DA08 Differential Pressure Gauge for Filters and Ventilation | Fischer

Key Features: Fischer DA08 Differential Pressure Gauge

The Fischer DA08 is a mechanical differential pressure gauge designed to measure and indicate low differential pressures in neutral, non-aggressive, dry, oil-free and grease-free gases.

Its high sensitivity enables differential-pressure measurement from 0–6 mbar up to 0–100 mbar, making it particularly suitable for air-filter monitoring, fans, ventilation systems, air ducts and primary flow elements such as Venturi nozzles.

The DA08 uses a diaphragm capsule installed inside a pressure-resistant housing. The higher pressure acts on the inside of the capsule, while the lower pressure is applied to the outside. The deformation caused by the pressure difference is mechanically transferred to the indicating pointer.

As a fully mechanical instrument, it does not require an external power supply. This makes it a reliable local indicator for quickly checking pressure loss or ventilation-system performance.

The instrument features a 100 mm analogue dial, front-accessible zero-point adjustment and IP65 ingress protection. Its silicone-free construction makes it suitable for processes where silicone contamination must be avoided.

It can be wall-mounted or installed in a control panel. A range of process connections allows adaptation to rigid tubing, flexible hoses and threaded connections.

As a Fischer distributor, Garma Electrónica recommends the DA08 for applications requiring simple, stable local indication of low differential pressure without an analogue output or electrical power supply.

Main Specifications: Fischer DA08 Differential Pressure Gauge

• Measured variable: differential pressure.
• Media: neutral, dry, non-aggressive, oil-free and grease-free gases.
• Measuring principle: diaphragm capsule with mechanical pointer transmission.
• Ranges in mbar: 0–6, 0–10, 0–16, 0–25, 0–40, 0–60 and 0–100 mbar.
• Ranges in pascals: 0–600, 0–1000, 0–1600, 0–2500 and 0–4000 Pa.
• Maximum system pressure: 200 mbar or 20 kPa.
• Maximum durability: between 60 and 200 mbar, depending on the selected range.
• Display accuracy: class 1.6 according to DIN EN 837.
• Indication: 100 mm analogue dial.
• Scale angle: 162°, 169° or 270°, depending on measuring range.
• Zero-point adjustment: accessible from the front.
• Power supply: not required.
• Output: local mechanical indication.
• Ingress protection: IP65 according to DIN EN 60529.
• Ambient temperature: −20 to +70°C.
• Storage temperature: −20 to +80°C.
• Maximum medium temperature: 50°C.
• Special feature: silicone-free construction.
• Measuring-system materials: brass and copper beryllium.
• Housing: painted aluminium.
• Front window: acrylic glass.
• Approximate dimensions: 118 × 118 × 61 mm, depending on connection.
• Weight: approximately 650 g.
• Mounting: wall or panel mounting.

Applications and Benefits: Fischer DA08 Differential Pressure Gauge

Air-Filter Monitoring

The DA08 measures the pressure difference upstream and downstream of an air filter. As contamination accumulates, pressure loss increases and the pointer provides a clear visual indication of the filter condition.

This enables filters to be replaced according to their actual condition, avoiding both premature replacement and prolonged operation with an excessively contaminated filter.

Roller-Band Filters and Filtration Systems

Its sensitivity to low differential pressures makes it suitable for monitoring roller-band filters, prefilters and other filtration systems used in ventilation and air-treatment installations.

Fan Monitoring

Differential-pressure measurement can confirm whether a fan is producing the expected pressure. An abnormal reduction or variation may indicate a malfunction, blockage, wear or change in airflow.

Ventilation and Air-Handling Systems

The Fischer DA08 can be installed in air ducts, ventilation units and air-handling equipment to display the pressure difference between two points in the system.

Because no power supply is required, it provides a simple permanent visual reference close to the monitored filter or equipment.

Flow Measurement with Venturi Nozzles

When combined with a Venturi nozzle or another primary flow element, the DA08 can display the differential pressure generated by airflow. This pressure difference can be used as an indirect indication of flow rate.

Air-Duct Pressure Monitoring

The gauge can compare pressure at different points in an air duct, identify pressure losses and verify the operation of dampers, grilles and ventilation components.

Applications Without Electrical Power

Its mechanical measuring principle makes it suitable for installations where no power supply is available or where a local indication independent of the automation system is preferred.

Silicone-Free Processes

The silicone-free construction extends its suitability to industrial processes where silicone could cause contamination, affect surface finishing or conflict with production requirements.

Technical Advantages of the Fischer DA08

• Sensitive measurement of low differential pressures.
• Minimum range of 0–6 mbar or 0–600 Pa.
• Mechanical indication without an electrical power supply.
• 100 mm dial for clear local reading.
• Front-accessible zero-point adjustment.
• IP65 ingress protection for industrial installations.
• Silicone-free construction.
• Wall or panel mounting.
• Multiple connections for rigid tubing and flexible hose.
• Simple operation and low maintenance requirements.

Connection and Mounting Options

• G¼ female thread.
• G¼ male connection.
• G½ male connection.
• Cutting-ring fitting for 6 mm tubing.
• Cutting-ring fitting for 8 mm tubing.
• Cutting-ring fitting for 10 mm tubing.
• Quick hose connection for 6/4 mm hose.
• Quick hose connection for 8/6 mm hose.
• Bottom connections for wall mounting.
• Bottom or rear connections for panel mounting.

Information Required to Select the Fischer DA08

The following application data should be defined before selecting the gauge:

• Minimum and maximum differential-pressure range.
• Required display unit: Pa or mbar.
• Maximum system pressure.
• Gas type and composition.
• Presence of oil, grease, moisture or particles.
• Medium and ambient temperature.
• Wall or panel mounting.
• Bottom or rear process connections.
• Tube or hose type and diameter.
• Requirement for a silicone-free process.

Garma Electrónica provides technical support for selecting the correct range, measuring unit, process connection and mounting arrangement for each differential-pressure application.