The BT-4X5 Differential Pressure Transmitter with Display, developed by EMS Kontrol, is a high-precision measuring device designed for real-time monitoring of differential air pressure in HVAC systems, ventilation ducts, and controlled environments. Featuring a digital display for instant pressure readout, the BT-4X5 combines accuracy, durability, and user-friendly design to support energy-efficient airflow management and environmental control.

Function and Output Options
The BT-4X5 series utilizes a high-performance differential pressure sensor to measure the pressure difference between two air sources. The integrated LED display provides immediate feedback of the measured value in pascals. Depending on the model, the sensor signal is converted into standardized industrial output formats:

- BT 405: Analog 0–10V output

- BT 445: Analog 4–20mA output

- BT 465: Digital RS-485 Modbus RTU output

These output types ensure seamless compatibility with Building Management Systems (BMS), industrial control systems, and HVAC platforms, offering flexibility for both new system integration and retrofit applications.

Measurement Range and Accuracy
The BT-4X5 offers selectable differential pressure ranges including 0–1000 Pa, 0–5000 Pa, 0-10000 Pa, with a high sensitivity of ±10 Pa and measurement accuracy of ±0.5%, delivering dependable performance in airflow measurement and filter monitoring.

Construction and Installation
Designed for both performance and ease of use, the BT-4X5 is housed in an IP67-rated plastic enclosure (excluding sensor ports) that protects against dust and moisture. The integrated digital display is clearly visible and easy to read, while the compact form factor, dual pressure ports, and screw-mount design ensure straightforward installation in duct systems and air handling units.

BT 465 Differential Pressure Transmitter with Display – Technical Features

- Measuring Range: 0-1.000 Pa/ 0-5.000 Pa/ 0-10.000 Pa

- Accuracy: ±0.5%

- Sensitivity: ±10 Pa

- Modbus RTU Communication

- Supply Voltage: 12–24V DC

- Protection Class: IP67 (excluding sensor)

- Dimensions: 147 × 65 × 40 mm

The BT-4X5 Differential Pressure Transmitter with Display offers a reliable and efficient solution for real-time air pressure monitoring in HVAC and cleanroom applications. With multiple output options and a built-in display, it provides both visibility and control for engineers, facility managers, and automation professionals.