General Overview of the DP101 Series Differential Air Pressure Sensor

The DP101 Series Differential Pressure Sensor, distributed by Cabitek, is a premium differential pressure transmitter specifically designed for air and dry gas applications. The device measures the pressure difference between two points in a duct system or between two separate spaces, then converts the measured value into a standard electrical output signal for transmission to the central control system.

The product features a compact, aesthetically pleasing design with a durable ABS plastic housing. Its intelligent design allows users to optionally integrate an LCD display for direct on-site monitoring, making local data observation faster and more convenient than ever.

Robust and Safe Hardware Design

The device is optimally designed with convenient pressure tube connection ports and a sealed cable gland for waterproof wiring. The internal circuit board is built with high-quality electronic components and includes comprehensive overvoltage protection as well as reverse power/output protection. As a result, the risk of damage caused by wiring mistakes or sudden voltage surges is minimized.

In particular, the DP101 housing is rated IP65, providing excellent protection against dust and water ingress, allowing the device to operate reliably even in harsh industrial environments.

Technical Features and Key Advantages

The DP101 Series Differential Air Pressure Sensor stands out thanks to numerous outstanding technical advantages:

• High accuracy and excellent noise immunity: The device offers an accuracy of ±3%, ensuring reliable measurement data for industrial automation systems.
• Adjustable response time: The response time can be configured via a DIP switch to either 1 second or 5 seconds, depending on application requirements (overall response time less than 15 seconds).
• Built-in Zero Calibration button: During long-term operation, zero drift may occur due to environmental influences. The device is equipped with a dedicated Zero calibration button, allowing users to restore measurement accuracy within seconds.
• Multiple output options: Supports the most common industrial output standards, including 0–10 VDC analog output, 4–20 mA analog output, and Modbus RTU (RS485) communication.
• Optional Relay outputs: The device can be configured with up to 2 relay outputs. These relays support independent alarm setpoints or Hysteresis window control, enabling stable switching of external equipment while extending service life.

Detailed Technical Specifications of the DP101 Series

Below are the comprehensive technical specifications of the DP101 Series:

DP101 Series Differential Pressure Sensor Configuration

Zero Calibration

Press and hold the BT2 (or BT) button for 2 to 5 seconds. When the green LED lights up or the display shows “Done”, the calibration process is complete.

DIP Switch Configuration

Switches 1, 2, and 3 are used to select one of eight sub-ranges, while Switch 4 selects the response time of 1 second or 5 seconds.

Practical Industrial Applications of the DP101 Series

Thanks to its ability to accurately measure extremely low differential pressure, the DP101 Series Differential Air Pressure Sensor is widely used across numerous industries:

• HVAC system monitoring and control: In commercial buildings and industrial facilities, the sensor is used to measure supply and return air pressure, allowing the central controller to automatically balance airflow and optimize ventilation fan energy consumption.
• Air filter monitoring: In AHU systems, air filters gradually become clogged over time. The DP101 continuously measures the pressure difference across the filter. When the differential pressure exceeds the preset threshold, the device generates an alarm indicating that the filter requires cleaning or replacement.
• Cleanroom pressure control: In operating rooms, pharmaceutical manufacturing facilities, and semiconductor production plants, maintaining positive or negative pressure is essential to prevent contamination. The differential pressure sensor continuously monitors the pressure difference between the cleanroom and the surrounding corridor.

DP101 Series Ordering Guide

The base model is DP101-. Select the pressure range 0 to 4, corresponding to ±250 Pa, 1,000 Pa, ±1,000 Pa, 2,000 Pa, or ±2,000 Pa. Next, select the required options for analog outputs (None, 0–10 VDC, or 4–20 mA), Modbus, LCD display, and relay outputs. Relay outputs are available only when the LCD option is selected.

Example: DP101-3-1-1-1-1-1

DP101 Series Installation and Wiring

• When using RS485 communication with an AC power supply, an isolated 24 VAC power source must be used.
• Mount the DP101 vertically on the wall with the pressure ports facing downward.
• Avoid installation near heat sources, cold air sources, direct sunlight, or rain. Install a protective cover if necessary.
• Drill two mounting holes according to the dimensional drawing and secure the base using two screws.

Where to Buy the DP101 Series Differential Air Pressure Sensor?

Cabitek is one of Vietnam’s leading suppliers of industrial sensing and automation measurement solutions. When purchasing the DP101 Series Differential Air Pressure Sensor from CABITEK, customers can be completely confident in both product quality and after-sales support:

• 100% genuine products with complete CO/CQ documentation.
• Experienced engineering team providing accurate product configuration consultation.
• Competitive pricing with long-term warranty policies.
• Professional technical support throughout installation and operation.

Conclusion

The DP101 Series Differential Air Pressure Sensor is an ideal solution for industrial facilities and commercial buildings seeking an accurate, flexible, and reliable differential pressure monitoring system. With its IP65-rated enclosure, flexible measuring range configuration via DIP Switch, and multiple output options including 4–20 mA, 0–10 V, and Modbus RTU, the device simplifies pressure monitoring while helping optimize overall system operating costs.