QBM2030

The Siemens QBM2030 series differential pressure sensor features a DC 0-10V analog output, AC 24V or DC 13.5-33V power supply, a total error of less than ±3%FS, IP42 protection rating, and an operating temperature of 0~70°C. It comes with a plastic pressure connector and a 2-meter duct probe, making it suitable for HVAC duct differential pressure and airflow detection, as well as filter and fan monitoring applications.

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Siemens QBM2030 series differential pressure sensor, used for differential pressure measurement in HVAC ducts.

Product Positioning

The QBM2030 is a differential pressure sensor from the Siemens SYMARO series, used to measure minute pressure differences in HVAC ducts. It is widely used in airflow detection, filter blockage monitoring, and fan control, and is a common field sensing element in building automation systems.

Core Product Advantages and Features

DIP switch selectable measurement range

Multiple measurement ranges are available depending on the model suffix and can be switched to adapt to different duct differential pressure measurement needs (see the specification table below for details).

DC 0-10V analog output

It outputs a standard DC 0-10V signal and can be directly connected to a DDC controller or BAS system for monitoring.

Dual power supply compatible design

Supports AC24V±15% 50/60Hz or DC13.5-33V power supply, with power consumption below 0.5VA.

High-precision measurement

The total error is less than ±3%FS at 20°C, the temperature coefficient is extremely low, and the measurement is stable and reliable.

Complete accessories and protection level

Includes a Ø6.2mm plastic pressure fitting, a 2-meter duct probe, and a Pg11 cable connector; IP42 protection rating.

project	Specification
Product Series	Siemens SYMARO QBM2030 Series Differential Pressure Sensor
Measurement range QBM2030-1U	±50 / ±100 / 0…100 Pa (DIP switch selection)
Measurement range QBM2030-5	0…200 / 0…250 / 0…500 Pa (DIP switch selection)
Measurement range QBM2030-30	0…1000 / 0…1500 / 0…3000 Pa (DIP switch selection)
Output signal	DC 0…10V
Power supply voltage	AC 24V±15% 50/60Hz, or DC 13.5…33V (SELV/PELV), power consumption <0.5VA
Accuracy	Total error at 20°C < ±3%FS; zero-point temperature coefficient < ±0.1%FS/°C
Connection method	Terminal wiring (≤1.5mm²), Pg11 cable connector, Ø6.2mm plastic pressure connector + 2-meter duct probe (ABS)
Protection level	IP42 (EN 60529), Protection Class III (EN 60730-1)
Operating temperature	0…+70°C (Storage and transport temperature -25…+70°C)
Application scenarios	HVAC duct differential pressure measurement, airflow detection, filter monitoring, and fan control.

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