Bosch FCP-O320 Conventional Optical Smoke Detector, 820 or 470 Ohm (FCP-O320-R470)
A conventional optical smoke detector from the FCP-320 series, offered with an 820 ohm alarm resistor (FCP-O320) or a 470 ohm alarm resistor (FCP-O320-R470).
Dealer for Bosch
Bosch Conventional Fire Detectors in Bhopal: FCP-320, FCH-320 and FCP-500
Fire Protection System (FPS), a Bosch dealer in Bhopal, supplies Bosch conventional smoke, heat and multisensor detectors from the FCP-320/FCH-320 series and the ultra-flat FCP-500 series. FPS installs, tests and maintains them across Madhya Pradesh.
Where to use Conventional Detectors
- Small and medium buildings with a conventional (zone) fire alarm panel
- Shops, offices, clinics and schools
- Extending or replacing detectors on an existing conventional zone
- Dusty areas, using the dust-repellent labyrinth and drift compensation of the FCP-320
- Areas where heat detection is preferred over smoke detection (FCH-T320)
- Areas where a multisensor helps avoid false alarms (OT and OC versions)
- Interiors where a flat, colour matched detector is preferred (FCP-500)
- Hidden detector locations that need a remote alarm indicator
Bosch Conventional Detectors models
Bosch FCP-OT320 Conventional Optical/Thermal Multisensor Detector, 820 or 470 Ohm (FCP-OT320-R470)
A conventional multisensor detector that combines an optical smoke sensor with a heat sensor, offered with an 820 ohm or a 470 ohm alarm resistor.
Bosch FCP-OC320 Conventional Optical/Chemical Multisensor Detector, 820 or 470 Ohm (FCP-OC320-R470)
A conventional multisensor detector that combines an optical smoke sensor with a chemical (gas) sensor, offered with an 820 ohm or a 470 ohm alarm resistor.
Bosch FCH-T320 Conventional Heat Detector, Rate-of-Rise and Maximum, 820 Ohm
A conventional heat detector that responds to a rapid rise in temperature and to a maximum temperature, with an 820 ohm alarm resistor.
Bosch FCH-T320-R470 Conventional Heat Detector, Rate-of-Rise and Maximum, 470 Ohm
The 470 ohm alarm resistor version of the FCH-T320 conventional heat detector, for panels that expect a 470 ohm alarm load.
Bosch FCP-O 500 Conventional Optical Smoke Detector, Ultra-Flat, FCP-500 Series
A conventional optical smoke detector with an ultra-flat design for flush ceiling mounting, colour matched to the room with toning inserts.
Bosch FCP-OC 500 Conventional Optical/Chemical Multisensor Detector, Ultra-Flat, FCP-500 Series
A conventional multisensor detector with an optical sensor and an additional gas sensor, in the ultra-flat FCP-500 design for flush ceiling mounting.
How to choose
A conventional detector is wired on a zone circuit rather than an addressable loop, so the panel shows which zone is in alarm, not which detector. When a conventional detector alarms it switches an alarm resistor across the zone, and the panel reads the change. Bosch makes the FCP-320 and FCH-320 detectors in two versions, with an 820 ohm resistor or with a 470 ohm resistor (code ending -R470), and states that this, together with the 8.5 to 30 V DC operating range, lets them work with nearly all conventional fire panels. Pick the resistor value your panel expects.
Then choose the sensor. FCP-O320 is optical (smoke), FCP-OT320 combines optical and heat, FCP-OC320 combines optical and chemical (gas) sensing, and FCH-T320 is a heat detector that reacts both to a fast temperature rise and to a maximum temperature. The FCP-320 detectors have drift compensation that adjusts the threshold as the optical sensor gets dirty, a dust-repellent labyrinth, a removal lock that can be switched on or off, and an output for a remote alarm indicator. Bosch lists the MS 400 and MS 400 B as bases for them.
The FCP-500 detectors (FCP-O 500 optical and FCP-OC 500 optical/chemical) have an ultra-flat design for flush ceiling mounting, with colour toning inserts to match the ceiling, and run on 8.5 to 33 volts DC. Check the approvals listed under each model, because they differ between versions.
FPS supplies, installs, tests and maintains Bosch conventional detectors in Bhopal and across Madhya Pradesh. Confirm the exact part number with FPS before ordering.
Frequently asked questions
Should I choose the 820 ohm or the 470 ohm Bosch detector?
Choose the alarm resistor value that your conventional fire panel is designed for. The standard FCP-320 and FCH-320 detectors use 820 ohm, and the versions ending in -R470 use 470 ohm.
What is drift compensation?
As dust builds up in an optical detector, its reading slowly rises. The FCP-320 smoke and multisensor detectors actively adjust their alarm threshold to make up for this soiling.
What does the Bosch FCH-T320 heat detector respond to?
Bosch describes it as a thermal differential and thermal maximum detector, so it reacts to a rapid rise in temperature and to a fixed maximum temperature.
Can the detector heads be locked in their bases?
Yes. The FCP-320 and FCH-320 detectors have a mechanical removal lock that can be activated or deactivated.
What is special about the FCP-500 detectors?
They have an ultra-flat design for flush ceiling mounting and can be colour matched to the surroundings with toning inserts. They come as an optical smoke detector and as an optical/chemical multisensor.
Does FPS supply Bosch conventional detectors in Bhopal?
Yes. FPS is a Bosch dealer and supplies, installs, tests and maintains Bosch conventional detectors in Bhopal and across Madhya Pradesh. Prices are on request: call or WhatsApp +91 92440 89060.