MLD Refrigerants

Name: MLD Refrigerants
Brand: GVZ Components

Gas Detectors

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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).

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

OPERATING FEATURES
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	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	128 x 89 x 37 mm
Dimensions MLD-MN	128 x 89 x 22 mm
Certifications & Approvals	CE, EMC, Rohs, IECEx, IEC60335-2-40, ATEX EN60079-0, EN60079-11: Intrinsecally Safe device - Gr.II Cat.3G Ex ic IIA/IIC TX Gc On running tests for SIL1/SIL2 according to EN50402 / IEC50271