DE25 Differential Pressure Transmitter for HVAC and Filter Monitoring | Fischer

Key Features: Fischer DE25 Differential Pressure Transmitter

The Fischer DE25 is a digital differential pressure transmitter designed for accurate measurement of positive pressure, negative pressure and differential pressure in neutral, non-aggressive gases. Its piezoresistive silicon diaphragm sensor provides excellent long-term stability, high sensitivity and reliable performance in low-pressure applications.

Available with measuring ranges from 2.5 mbar up to 100 mbar, the DE25 is an ideal solution for HVAC systems, ventilation equipment, filter monitoring, building automation and industrial air pressure measurement.

Its compact design, IP65 protection, silicone-free construction and analogue current or voltage outputs allow easy integration into PLCs, BMS systems and industrial automation equipment.

As an official Fischer distributor, Garma Electrónica recommends the DE25 whenever reliable low differential pressure measurement is required with an excellent balance between accuracy, robustness and cost.

Main Specifications: Fischer DE25 Differential Pressure Transmitter

• Measured variable: differential pressure, positive pressure and negative pressure.
• Medium: neutral, non-aggressive gases.
• Measuring ranges: 2.5 mbar, 4 mbar, 6 mbar, 10 mbar, 25 mbar, 40 mbar, 60 mbar and up to 100 mbar.
• Measuring principle: piezoresistive silicon diaphragm sensor.
• Analogue outputs: 4–20 mA, 0–20 mA, 0–10 V or 2–10 V depending on version.
• Power supply: 24 V AC/DC.
• Protection rating: IP65.
• Construction: silicone-free.
• Mounting: wall mounting.
• Maintenance: maintenance-free design.

Applications and Benefits: Fischer DE25 Differential Pressure Transmitter

HVAC Control

The DE25 accurately measures differential pressure in HVAC, ventilation and air-conditioning systems, ensuring efficient fan operation and reliable air handling performance.

Filter Monitoring

Continuous pressure-drop measurement allows filter contamination to be detected early, improving predictive maintenance and reducing operating costs.

Building Automation

Its analogue outputs enable seamless integration with PLCs, BMS and industrial automation systems for continuous pressure monitoring.

Industrial Process Applications

The DE25 is well suited for machinery, process engineering, test benches and industrial applications requiring stable measurement of low differential pressures in gaseous media.

Competitive Advantages

The Fischer DE25 combines piezoresistive sensing technology, high sensitivity, IP65 protection, silicone-free construction and maintenance-free operation, making it an excellent solution for HVAC, filtration and industrial automation applications requiring reliable differential pressure measurement.