Bacharach MGS-550 Industrial Gas Detector

Bacharach’s MGS-550 leak detector combines electrochemical, semiconductor, catalytic bead and infrared sensors into one platform to support leak detection for the new low GWP (Global Warming Potential) refrigerant blends as well as natural refrigerants to enable gas leak detection in the often harsh environments of industrial refrigeration.

The Bacharach’MGS-550 can easily be integrated into any building management system (BMS). The ModbuRss RTU interface allows the user to program and configure the unit remotely through the BMS. Remote access gives complete control to the user when using Modbus. Alternatively, electrical current or volt analog output provides an industry standard reading using 4-20mA.

Having three integrated relays within each instrument reduces the need for having to wire alarm devices back to a central control system. Because of the integrated relays, the Bacharach MGS-550 can be operated as a stand-alone system. Each relay can be individually programmed to trigger alarm devices and actions separately or as a redundant system.

The straightforward menu structure is identical regardless of the type of sensors used, reducing the costs and amount of time for training required upon installation or during maintenance. Bacharach’s MGS-550 offers the flexibility of adding a second sensor at any point in time without the need for any additional controllers. Any sensor can be remotely mounted from the main instrument to a distance of 5 meters or 15 feet. It meets the requirements of EN 378 and ASHRAE 15.

FEATURES	BENEFITS
One or two sensor capability	Detects two gases and/or in two locations with one instrument
Remote sensor capabilities	Flexible placement in hard to reach areas
Analog and digital interface	Ease of integration with multiple control devices
On-board relays	Connects to local alarm devices for saving costs on installation
Magnetic wand	Non-intrusive configuration and calibration
Status indicator and LED display	Provides at-a-glance status overview and comprehensive direct user interface
Optional MGS-408 Controller	Create an independent, centralised alarm system with up to 6 gas detectors

Specification

Specification	Description
Gases and Range	Refrigerants	1,000 / 10,000 ppm
	CO₂	5,000 / 10,000 / 20,000 / 30,000 / 40,000 / 50,000 ppm
	NH₃*	100 / 1,000 / 5,000** / 10,000 ppm / 100% LEL
	O₂	30Vol%
	CO**	500 / 1,000 ppm
	Combustible Gases	5,000 ppm / 100% LEL
	C₂H₄	2,000 ppm
	NO₂***	20 ppm
Repeatability		±5% of applied gas concentration
Display		Red 5-digit, 7-segmented LED and green status LEDs
Output	Analog	4 to 20 mA, 0 to 5 V, 0 to 10 V, 1 to 5 V, 2 to 10 V
	Digital	Modbus RTU via RS 485
Power		19.5 to 28.5 VDC or 24 VAC ±20%; 3- or 4-wire
Relay		Three relays, SPDT, user assignable
		Rating 2 A @ 30 VDC NO, 0.5 A @ 125 VDC, 0.25 A @ 250 VAC, 30 W, resistive load
Enclosure	General purpose	ABS IP66 with four M20 × 1.5 cable glands
Size (W×H×D) Approx	General purpose	8.3” x 8.9” x 3.4” / 210 × 225 × 85 mm
Weight Approx		GP: 2 lbs / 1 kg; XP: 3.5 lbs / 1.6 kg
Approvals		CE, UL / CSA / IEC EN 61010-1
Ambient Conditions	Temperature	Semiconductor	-40 to 122°F / -40 to +50°C
		Electrochemical	-5 to 122°F / -20 to + 50°C*
		Infrared	-40 to 122°F / -40 to +50°C
		Catalytic Bead	-40 to 122°F / -40 to +50°C
	Humidity	5 to 90 % RH, non condensing
	Pressure	23.6 to 32.5 inch Hg / 800 to 1,100 mbar

NH3 available as low temperature version -40°F / 40°C (not for 5,000 ppm Electrochemical sensor)
** IP66 rated; not available in XP enclosure
*** Not IP66 rated; not available in XP enclosure

