Flammable Gas Detector
Earlier Alarm, Faster Fire-fighting, Less Loss.
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Earlier Alarm, Faster Fire-fighting, Less Loss.
The combustible gas detector OT202B is designed for commercial use. It is intended to detect leakage of natural gas (methane gas), town gas, and bottled gas (propane gas). The tri-color indicator gives the user an immediate understanding of the current state of the detector, red for alarm, yellow for fault and green for normal monitoring. The gas detector can be mounted high (for methane gas) or low place (for propane (LPG) gas). It is equipped with a sturdy mounting base for quick, easy, and secure installation. It is connected to Orena ODH series conventional fire alarm control panel or zone interface module of Orena and other brands.
Features:
● Detect all sorts of combustible gases, natural gas (methane), bottled gas (propane), LPG (Liquefied petroleum Gas), LNG (Liquefied natural gas), coal gas, including town gas.
● High quality metal-oxide semiconductor gas sensor
● Self-diagnostic function by MCU intelligent firmware
● Built-in buzzer to alert field personnel of the current state of gas leakage
● 3-color status indicator (alarm, fault, normal)
● 1 alarm output signal to activate the remote indicator or other devices
● SMT technology, firmly, high secure and anti-jamming
● Excellent reliability & High stability
● Easy plug-in of the head to base
● SEMS screws for easy wiring
Specifications:
● Operating Voltage: DC9V to DC28V
● Standby Current: ≤45mA (24V)
● Alarm current: ≤ 60mA (24V)
● Measurement Range: (0 to100) %LEL
● Measurement Accuracy: ±3%LEL
● Sensitivity: 5000ppm (10%LEL)
● Warm-up Time: 2~4 minutes
● Alarm Sound Level: ≥80dB/1m
● Wiring: 4-wire
● Operating Environment: Temperature: 0°C~55°C Related Humidity: ≤95% non-condensing
● Dimensions: Diameter 99mm Height 48mm (with base)
● Weight: 136g (with base)
Wiring:
Terminals T2,T5: connect to 24Vdc power supply of conventional fire alarm panel or zone interface module of addressable fire alarm control panel
Terminal T3,T6: alarm relay output (dry contacts), it is opened in normal condition and it is closed in alarm condition.
Instructions:
Check and test the gas alarm after installation. It should be tested monthly and check after re-occupation following a holiday.
● Power on: After turn on the power, the LED is on, and then the unit would take 2~3 minutes to warm up. In the warm up time, the Yellow LED would flash until end of the warm up period.
● Check that LED indication LED is on to ensure the power supply is turn on.
● Check that the LED flashes every 5 seconds to ensure the unit is in operating mode.
● Test: In the normal status, Press and hold the test button and the unit should sound and the LED light and relay output.
● Silence: In the alarm status, press Test button, the unit enter the silence status, the sound silenced and the red LED flashes quickly, about 10 minutes late, the unit exit the silence status.
● Reset: In the alarm status, press the Test button down and hold above 5 seconds, the unit would restore to normal status.
● Alarm: While detecting the gas leaking, the Red Alarm LED would turn on and the buzzer sound, and relay contacts would be activated and output signals.
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