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G 521 - RFG 361 

C1  Eng.  

25.11.08 MZ   

Rev. 02

 

 

We reserve the right to make changes without notice

COSTER

GAS DETECTOR WITH  

REMOTE SENSOR

• Remote sensor for detecting methane, propane-LPG, carbon monoxide (CO)

• Sensors with sensing element specific for each type of gas

• 1 SPDT voltage-free output relay

• Adjustable alarm threshold (for methane and propane-LPG)

• Self-diagnosis sensor fault

• Construction and operation according to 

CEI EN 50194 and CEI EN 50244  for Methane and Propane LPG 

CEI EN 50291 and CEI EN 50292 for CO - carbone monoxide

• Installation on DIN rail; Protection IP 40

• Power supply 230 V ~

1. APPLICATION

RFG 361 is designed for the detection of gas in spaces such as: boiler rooms, laboratories, workshops, garages. 

parking silos.
According to the type of sensor connected, monitors the concentration in air of the following gases: methane, 
propane-LPG, carbon monoxide.
The sensors used are selective, and so are not influenced by gases other than that for which they are dedicated. 
They have the following characteristics:

        – methane and propane-LPG: sensors with semiconductors rendered selective by means of special filters,

        – carbon monoxide (CO): the sensor is an electrochemical cell with two electrodes specific for CO.

The detector provides as outputs a pre-alarm signal and an alarm signal

• exceeding the pre-alarm threshold is indicated visibly by a flashing light.,

• exceeding the alarm threshold is indicated by visible and acoustic warnings and, by means of an output relay, 

permits making an operational intervention such as, for example:

        – closing a N.C. shut-off valve,

        – closing a N.O. shut-off valve,

        – switching on an aeration fan,

        –sending an alarm signal to a remote site.

RFG 361

   C1  Eng.

Code

Description

Gas

Sensing element

"SELECTIVE"

Protection

Data

sheet

SRD 150

SRD 250

SRD 350

SRS 150

SRS 250

SRS 350

Sensor in domestic enclosure
Sensor in domestic enclosure
Sensor in domestic enclosure
Sensor in industrial enclosure
Sensor in industrial enclosure
Sensor in industrial enclosure

methane

propane-LPG

carbon monoxide

methane

propane-LPG

carbon monoxide

Figaro  TGS 2611-E00

Figaro  TGS 2610-D00

Sixth-Sense  ECO-Sure/2e

Figaro  TGS 2611-E00

Figaro  TGS 2610-D00

Sixth-Sense  ECO-Sure/2e

IP 30
IP 30
IP 30
IP 44
IP 44
IP 44






2. GAS DETECTING SENSORS

G 521

25.11.08 MZ

Rev. 02

Summary of Contents for RFG 361

Page 1: ...propane LPG sensors with semiconductors rendered selective by means of special filters carbon monoxide CO the sensor is an electrochemical cell with two electrodes specific for CO The detector provides as outputs a pre alarm signal and an alarm signal exceeding the pre alarm threshold is indicated visibly by a flashing light exceeding the alarm threshold is indicated by visible and acoustic warnin...

Page 2: ... 0 8 3 000 5 000 8 000 ppM Propane LPG Alarm Propane LPG 0 22 0 35 0 56 2 200 3 500 5 600 ppm Pre alarm propane LPG 0 14 0 22 0 35 1 400 2 200 3 500 ppM Carbon monoxide CO Warning in detecting carbon monoxide CO the levels and interventiontimesareprocessedandcontrolledby a microprocessor The Sensitivity control must obviously be set in the 0 position Carbon monoxide threshold time 50 ppm no alarm ...

Page 3: ...ctive in places subject to possible sprays of water particularly sensors positioned near the floor in places where the temperature or humidity could be outside the limits stated in TECHNICAL DATA 6 3 Solenoid shut off valve This must be installed on the gas distribution pipe taking the following precautions if possible in a different space from the one being controlled in an easily accessible plac...

Page 4: ...l jumpers switch off power N B the relay switch is shown in the condition of thedevice not being powered B Gas monitoring sensor 8 1 General diagram 8 2 2 Diagram of wiring with N C valve 230 V 8 2 Examples of wiring 8 2 1 Diagram of wiring with N O valve with manual reset 230 V B Gas monitoring sensor Y1 N O solenoid valve with manual reset B Gas monitoring sensor Y2 N C solenoid valve The normal...

Page 5: ...ion threshold sensitivity can be increased or decreased according to particular conditions of the space in which the sensor is positioned or for specific requirements knob towards increase of sensitivity knob towards decrease of sensitivity These adjustments however remain within the limits required by the regulations so it is always possible to intervene under conditions of the maximum safety The...

Page 6: ...is exceeded this is indicated by the intermittent lighting of the ALARM LED 4 4 on the detector 9 5 Alarm When the signal exceeds the alarm threshold for more than 20 seconds so as to have the certainty that it is not a momentary situation or a false alarm the detector activates the internal alarm only if without jumper M F1 on the facia the ALARM LED lights and stays lit 4 4 Moreover the alarm st...

Page 7: ...s until RESET button 4 5 is pres sed for at least 5 seconds If detector controls a valve with manual reset it is necessary to re open manually also the valve 11 WARNING IN EVENT OF ALARM Combustible gases methane and propane LPG First of all it must be remembered that in regard to the combustible gases methane and propane LPG most people are able to be aware of their presence even at concentration...

Page 8: ...i Via Gen Treboldi 190 192 Tel 39 0364773202 25048 Edolo BS Tel 39 0364773217 R E A C C I A A di Milano 969861 C F e Num di Iscr al Registro Imprese di Milano 00856030150 P IVA IT 00542780986 Cap Sociale 4 864 000 00 int vers ISO 9001 2000 THE INTERNATIONAL CERTIFICATION NETWORK Registration Number IT 34674 CSQ Certificate N 9115 COEE INFORMAZIONI TECNICHE Numero Verde 800 COSTER 800 267837 Date R...

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