---

FEMA DGM Pressure Monitors for Fuel Gases

FEMA DGM pressure monitors are used for reliable monitoring of fuel gas pressure in gas-carrying systems. They switch as soon as a defined pressure limit is reached, making them suitable for monitoring, control and safety functions in gas supply systems, burner systems, heating systems and industrial process plants.

The DGM series is designed as a pressure monitor for fuel gases according to DIN EN 1854. Depending on the type, different setting ranges are available, for example 15–60 mbar, 20–100 mbar, 40–160 mbar, 40–250 mbar, 100–250 mbar, 100–600 mbar or 0.2–1.6 bar. This allows both low gas pressures and higher pressure ranges in industrial applications to be monitored.

The switching differential of the DGM pressure monitors is not adjustable. Depending on the version, variants with gold-plated contacts, terminal connection, plastic-coated housing, service function or Ex-i suitability are available. This allows the appropriate pressure monitor to be selected according to electrical integration, ambient conditions and safety-related requirements.

The devices operate mechanically and require no additional auxiliary power for pressure detection itself. The applied gas pressure acts on a measuring element, which actuates a microswitch. The resulting switching signal can be used for release, shutdown, alarm or lockout functions within the system control.

Typical Applications

• Pressure monitoring in fuel gas lines
• Monitoring of gas supply systems and gas pressure regulating lines
• Burner controls in heating and process plants
• Minimum and maximum pressure monitoring for fuel gases
• Safety shutdown in case of inadmissible gas pressure
• Industrial firing systems and heat generators
• Applications according to DIN EN 1854

Advantages of FEMA DGM Pressure Monitors

• Designed for fuel gases: pressure monitor for gas-carrying systems according to DIN EN 1854
• Wide type selection: different setting ranges from mbar to bar available
• Mechanical switching principle: no auxiliary power required for pressure detection
• Fixed switching differential: robust and clearly defined switching function
• Optional special versions: depending on the type, available with gold-plated contacts, service function or terminal connection
• Ex-i versions available: suitable for intrinsically safe circuits in corresponding applications
• Proven FEMA technology: suitable for monitoring and safety functions in gas and burner systems

FEMA DGM Pressure Monitors at ICS Schneider

ICS Schneider offers FEMA DGM pressure monitors for various fuel gas applications and pressure ranges. The range includes numerous variants for low and medium gas pressures as well as versions with additional options such as gold-plated contacts, service function, terminal connection, plastic-coated housing or Ex-i suitability.

When selecting the correct DGM pressure monitor, the fuel gas type, setting range, required switching point, maximum operating pressure, switching differential, electrical switching capacity, connection type, ambient conditions and possible requirements for Ex-i or safety functions should be considered. Since fuel gas applications are safety-related, the design should always be checked based on the specific plant data and applicable regulations.

FAQ – Frequently Asked Questions about FEMA DGM Pressure Monitors

1. What is a FEMA DGM pressure monitor?

A FEMA DGM pressure monitor is a mechanical switching device used to monitor fuel gas pressure. It switches when a set pressure value is reached and can be used for control, shutdown or alarm functions.

2. Which media is the DGM series intended for?

The DGM series is intended for fuel gases. It is used in gas-carrying systems, burner controls, gas pressure regulating lines and similar applications.

3. Which standard is DGM designed according to?

The DGM pressure monitors are designed as pressure monitors for fuel gases according to DIN EN 1854.

4. Which setting ranges are available?

Depending on the type, various setting ranges are available, for example 15–60 mbar, 20–100 mbar, 40–160 mbar, 40–250 mbar, 100–250 mbar, 100–600 mbar or 0.2–1.6 bar.

5. Is the switching differential adjustable?

No. The switching differential of the DGM pressure monitors is not adjustable. It is fixed depending on the respective type and pressure range.

6. What does service function mean for DGM pressure monitors?

Versions with service function allow simplified testing or maintenance during system operation. The exact function depends on the specific device version and system integration.

7. Are DGM pressure monitors available with gold-plated contacts?

Yes. Depending on the version, DGM pressure monitors are available with gold-plated contacts. These are particularly suitable for low switching capacities or signal circuits.

8. Are Ex-i versions available?

Yes. Ex-i versions are available for certain DGM types. These are intended for intrinsically safe circuits and must be integrated according to the respective Ex requirements.

9. Does a FEMA DGM pressure monitor require a supply voltage?

No supply voltage is required for pressure detection itself. An electrical connection is only required for the switching contact or switching signal.

10. Where are DGM pressure monitors typically used?

Typical applications include gas pressure regulating lines, burner systems, heating systems, industrial firing systems, process heat generators and gas-carrying safety chains.

11. Can DGM pressure monitors be used for minimum and maximum pressure monitoring?

Yes. Depending on the system integration, DGM pressure monitors can be used to monitor either minimum pressure or maximum pressure.

12. What information is important for selecting the correct device?

Important information includes the fuel gas type, pressure range, required switching point, maximum operating pressure, switching differential, electrical switching capacity, connection type, ambient conditions, service requirements and possible Ex-i requirements.