YD-221WL/YD-221WA2 Series Wireless Differential Pressure Transmitter: Industrial Process Remote Differential Pressure Monitoring Solution

In industrial pipeline systems, filtration and separation equipment, and storage tank liquid level differential pressure monitoring, traditional wired differential pressure transmitters often face problems such as complex wiring, high maintenance costs, and difficulties in remote data acquisition. The Nexisense YD-221WL/YD-221WA2 series intelligent wireless differential pressure transmitter takes an advanced industrial-grade MCU as the core, paired with high-quality monocrystalline silicon or diffusion silicon sensors, and integrates LoRa or CAT1 IoT communication modules to achieve low-power wireless transmission of on-site differential pressure data. This series supports timed upload and abnormal alarm modes, adopts industrial explosion-proof housing and multi-point temperature compensation technology to ensure stable and reliable data, and is widely applicable to large-scale process control projects in petrochemical, water supply and drainage, and environmental protection treatment fields.

Product Core Technical Parameters and Design Advantages

The YD-221 series wireless differential pressure transmitter uses monocrystalline silicon or diffusion silicon core as the acquisition front-end, achieving high-precision measurement through precise signal processing and temperature compensation. The product is divided into LoRa version (YD-221WL) and CAT1 4G version (YD-221WA2) to meet different transmission distance and real-time requirements.

The main technical parameters include:

• Measuring Range: Monocrystalline silicon static pressure up to 40MPa, differential pressure between 0-40MPa; diffusion silicon static pressure is 2 times the differential pressure, range 0-2MPa

• Accuracy Grade: 0.5%FS, customizable to 0.2%FS, 0.1%FS

• Display Method: 5-digit digital LCD local display, convenient for on-site zero and range debugging

• Transmission Method: LoRa ISM band (433MHz, 868MHz, 915MHz, etc.) or CAT1 4G network, supports timed upload and alarm triggered upload

• Transmission Distance: LoRa can reach 2-5km in urban environment (depending on gateway configuration)

• Operating Frequency: ISM band, supports IEEE 802.15.4g standard

• Capacity: A single LoRa gateway can connect thousands to tens of thousands of nodes

• Operating Temperature: -10℃～60℃, ambient humidity ≤80%RH

• Installation Method: M20×1.5 external thread, supports customization of various thread specifications such as G1/2, G1/4, 1/4NPT

• Additional Functions: Reverse polarity protection, current limiting protection, lightning protection, shock resistance, multi-point temperature compensation (temperature compensated version optional), communication average current 100mA@3.6VDC, standby current 20uA@3.6VDC

The product housing adopts industrial explosion-proof design, with small size, beautiful appearance and high cost performance. High stability in sensor processing ensures long-term measurement consistency. Local LCD display and infrared or button debugging methods further improve on-site operation and maintenance convenience. The CAT1 version relies on China Telecom 4G network to achieve direct cloud connection, while the LoRa version is suitable for self-built private networks or dense multi-node deployment scenarios.

Typical Application Scenarios

The YD-221 series wireless differential pressure transmitter is particularly suitable for industrial process control projects that require remote monitoring of differential pressure or liquid level difference.

In the petrochemical and pipeline transportation fields, the product can be installed at key pipeline nodes, both ends of filters or heat exchanger inlet/outlet to achieve real-time differential pressure monitoring and blockage alarm, supporting docking with SCADA systems to ensure safe pipeline operation.

In municipal water supply and sewage treatment, the transmitter is suitable for differential pressure monitoring of filter tanks, sedimentation tanks or pump stations, helping to determine the degree of filter material blockage, optimize backwash cycles, reduce energy consumption and improve treatment efficiency.

Environmental protection and industrial gas treatment projects often face dust, steam or corrosive media environments. The impact-resistant design and temperature compensation function of the YD-221 series ensure stable measurement under harsh working conditions, providing reliable data for differential pressure control of flue gas desulfurization and dust removal equipment.

In addition, in scenarios such as storage tank liquid level differential pressure measurement, fan differential pressure monitoring and pharmaceutical process filtration systems, the product supports distributed deployment, with data uniformly uploaded to cloud platforms or local monitoring centers, achieving multi-point centralized management and timely detection of abnormalities. In actual engineering, many system integrators have applied this series of products to smart factory and environmental monitoring platforms, significantly reducing on-site inspection frequency and maintenance costs.

Selection Guide

To ensure the product achieves optimal performance in specific projects, purchasers can refer to the following selection points:

1. Sensor type selection: For high static pressure and large differential pressure occasions, monocrystalline silicon core is preferred; for medium and low pressure ranges or cost-sensitive projects, diffusion silicon version can be selected.

2. Accuracy and range matching: For conventional process monitoring, 0.5%FS accuracy is recommended; for precision control or metering applications, customized 0.2% or 0.1%FS high-precision versions are recommended, and appropriate margin should be reserved according to the actual differential pressure range.

3. Communication method determination: For scenarios with long transmission distance or self-built networks, choose the LoRa version; for projects requiring direct access to public networks and higher real-time performance, the CAT1 4G version is recommended.

4. Environment and installation conditions: Evaluate on-site temperature, humidity, medium type (liquid, gas, steam) and explosion-proof requirements, and select appropriate temperature compensation configuration and thread interface.

