G-Series

Refrigerant Gas Detectors

Operating status displayed via LEDs
3 x adjustable alarm levels
3 x alarm relays outputs
Adjustable alarm delay
Configurable alarm behaviour, auto-reset or latching
Failsafe operation
-40°C- +50°C operating range suitable for all refrigeration environments
Test terminal for service tools
Power supply options inc. 12-24V AC/DC & 230V AC

G-Series gas detectors are field-proven over many years, offering simply reliable gas detection for commercial and

industrial refrigerant applications.

There are a number of variants in the G-Series platform to meet application-specific needs, all sharing a common set of features.

These include:

• Operating status displayed via LEDs

• 3 x adjustable alarm levels

• 3 x alarm relay outputs

• Adjustable alarm delay

• Configurable alarm behaviour, auto-reset or latching

• Failsafe operation

• -40°C - + 50°C operating range suitable for all refrigeration environments

• Test terminal for service tools

• Annual maintenance using DT300 service tool

• Power supply options inc. 12-24V AC/DC & 230V AC

G-Series refrigerant gas detectors can be delivered in several versions depending on the application and gas used.

The following options are available:

Model Types

GSH
CO₂ detector using infrared sensor
IP67 enclosure

GSMB
CO₂ detector using infrared sensor
Modbus RTU digital communications
IP67 enclosure

GSLS
CO₂ detector using infrared sensor
High-intensity LED & built-in buzzer (with mute function) for alarm indication
Terminal for connection of a manual remote alarm activation
IP67 enclosure

GD
HFC / HFO / NH3 / R290 / flammable gas / VOC detection using semiconductor sensor
IP21 enclosure

GS
HFC / HFO / NH₃ / R290 / flammable gas / VOC detection using semiconductor sensor
IP54 enclosure

GSR
HFC / HFO / NH₃ / R290 / flammable gas detection using semiconductor sensor
IP54 enclosure
Remote sensor, 5m cable

GK
HFC / HFO / NH₃ / VOC detection using semiconductor sensor
IP54 enclosure
Remote sensor, 1.5m cable
Ventilation ducts installation
(plastic tube with the sensor mounted with a rubber sleeve directly in the channel)

GR
HFC / HFO / NH₃ detector using semiconductor sensor
IP54 enclosure
Remote sensor, 1.5m cable
Vent lines from pressure relief valve installation
Pipe fitting in brass ½ ” Flare

GXR
HFC / HFO / NH₃ / R290 / flammable gas detection using semiconductor sensor
IP56 enclosure
ATEX approved remote sensor, 5m cable
Flameproof sensor enclosure (EX d), can be installed in ATEX Zone1
Controller must be installed outside the ATEX area.

TECHNICAL DATA

GD/GS/GSR/GR/GK:

Housing GS,GSR,GR,GK:	Polycarbonate, (PC) IP54
Housing GD:	Polycarbonate, (PC) IP21
Power supply:	GD/GS/GSR/GR/GK-24: 12-24V AC/DC GD/GS/GSR/GR/GK-230: 230V AC, 50/60 Hz
Power consumption	Max 2W
Indications:	Power/Active and alarm indication on three levels.
Outputs relay:	Potential free contacts (230V, max 5A) .
Ambient temp:	"-40 °C - + 50 °C (Automatic temperature compensation)"
Humidity:	0-95% RH (non-condensing)
Glands:	4 of M16 membrane glands
Screw terminals:	< 1,5 mm2, fuse < 10A
Accuracy:	± 5% of the measurement range
Sensor technology:	Semi-conductive
Response time:	30 s
Sensors lifetime:	5 years
Max. Overrange:	130%
Applicable standards:	EN 378, EN 14624, JRA 4068

GSH/GSLS

Housing:	Polycarbonate, PC, IP67
Power supply:
GSH230 / GSLS230	85…230V AC, 50/60Hz
GSH24 / GSLS24	12..24V AC/DC
Power consumption:	3W
Indications:	Power/Active and alarm indication on three levels
Outputs relay:	Potential free contacts (230V, max 5A)
Ambient temp:	-40 °C..+50 °C
Humidity:	0-95% Rh (non condensing)
Glands:	< 1,5 mm2, fuse < 10A

GSMB:

Housing:	Polycarbonate, PC, IP67
Power supply:
GSMB230	85..230V AC, 50/60Hz
GSMB24	12..24V AC/DC
Power consumption:	3W
Indications:	Power/Active and alarm indication on three levels.
Outputs relay:	Potential free contacts (230V, max 5A)
Ambient temp:	40°C..+50°C
Humidity:	0..95% RH (non-condensing)
Glands:	4 of M16 membrane glands
Screw terminals:	< 2,5 mm2
Data format:	Modbus RTU, 19200 baud, 8, N, 1.
Data output:	RS-485 compatible ModBus RTU port. 3-pole screw terminal (A / B / GND) (8)

