MLD Flammable

Gas Detectors

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Manufacturer: GVZ Components

Gas Leakage detector for flammable gases


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flammable gas detector

Molecular Leakage Detector for flammable gas based on ultimate MPS technology.

This flammable gas detector is a unique solution using the latest MPS (Molecular Property Spectrometry) technology to indicate the presence of flammable gases providing both a continous signal proportional to the gas concentration and the activation via relay for alarming once a prefixed (and settable) level is reached.
It combines all the advantages of MPS technology as in terms of long lifetime, no field calibration, built-in envirnomental compensation, no poisoning, wide temperature operating range and durability with a dedicated electronic board for easy interfacing the common control units thanks to the multiple outputs: Modbus, 2x Relays and 2x Analogue Output (ALL IN ONE).

  • No field calibration
  • No cross sensitivity
  • Long lifetime 15+ years
  • Fail safe (built-in diagnostic)
  • Flammable gases concentration 0-100% LEL
  • Built-in T and Rh compensation
  • Immune to poisoning
  • Operating range -40° to 75° C, 0-100% Rh
  • Modbus, 2x Relays and 2x Analogue Output (ALL IN ONE)
Technology Molecular Property Spectrometry by NevadaNano
Gas detected butane, ethane, hydrogen, isobutane, isobutylene, isopropanol, methane,
methyl ethyl ketone, octane, pentane, propane, propylene, toluene, xylene
Measurament range 0-100% LEL
Accuracy ±6% LEL (propane)±5% LEL (others)
Response Time (T90) <20 sec.
Resolution 0,1% LEL
Lifetime 15+ years

Signals Output

Gas concentration, Temperature, Humidity, Pressure, Status, Prealarm, Alarm, Fault, Lifetime

Measurament Output

Digital:  Modbus (RS-485)
Analog: 4-20mA
Analog: 0,4-2V
Dry Contacts: 2x Relays (Alarm1 / Alarm2 / Fault)

Visual Information

Visual: 3x LEDs (Status / Alarm1 / Alarm2 / Fault)

Supply Voltage


Power Consumption

35mA average - 50mA peak

Operating Temperature

-40° to +75°C

Operating Humidity

0 - 100% RH

Operating Pressure

80 to 120 kPa

Protection grade


Dimensions MLD-S4

128 x 89 x 37 mm

Dimensions MLD-MN

128 x 89 x 22 mm

Certifications & Approvals

CE, EMC, Rohs,  EN60079-0, EN60079-11, ATEX
SIL2 conformity according to EN50402 / IEC 50271 / IEC 50270 / IEC61508 ongoing


Via Magenta, 77/16A
20017 Rho (MI) - Italy
Phone +39 02 3340 0846
VAT: IT04126380155
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Via Magenta, 77/16A
Rho 20017, Italy
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+39 02 3340 0846

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