IoT Intelligent Remote Pressure Monitoring Terminal

1. Overview

The IoT Intelligent Remote Pressure Monitoring Terminal is a pressure data acquisition and remote transmission terminal device integrated with NB-IoT or 4G communication technology. Powered by a lithium battery, it enables timed collection, analysis, remote transmission, and alarm functions for pipeline pressure without requiring an external power supply. The IoT pressure monitoring terminal adopts a high-precision digital pressure sensor, offering advantages such as high accuracy, stable operation, low power consumption, and temperature compensation. It is reliable in quality, high-performing, and easy to install.

To meet the diverse on-site needs of users and provide higher cost-effectiveness, we have launched single-channel and dual-channel pressure monitoring terminals. Users can select the appropriate product based on their actual requirements.

This product complies with the standards GB/T 3836.1-2021 "Explosive Atmospheres-Part 1: Equipment General Requirements" and GB/T 3836.4-2021 "Explosive Atmospheres-Part 4: Equipment Protected by Intrinsic Safety 'i'." It carries the explosion-proof mark Ex ia IIB T4 Ga and is suitable for Zones 0, 1, and 2, in locations containing explosive gas mixtures of groups IIA to IIB and temperature classes T1 to T4. It has passed inspection by the National Quality Supervision and Testing Center for Explosion-Protected Electrical Products and has obtained explosion-proof certification.

2. Key Features

• Integrated with 4G or NB-IoT wireless communication IoT modules, the device enables seamless interaction and data exchange with remote meter reading systems or gas pipeline SCADA systems, with no communication distance limitations.

• It actively connects to the server at scheduled intervals, allowing flexible configuration of sampling cycles and upload intervals. Using short-connection technology, the device quickly enters sleep mode after each data exchange with the server, significantly reducing power consumption.

• The terminal features a built-in antenna design, ensuring reliable long-distance transmission while maintaining an aesthetically pleasing appearance.

• With an ultra-low power consumption design, the lithium battery life is guaranteed to last at least 4 years under default settings.

• The digital pressure sensor adopts an all-stainless steel structure and outputs signals via digital compensation, offering stable performance, high accuracy, low temperature drift, low power consumption, fast response, and strong anti-interference capability. At room temperature, the accuracy for 0–1 MPa reaches 0.05% FS, and for micro ranges (0–7 kPa) it reaches 0.2% FS. Across the full temperature range, accuracy for 0–1 MPa is guaranteed at 0.1% FS, and for micro ranges (0–7 kPa) at 0.5% FS.

• Equipped with a low-power pressure sensor, the terminal monitors pipeline pressure and temperature in real time, periodically saves and uploads pressure and temperature data, providing extensive operational data to support pipeline safety and gas distribution scheduling.

• The terminal can be preconfigured with alarm thresholds. It continuously monitors pressure and temperature values, and immediately uploads alarm information via IoT once thresholds are reached, delivering timely alerts for pipeline safety.

• Designed as an integrated unit, it is easy to install and maintain.

• The terminal includes an LCD screen, allowing users to configure the display of parameters such as gauge pressure according to their needs. It also shows temperature, atmospheric pressure, time, and other data for convenient verification against remotely transmitted information.

• With built-in Bluetooth functionality, users can configure and read terminal data on-site via a dedicated app, simplifying maintenance tasks.

• The terminal integrates a BeiDou positioning module. Once displacement is detected, it immediately reports a displacement alarm.

• The device supports remote firmware upgrades over IoT.

3. Specifications and Models

4. Technical Specifications

5. Exterior Composition

① Terminal Header      ② Magnetic/Touch-Sensitive Key Switch     ③ Pressure Sensor 1     ④ Pressure Sensor 2 (expandable for dual-channel operation)

6. Button Operations and Display

The device is equipped with either magnetic induction buttons or touch buttons. Pressing the button (for magnetic induction buttons, use a magnet near the K mark on the head of the device) triggers corresponding operations, while the LCD screen displays the relevant interface.

7. Parameter Settings

Parameters can be configured via the mobile APP or remote server. Note that when using the mobile APP for configuration, ensure environmental safety to prevent potential hazards caused by the mobile device.

8. Installation

8.1 Overall Dimensions

Unit: mm  

IoT Remote Pressure Monitoring Terminal (Sensor Not Included)

8.2 Product Installation and Commissioning

(1) Before installation, ensure that the actual pipeline pressure is within the pressure sensor's measurement range.

(2) Verify whether the installation thread of the pipeline pressure tap matches the pressure sensor. If they match, install directly using PTFE tape. If not, install via an adapter.

(3) After installation, perform a sealing check.  

