Legal basis (in Polish law)

§ 97.1. Pomieszczenia przeznaczone do składowania lub stosowania materiałów niebezpiecznych pod względem pożarowym lub wybuchowym oraz pomieszczenia, w których istnieje niebezpieczeństwo wydzielania się substancji sklasyfikowanych jako niebezpieczne, powinny być wyposażone w:
1) urządzenia zapewniające sygnalizację o zagrożeniach;

Detected substance/property

Substance/property:
oxygen ↑ (O2)
Hazard:
oxygenation / risk of ignition
Density relative to air:
1.11

Location of detectors

  1. Near oxygen therapy stations, in the patient area.
  2. Away from supply air vents, windows, and doors.
  3. In a location not exposed to direct influence of outside air, water vapor, or liquids.

Standard configurations of gas detection systems

Example 1
System topology
Star
Supply voltage of the control unit
12VDC
Control unit
MD-2.A
Maximum number of gas detectors
2
Emergency power backup

Type of device: DG/F — Threshold detectors of toxic and combustible gases (also oxygen and refrigerants) with splash-proof construction
Type of device: MD-1, MD-2, MD-4 — Control and power supply units for 1 or up to 2/4 of DEX/F, DEX/A, DG/F or DG.EN threshold gas detectors
Type of device: SL-32 — Visual and acoustic warning devices for visual and acoustic signalling of alarm conditions
Type of device: GSM — Devices designed for remote monitoring of gas detection system status
Type of device: SW-20 — Double switches for 230 AC power supply
Example 2
System topology
Serial (linear)
Supply voltage
230VAC
Maximum number of gas detectors
Emergency power backup

Type of device: WG.EGx — Threshold, autonomous detectors for carbon dioxide (CO2), carbon monoxide (CO), oxygen (O2), combustible (LPG/CNG) gases or refrigerants
Type of device: SL-32 — Visual and acoustic warning devices for visual and acoustic signalling of alarm conditions
Type of device: TP-4 — Internal LED warning boards to visually present the alarm status appearing at the control outputs

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