The GMS-H gas indicator system consists of one or two MF12-H gas measuring systems and one self-monitoring limit monitor GWZ-2H.

With the aid of a semiconductor sensor, MF12-H measures the percentage of the LEL reached by methane or propane in the indoor air, and then supplies these measured values to limit monitor GWZ-2H via a special interface.

If the limit value is exceeded, the limit monitor signals this through a relay and, in this way, initiates suitable protective measures through subsequent devices; e.g. cutting off the gas supply with the help of a solenoid valve or preventing igniting sparks by switching off the electric system.

MF12-H

• Gas measuring system with a semiconductor sensor in an aluminium housing for wall mounting.
• With a special interface.
• Ambient temperature -10 to +50° C.
• Measuring range: 0-50% LEL.
• The alarm threshold is set directly with a potentiometer.
• Measurable gases: Methane, propane

GWZ-2H

• Self-monitoring limit monitor for max. 2 measuring systems in a plastic housing for wall mounting.
• With two output relays
  (Relay 1: Alarm and malfunction; Relay 2: Horn),
• a key for the operation, including Reset,
• a green LED
  (signals the operativeness of the limit monitor),
• a yellow LED
  (signals a malfunction) and
• a red LED
  (signals an alarm triggered by the measuring system).
• Supply voltage: AC 230 V.