety management, inspection history, and response records are important operational evidence.

Applicable Expansion Areas

• Gas concentration and alarm contact monitoring
• Pressure, flow, valve status, and tank level monitoring
• Remote checking of gas supply facilities and small stations
• Integration with PLC, Modbus, RS485, or existing control systems
• Dashboard, alarm, and monthly report functions for facility operators

Why This Case Matters

This installation demonstrates how PnP IoTs can connect field-level industrial sensor signals to an IoT monitoring system. For gas suppliers, energy facilities, and industrial safety sites, the key value is not simply installing a new device. The value is making existing field signals visible, recordable, and usable for safer operation.

With RTU, 4-20mA input modules, and communication integration, PnP IoTs can help customers build practical monitoring systems for gas management, pressure data, facility status, and safety-related field signals.