MLD Refrigerants

Gas Detectors

 
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  • NEW !
Manufacturer: GVZ Components

Gas Leakage detector for A1, A2L, A3

    • No field calibration
    • No cross sensitivity
    • Long lifetime 15+ years
    • Fail safe (built-in diagnostic)
    • A1 gas concentration 400-2500ppm
    • A2L, A3 gas concentration 5-100% 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)
    • HVAC Systems
    • Refrigeration
    • Cool Store
    • Hotels ventilation system
    • Home & Building automation
    • Mobile HVAC units
    • Railway conditioning
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Description


MLD gas detector in a server room

Molecular Leakage Detector for A1, A2L, A3 refrigerant gas based on ultimate MPS technology. Hydrogen Detection READY.

This refrigerant gas detector is a unique solution using the latest MPS (Molecular Property Spectrometry) technology to indicate the presence of low GWP A1, A2L and A3 refrigerant gas providing both a continuos 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 environmental 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).

mld gas detector sample application
SENSOR PERFORMANCES
Technology Molecular Property Spectrometry by NevadaNano
Gas detected A1
R404A, R407C
A2L
R32, R454B, R454C
A3
R290, R170, R600, R600a, R1270
Response Time (T90) <20 sec. <15 sec. <20 sec.
Resolution 1ppm 0,1% LEL 0,1% LEL
Lifetime 15+ years

 
GAS DETECTED
MLD Gas ref. Gas Type Measuring Range Resolution Accuracy (0-50 %LEL)
guaranteed across full environmental range
(ISO 10156)
Accuracy @25%LEL
guaranteed across full environmental range
(ISO817/ASHRAE 34)
Accuracy ≤25 %LEL
@ 20 °C 
- 50 %RH
(UL60335-2-40)
01 --          
02 Propane (R290) 0-100% LEL 0.1% LEL ± 6% LEL    
03 HFC (R32) 0-100% LEL 0.1% LEL   ± 3% LEL ± 2.5% LEL
04 HFO (R454B) 0-100% LEL 0.1% LEL   ± 5% LEL ± 2.5% LEL
05 HFO (R454C) 0-100% LEL 0.1% LEL   ± 5% LEL ± 2.5% LEL
06 Butane/Isobutane/Ethane/Propylene 
(R600/R600a/R170/R1270)
0-100% LEL 0.1% LEL ± 5% LEL    
07 Hydrogen 0-100% LEL 0.1% LEL ±5% LEL    
08 Methane 0-100% LEL 0.1% LEL ±3% LEL    
X8 Methane 
[extended range]
50-1M ppm 1 ppm ±10% reading    
09 --          
10 HFC (R404A)   1 ppm   200 ppm  
11 HFC (R407C)   1 ppm   200 ppm  
 

TECHNICAL SPECIFICATIONS DESCRIPTION

Power Supply

12 VDC with ±10% tolerance
24 VDC with ±10% tolerance
1,2W max

Consumption

<50 mA

Measurement Range

See previous table

Accuracy

See previous table

IP rating

IP65

Operating Temperature Range

-40° to +75°C

Operating Humidity Range

0 - 100% RH

Dimensions

89 x 128 x22 mm | 3.5” x 5.04” x 0.87” (MLD-MN)
89 x 128 x37 mm | 3.5” x 5.04” x 1.46” (MLD-S4)

Weight

210g (1,5m cable)   -   320g (3m cable)

Serial Communication

Modbus RS485

Relays

1) Low Concentration Alarm
2) High Concentration Alarm + Fault status

Output Relay Max Switching Voltage 

12 VDC | 24VDC

Output Relay Max Switching Current

2 A | 896 mA (IEC 60079-11) (max 261 mA for Hydrogen)

Analogue Current Output

4-20 mA

Analogue Volt Output

0.1-2.9 V

Visual output (3x LEDs)

LED 1 GREEN => Status indication
LED 2 RED => Alarm Low Conc.
LED 3 RED => Fault or Alarm High Conc. 

CERTIFICATIONS

CE, EMC, Rohs, IEC60335-2-40, EN60079-0, EN60079-11, ATEX
SIL2 conformity according to EN50402 / IEC 50271 / IEC 50270 / IEC61508 ongoing

Documentation


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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