Model

Gas	Sensor Range	Type	Base Unit, 1 Local Sensor	Local Sensor
Butane	0-100 %LEL	IR	6600-8016	6600-8816
Butane	0-100 %LEL	CB	6600-8039	6600-8839
CO	0-500 ppm	EC	6600-8080	6600-8880
CO₂	0-5,000 ppm	IR	6600-8010	6600-8810
CO₂	0-10,000 ppm	IR	6600-8011	6600-8811
CO₂	0-20,000 ppm	IR	6600-8012	6600-8812
CO₂	0-30,000 ppm	IR	6600-8013	6600-8813
CO₂	0-40,000 ppm	IR	6600-8014	6600-8814
CO₂	0-50,000 ppm	IR	6600-8015	6600-8815
Ethylene	0-2,000 ppm	SC	6600-8075	6600-8875
HFO1234YF	0-1,000 ppm	SC	6600-8052	6600-8852
HFO1234ZE	0-1,000 ppm	SC	6600-8053	6600-8853
HFO1234ZE	0-10,000 ppm	SC	6600-8067	6600-8867
LPG	0-100 %LEL	CB	6600-8035	6600-8835
Methane	0-100 %LEL	IR	6600-8017	6600-8817
Methane	0-100 %LEL	CB	6600-8036	6600-8836
Methane	0-5,000 ppm	SC	6600-8073	6600-8873
NH₃	0-10,000 ppm	SC	6600-8069	6600-8869
NH₃	0-100 %LEL	CB	6600-8034	6600-8834
NH₃	0-100 ppm	EC	6600-8019	6600-8819
NH₃	0-1,000 ppm	EC	6600-8020	6600-8820
NH₃	0-5,000 ppm	EC	6600-8021	6600-8821
NO₂	0-20 ppm	EC	6600-8024	6600-8824
O₂	0-30 Vol%	EC	6600-8025	6600-8825
Propane	0-100 %LEL	IR	6600-8018	6600-8818
Propane	0-100 %LEL	CB	6600-8038	6600-8838
R-134a	0-1,000 ppm	SC	6600-8042	6600-8842
R-134a	0-10,000 ppm	SC	6600-8056	6600-8856
R-290	0-5,000 ppm	SC	6600-8070	6600-8870
R-32	0-1,000 ppm	SC	6600-8041	6600-8841
R-32	0-10,000 ppm	SC	6600-8055	6600-8855
R-404A	0-1,000 ppm	SC	6600-8043	6600-8843
R-404A	0-10,000 ppm	SC	6600-8057	6600-8857
R-407A	0-1,000 ppm	SC	6600-8044	6600-8844
R-407A	0-10,000 ppm	SC	6600-8058	6600-8858
R-407C	0-1,000 ppm	SC	6600-8045	6600-8845
R-407C	0-10,000 ppm	SC	6600-8059	6600-8859
R-407F	0-1,000 ppm	SC	6600-8046	6600-8846
R-407F	0-10,000 ppm	SC	6600-8060	6600-8860
R-410A	0-1,000 ppm	SC	6600-8047	6600-8847
R-410A	0-10,000 ppm	SC	6600-8061	6600-8861
R-422A	0-1,000 ppm	SC	6600-8048	6600-8848
R-422A	0-10,000 ppm	SC	6600-8062	6600-8862
R-422D	0-1,000 ppm	SC	6600-8049	6600-8849
R-422D	0-10,000 ppm	SC	6600-8063	6600-8863
R-427A	0-1,000 ppm	SC	6600-8050	6600-8850
R-448A	0-1,000 ppm	SC	6600-8076	6600-8876
R-449A	0-1,000 ppm	SC	6600-8077	6600-8877
R-452A	0-1,000 ppm	SC	6600-8078	6600-8878
R-507	0-1,000 ppm	SC	6600-8051	6600-8851
R-507	0-10,000 ppm	SC	6600-8065	6600-8865
R-513A	0-1,000 ppm	SC	6600-8079	6600-8879
R-600	0-5,000 ppm	SC	6600-8071	6600-8871