GXR

Housing:	Polycarbonate, PC
Power supply:	230 V AC, 50/60 Hz (model Gx230-XX) - 12-24V AC/DC (model Gx24-XX)
Power consumption:	Max 2W
Indications:	Power/Active and alarm indication on three levels.
Outputs relay:	Potential free contacts (230V, max 5A) .
Ambient temp:	-40°C to +40°C (Automatic temperature compensation)
Humidity:	0-95% RH (non-condensing)
Glands:	4 of M16 membrane glands
Screw terminals:	< 1,5 mm2, fuse < 10A

Coming soon...

Order Code	Model	Details	PG
GSH detectors	CO₂
37-4120	GSH24-CO2-10000	0-10000 ppm, 12..24V AC/DC, max 3 W	A
37-4124	GSH24-CO2-30000	0-30000 ppm, 12..24V AC/DC, max 3W	A
37-4170	GSH230-CO2-10000	0-10000 ppm, 85…230V AC, max 3 W	A
37-4174	GSH230-CO2-30000	0-30000 ppm, 85..230V AC, max 3W	A
GSMB detectors	CO₂
37-4120-MB	GSMB24-CO2-10000	0-10000 ppm, 12..24V AC/DC, max 3 W	A
37-4124-MB	GSMB24-CO2-30000	0-30000 ppm, 12..24V AC/DC, max 3W	A
37-4170-MB	GSMB230-CO2-10000	0-10000 ppm, 85..230V, Max 3W	A
37-4174-MB	GSMB230-CO2-30000	0-30000 ppm, 85..230V AC, max 3W	A
GSLS detectors	CO₂
37-4120-LS	GSLS24-CO2-10000	0-10000ppm, 12…24V AC/DC, max 3W	A
37-4124-LS	GSLS24-CO2-30000	0-30000 ppm, 24 V, max 3 W	A
37-4170-LS	GSLS230-CO2-10000	0-10000ppm, 85…230V AC, max 3W	A
37-4174-LS	GSLS230-CO2-30000	0-30000 ppm, 230 V, max 3 W	A
GD detectors	HFC / HFO / NH₃ / R290 / flammable gas
37-220	GD24-HFC-4000	0-4000 ppm, 12..24V AC/DC, max 2 W	A
37-225	GD230-HFC-4000	0-4000 ppm, 230V AC, max 2 W	A
37-252	GD24-NH3-4000	0-4000 ppm, 12..24V AC/DC, max 2 W	A
37-253	GD24-NH3-10000	0-10000 ppm, 12..24V AC/DC, max 2 W	A
37-257	GD230-NH3-4000	0-4000 ppm, 230V AC, max 2 W	A
37-258	GD230-NH3-10000	0-10000 ppm, 230V AC/DC, max 2 W	A
37-230	GD24-HC	0-50% LEL, 12..24V AC/DC, Hydrocarbons	A
37-235	GD230-HC	0-50% LEL, 230V AC, Hydrocarbons	A
37-270	GD24-H2	0-50% LEL, 12..24V AC/DC, (Hydrogen)	A
37-275	GD230-H2	0-50% LEL, 230V AC, (Hydrogen)	A
37-280	GD24- Methane	0-50% LEL, 12..24V AC/DC	A
37-285	GD230- Methane	0-50% LEL, 230V AC	A