5. Functional requirements: For occasions requiring local real-time data viewing, prioritize models with LCD display; for high-risk pipeline monitoring, focus on alarm triggered upload function.

Before purchase, provide detailed working condition parameters (differential pressure range, static pressure value, medium, installation location, network conditions, etc.), and the technical team can recommend the optimal configuration and assist in prototype verification.

Integration Precautions and System Compatibility

The YD-221 series design focuses on engineering integration convenience and supports docking with mainstream industrial automation and IoT platforms.

• Communication Integration: The LoRa version achieves data aggregation through gateways, supporting thousands of nodes capacity; the CAT1 version uses TCP/IP protocol for direct transparent transmission to specified servers or cloud platforms. Data format is flexible, customizable protocols or encryption, convenient for integration with PLC, DCS, SCADA or host computer software.

• Power Supply and Low Power Management: Supports battery or external power supply, standby current as low as 20uA. Reasonable setting of upload intervals and alarm thresholds can optimize energy consumption, with CAT1 version communication current controlled at about 100mA.

• Installation and Debugging: Thread interfaces are standardized. During installation, ensure correct connection between the sensor and the measured medium to avoid stress affecting the sensor. On-site use LCD display or debugging tools to complete zero point, range adjustment and parameter settings (IP address, port, alarm value, etc.). After debugging, perform end-to-end testing to verify measurement accuracy and transmission stability.

• Reliability Assurance: The product has reverse polarity protection, lightning protection and shock resistance. When the network is abnormal, it supports local data caching and automatic retransmission after recovery. In complex environments, it is recommended to configure redundant gateways or system-level data verification mechanisms.

During integration, pay attention to electromagnetic compatibility and keep the installation location away from strong interference sources. If necessary, edge computing gateways can be combined to achieve protocol conversion and local preprocessing.

OEM Customization and Bulk Supply Advantages

Nexisense is committed to providing flexible cooperation modes for system integrators, engineering companies and OEM manufacturers. The YD-221 series supports deep customization, including sensor core selection, range and accuracy optimization, communication module adaptation (LoRa/CAT1), shell material, thread specifications, protocol development and brand identification adjustment.

Bulk supply can enjoy stable supply chain guarantee, optimized delivery cycle and technical support services. The company has accumulated rich experience in industrial process monitoring projects and can quickly respond to customer bidding or engineering needs, providing supporting services from prototype verification to large-scale deployment.

FAQ

1. What is the maximum differential pressure measuring range supported by the Nexisense YD-221 series wireless differential pressure transmitter?
   A: The monocrystalline silicon version supports differential pressure 0-40MPa (static pressure up to 40MPa), and the diffusion silicon version has a range of 0-2MPa. Specific range can be customized according to project requirements.

2. How is the accuracy grade of this series? In which engineering scenarios are high-precision versions applicable?
   A: Basic accuracy 0.5%FS, supports customization to 0.2%FS or 0.1%FS high-precision versions, suitable for precision filtration control, metering settlement or high-requirement process monitoring projects.

3. What are the applicable scenarios for LoRa and CAT1 communication methods?
   A: LoRa is suitable for self-built private networks, dense multi-node deployment, and transmission distance of 2-5km; CAT1 4G is suitable for projects that need direct access to public networks, higher real-time performance or wide-area coverage.

4. How does the product realize abnormal pressure alarm and timely upload?
   A: Supports timed upload and value alarm modes. When differential pressure exceeds the preset threshold, data upload is automatically triggered to ensure timely detection of pipeline or equipment safety status.

5. How do local LCD display and debugging functions improve on-site operation and maintenance efficiency?
   A: 5-digit digital display can view current differential pressure value in real time. On-site zero point and range adjustment can be completed through buttons or tools without frequent disassembly of the device, significantly reducing maintenance difficulty.

6. What engineering points should be noted when installing the wireless differential pressure transmitter?
   A: Thread interface must be correctly connected to avoid installation stress affecting the sensor; pressure tapping port location should avoid turbulence or blockage; outdoor installation needs to consider lightning protection and protective measures to ensure seal integrity.

7. Does it support OEM/ODM customization? What are the practical advantages of bulk procurement?
   A: Supports deep customization of sensor type, communication protocol, appearance identification and functional modules. Bulk supply can provide more competitive delivery, technical supporting services and cost optimization.

8. How is the long-term stability of the product guaranteed in high temperature, high pressure or corrosive media environments?
   A: Adopts industrial explosion-proof housing, multi-point temperature compensation technology and high-quality core, combined with shock resistance and lightning protection design, ensuring reliability and measurement consistency under complex working conditions.

Summary

The Nexisense YD-221WL/YD-221WA2 series wireless differential pressure transmitter provides an efficient remote solution for pipeline differential pressure, filter monitoring and process control projects with its high-precision sensor, multiple communication method options, low-power design and industrial-grade reliability. Its wireless architecture effectively reduces wiring and maintenance costs, and local display and alarm functions further improve system safety and operation and maintenance convenience.

As a supplier specializing in industrial IoT sensors, we look forward to in-depth cooperation with system integrators, chemical environmental protection and smart water projects to jointly build stable and reliable process monitoring systems. If you are planning or optimizing differential pressure related automation projects, please feel free to contact the Nexisense technical team, provide detailed working condition parameters, and we will provide targeted product configuration, technical solutions and bulk cooperation support.