(4) Confirm that the pressure displayed on the LCD screen is generally consistent with the actual pressure. Then, press the button or use a magnet to trigger the button at the marked "K" position on the gauge head to initiate immediate reporting. The on-site debugging is considered complete only after successful reporting.

(5) Device Fixing: For the integrated pressure monitoring terminal, install it directly onto the pipeline. For the separate pressure monitoring terminal, as shown in the figure below, first secure the terminal onto the bracket, then fix the bracket to a suitable wall using M8 expansion bolts, or secure the bracket to an appropriate pipeline or equipment using pipe clamps.

(6) If installing this product in an underground valve chamber, strictly follow the procedure below: Valve chamber operations must first comply strictly with the user’s safety regulations for working in valve chambers. System managers, installation, and maintenance personnel must be professionally trained and qualified. Maintenance personnel must possess knowledge of explosion safety and should operate in accordance with maintenance protocols and safety procedures. Before installation, submit a work plan for underground valve chamber operations to the relevant department and proceed only after approval. Form an installation team with at least 3 members before starting work.

1. Upon arriving at the installation site, first set up protective measures such as traffic cones.

2. Before entering the valve chamber, open the cover for ventilation. Test the gas concentration inside the chamber in the following order: oxygen, combustible gases, and toxic/hazardous gases. Entry is permitted only after test results meet safety standards.

3. During installation operations inside the valve chamber, continuously monitor the concentrations of oxygen, combustible gases, and toxic/hazardous gases. Assign a dedicated supervisor, and rotate personnel periodically during the operation.

4. Operators must correctly use safety protection equipment and personal protective equipment and maintain effective communication with the supervisor.

5. Operators must wear protective gear and fasten safety harnesses before entering the chamber. The specific installation and commissioning steps are the same as those for above-ground operations.

6. After completing the installation, remove all equipment and tools from the valve chamber. The supervisor must verify the headcount and equipment quantity to ensure no personnel or equipment are left inside. Then, close the chamber cover, clean the site, remove the barriers, and leave the area.

8.3 Installation Precautions

During installation, users shall adhere to the following precautions: The installation, operation, and maintenance of the terminal must comply with the relevant clauses of the following national standards:

• GB/T 3836.13-2021 Explosive atmospheres – Part 13: Equipment repair, overhaul, reclamation and modification

• GB/T 3836.15-2017 Explosive atmospheres – Part 15: Design, selection and erection of electrical installations

• GB/T 3836.16-2017 Explosive atmospheres – Part 16: Inspection and maintenance of electrical installations

• GB 50257-2014 Code for construction and acceptance of electrical apparatus installation engineering in explosive atmospheres and fire hazardous environments.

◆ Prevent the device from coming into contact with corrosive or overheated media.

◆ When used in combustible gas environments, replacement of components or structural modifications is not permitted, as this may affect the explosion-proof performance.

◆ Unauthorized disassembly or modification of the instrument/equipment is strictly prohibited.

◆ If battery replacement is required, use only the specified battery manufacturer and model. In hazardous locations, confirm the area is safe before opening the battery compartment housing. Battery replacement should be conducted in a well-ventilated area free from gas leakage, using the same battery model provided by our company.

◆ When used in flammable and explosive environments such as those with combustible gases, installation shall be carried out in accordance with GB/T 3836.15-2017 Explosive atmospheres- Part 15: Design, selection and erection of electrical installations. The explosion-proof marking is Ex ia IIB T4 Ga.

◆ Warning Label: Risk of potential electrostatic charge. To avoid ignition hazards caused by electro- static discharge during normal use, maintenance, and cleaning of the pressure monitoring terminal, the device should not be touched or wiped when used in an explosive atmosphere. If wiping or contact is necessary, it must be performed in a well-ventilated area confirmed to be free from gas leakage. Wipe the housing with a damp cloth that has been thoroughly wrung out.

◆ Dry cloth must not be used for wiping the housing.

9. Fault Analysis and Troubleshooting

Caution: If any on-site issues arise that cannot be resolved locally, please contact the supplier or our technical support team.

10. Quality Commitment

• One-Year Warranty (Full warranty coverage during the warranty period)

• Lifetime Maintenance (Within the service life of the IoT-based Pressure Monitoring Terminal)

11. Transportation and Storage

• Avoid severe impact during transportation and handling.

• Products must be transported and stored in their original packaging on shelves.

• Storage areas must be vibration-free, impact-free, and protected from rain.

• The storage environment should be clean and dry, with an ambient temperature of -30 °C to +60 °C and relative humidity not exceeding 95%.

• The air must be free of corrosive substances.

12. Unpacking and Inspection

Before opening the package, please inspect the external packaging for integrity. Verify the contents and accompanying documents against the packing list to ensure completeness.

1. Accompanying Documents  

2. Packing List  

3. User Manual  

4. Certificate of Conformity