Gas Detectors

MLD Refrigerants

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Manufacturer: GVZ Components

Gas Leakage detector for A1, A2L, A3

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Description

R-290 application

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 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, Relays and 4-20mA.

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, Relays and 4-20mA Output (ALL IN ONE)

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

RANGE and ACCURACY
MLD Gas PN	Gas Type	Measuring Range	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 (UL 60335-2-40)
1	--
2	R290	0-100% LEL	± 6% LEL
3	R32	0-100% LEL		± 3% LEL	± 2.5% LEL
4	R454B	0-100% LEL		± 5% LEL	± 2.5% LEL
5	R454C	0-100% LEL		± 5% LEL	± 2.5% LEL
6	R600 R600a	0-100% LEL	± 5% LEL
7	H2	0-100% LEL	± 5% LEL
8	--

OPERATING FEATURES
Signals Output	Gas concentration, Temperature, Humidity, Pressure, Status, Prealarm, Alarm, Fault, Lifetime
Measurament Output	Modbus, 4-20mA, Relays, 0,4-2V
Visual Information	3 x LED (Status, Prealarm, Alarm/Fault)
Supply Voltage	12-24VDC
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	IP65
Dimensions MLD-S4	13 x 8 x 4,0 cm
Dimensions MLD-MN	13 x 8 x 2,5 cm
Certifications & Approvals	CE, EMC 61326-1:2013, Rohs, IEC60079-29-1, IEC60335-2-40, EN50271, ATEX(opt)