Order Code	Model	Details	PG
GD detectors	HFC / HFO / NH₃ / R290 / flammable gas	Continued...
37-290	GD24- Propane	0-50% LEL, 12..24V AC/DC	A
37-295	GD230- Propane	0-50% LEL, 230V AC	A
37-260	GD24-AQS (VOC)	0-200 ppm, 12..24V AC/DC , max 2 W	A
37-265	GD230-AQS (VOC)	0-200 ppm, 230V AC , max 2 W	A
GS detectors	HFC / HFO / NH₃ / R290 / flammable gas	Splash Proof
37-420	GS24-HFC-4000	0-4000 ppm, 12..24V AC/DC, max 2 W	A
37-425	GS230-HFC-4000	0-4000 ppm, 230V AC, max 2 W	A
37-452	GS24-NH3-4000	0-4000 ppm, 12..24V AC/DC, max 2 W	A
37-453	GS24-NH3-10000	0-10000 ppm, 12..24V AC/DC, max 2 W	A
37-457	GS230-NH3-4000	0-4000 ppm, 230V AC, max 2 W	A
37-458	GS230-NH3-10000	0-10000 ppm, 230V AC/DC, max 2 W	A
37-430	GS24-HC	0-50% LEL, 12..24V AC/DC, Hydrocarbons	A
37-435	GS230-HC	0-50% LEL, 230V AC, Hydrocarbons	A
37-470	GS24-H2	0-50% LEL, 12..24V AC/DC, (Hydrogen)	A
37-475	GS230-H2	0-50% LEL, 230V AC, (Hydrogen)	A
37-480	GS24- Methane	0-50% LEL, 12..24V AC/DC	A
37-485	GS230- Methane	0-50% LEL, 230V AC	A
37-490	GS24- Propane	0-50% LEL, 12..24V AC/DC	A
37-495	GS230- Propane	0-50% LEL, 230V AC	A
37-460	GS24-AQS (VOC)	0-200 ppm, 12..24V AC/DC , max 2 W	A
37-465	GS230-AQS (VOC)	0-200 ppm, 230V AC , max 2 W	A
GSR detectors with remote sensor	HFC / HFO / NH₃ / R290 / flammable gas
37-920	GSR24-HFC-4000	0-4000 ppm, 12..24V AC/DC, max 2 W	A
37-925	GSR230-HFC-4000	0-4000 ppm, 230V AC, max 2 W	A
37-952	GSR24-NH3-4000	0-4000 ppm, 12..24V AC/DC, max 2 W	A
37-953	GSR24-NH3-10000	0-10000 ppm, 12..24V AC/DC, max 2 W	A

Order Code	Model	Details	PG
GSR detectors with remote sensor	HFC / HFO / NH₃ / R290 / flammable gas	Continued...
37-957	GSR230-NH3-4000	0-4000 ppm, 230V AC, max 2 W	A
37-958	GSR230-NH3-10000	0-10000 ppm, 230V AC/DC, max 2 W	A
37-930	GSR24-HC	0-50% LEL, 12..24V AC/DC, Hydrocarbons	A
37-935	GSR230-HC	0-50% LEL, 230V AC, Hydrocarbons	A
37-980	GSR24-Methane	0-50% LEL, 12..24V AC/DC	A
37-985	GSR230-Methane	0-50% LEL, 230V AC	A
37-990	GSR24-Propane	0-50% LEL, 12..24V AC/DC	A
37-995	GSR230-Propane	0-50% LEL, 230V AC	A
GK detectors	HFC / HFO / NH₃	For ventilation ducts
37-820	GK24-HFC-4000	0-4000 ppm, 12..24V AC/DC, max 2 W	A
37-825	GK230-HFC-4000	0-4000 ppm, 230V AC, max 2 W	A
37-852	GK24-NH3-4000	0-4000 ppm, 12..24V AC/DC, max 2 W	A
37-857	GK230-NH3-4000	0-4000 ppm, 230V AC, max 2 W	A
37-860	GK24-AQS (VOC)	0-200 ppm, 12..24V AC/DC , max 2 W	A
37-865	GK230-AQS (VOC)	0-200 ppm, 230V AC , max 2 W	A
GR detectors	HFC / HFO / NH₃ /	For vent lines from pressure relief valves
37-620	GR24-HFC-4000	0-4000 ppm, 12..24V AC/DC, max 2 W	A
37-625	GR230-HFC-4000	0-4000 ppm, 230V AC, max 2 W	A
37-652	GR24-NH3-4000	0-4000 ppm, 12..24V AC/DC, max 2 W	A
37-657	GR230-NH3-4000	0-4000 ppm, 230V AC, max 2 W	A
GXR detectors	HFC / HFO / NH₃ /	With ATEX approved remote sensor
37-720	GXR24-HFC-4000	0-4000 ppm, 12..24V AC/DC, max 2 W	A
37-725	GXR230-HFC-4000	0-4000 ppm, 230V AC, max 2 W	A
37-752	GXR24-NH3-4000	0-4000 ppm, 12..24V AC/DC, max 2 W	A
37-757	GXR230-NH3-4000	0-4000 ppm, 230V AC, max 2 W	A
37-753	GXR24-NH3-10000	0-10000 ppm, 12…24V AC/DC, max 2W	A
37-758	GXR230-NH3-10000	0-10000 ppm, 230V AC, max 2W	A
37-730	GXR24-Propane	0-50% LEL, 12..24V AC/DC, max 2 W	A
37-735	GXR230-Propane	0-50% LEL, 230V AC, max 2 W	A

Download related material for this product:

Instruction Sheet GD/GS/GSR/GR/GK-24/230

Instruction Sheet GSH- / GSLS- (CO2)

Instruction Sheet GSMB-CO2

Instruction Sheet GXR24/230

Our G-Series refrigerant gas detectors can be delivered with sensors for the following gas types:

CO2
HFC
HFO
NH3
R290

PRODUCT NAME
Short Description
Part no.: XXXXXXX