As part of our expanding partnership with EBM Papst, iACS is now offering an advanced range of EBM Papst differential pressure sensors, designed for precision airflow monitoring and control in HVAC systems. Engineered for clean air applications, these sensors convert a pressure differential into a 0–10 VDC output signal—making them ideal for closed‑loop control of EC fans, filter monitoring, and room pressurisation.

 

This blog explores the SN1120 and SN1121 sensor series, explaining the benefits of each pressure range, practical applications, and why these sensors should be specified over competitor products.


Why EBM Papst Differential Pressure Sensors Excel

EBM Papst sensors stand out due to the following features:

  • High‑quality mass‑flow module provides linear and accurate 0–10 VDC output with no offset, no zero‑point drift, and hysteresis-free operation.

  • Fully calibrated at the factory for Air and N₂, with temperature compensation across wide ranges.

  • Wide supply voltage range (9.5 to 57 V DC) with reverse-polarity protection and low power draw (~10 mA).

  • ±3 % full-scale accuracy and robust enclosures (IP54 for SN1120, IP30 for SN1121).

  • Seamless compatibility with EBM Papst EC fans, controllers, and BMS systems.

                   Refrigerant pressure controller for EBM Papst EC fans, black housing with brass pressure port.


Product Range at iACS – Available via Our Store

iACS stocks the full range of EBM Papst SN1120 and SN1121 sensors in various calibrated spans:


Detailed Benefits & Applications by Product

SN1120 Series (0–50 / 100 / 200 / 500 Pa)

EBM Papst SN1120-A500 differential pressure sensor with tubing connected 0500 Pa range

These models are ideal for low-pressure applications such as filter monitoring, duct airflow measurement, and clean-room pressure control.

Available Models:

Use Cases:

  • HVAC filter status monitoring

  • Room pressurisation

  • Low-static pressure duct airflow control

Why Choose SN1120?

Compared to cheaper sensors, SN1120 models offer:

  • Factory calibration

  • Hysteresis-free accuracy

  • IP54-rated enclosure

  • Zero drift over time


SN1121 Series (0–500 / 1000 / 2000 / 3500 Pa)

Built for more demanding applications requiring high differential pressure readings.

EBM Papst SN1121-A1000 differential pressure sensor, 01000 Pa range, with connected tubing

Available Models:

Use Cases:

  • Fan inlet pressure measurement

  • Monitoring large duct static pressure

  • HEPA/carbon filter monitoring

  • Constant airflow control via EC fans

Why Choose SN1121?

SN1121 models:

  • Maintain linear, high-range pressure outputs

  • Are temperature-compensated across –10 °C to +60 °C

  • Are ideal for industrial EC fan applications

  • Offer high performance without the high price of digital alternatives


Shared Advantages of EBM Papst Sensors

  • No offset drift or hysteresis

  • Accurate 0–10 V output for EC fan integration

  • Wide voltage range and reverse polarity protection

  • Factory calibrated – no field adjustment required

  • Lightweight, compact, and easy to install

  • Seamless compatibility with EBM Papst EC fan controllers


Installation Best Practices

  • Keep tubing length short (<0.5 m) to minimise deviation

  • Mount on stable surfaces away from heat sources

  • Power using 9.5–57 V DC

  • Wire 0–10 V output to fan controller or BMS

  • Use for closed-loop control with constant airflow or pressure setpoints


Why Buy EBM Papst Sensors from iACS?

iACS offers:

Explore our full sensor offering:


Precision Monitoring Starts with the Right Sensor

When it comes to reliable, accurate airflow monitoring, EBM Papst differential pressure sensors offer outstanding value. Whether you're working with low-pressure cleanroom systems or high-volume air handling units, these sensors deliver the data and performance required for modern HVAC control.

Order now via iACS:

Need help choosing the right sensor? Contact our technical team for expert advice and support.