Comparison Ajax FireProtect 2 RB (Heat/Smoke/CO) vs Ajax FireProtect 2 SB (Heat/Smoke/CO)

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	Ajax FireProtect 2 RB (Heat/Smoke/CO)	Ajax FireProtect 2 SB (Heat/Smoke/CO)
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	Protection against false alarms due to water vapor. Trigger at CO concentration: 50ppm in 90 minutes, 100ppm in 40 minutes, 300ppm in 3 minutes. Triggers at 64°C or a temperature increase of 10°C per minute. Synchronous operation of several sensors. There are versions with different sets of sensors. The difference from FireProtect 2 SB (Heat/Smoke/CO) is a replaceable battery, but its operating life is shorter. There is a version with mains power and battery backup FireProtect 2 AC (Heat/Smoke/CO).	Protection against false alarms due to water vapor. Trigger at CO concentration: 50ppm in 90 minutes, 100ppm in 40 minutes, 300ppm in 3 minutes. Triggers at 64°C or a temperature increase of 10°C per minute. Synchronous operation of several sensors. There are versions with different sets of sensors. The difference from FireProtect 2 RB (Heat/Smoke/CO) is a non-replaceable battery and a longer battery life. There is a version with mains power and battery backup FireProtect 2 AC (Heat/Smoke/CO).
Sensor	smoke carbon monoxide (CO) temperature	smoke carbon monoxide (CO) temperature
Mount	indoor	indoor
Installation	ceiling-mounted	ceiling-mounted
Connection	wireless	wireless
Communication protocol	Jeweller	Jeweller
Features	alert tamper-evident / tear-off protection jamming alert	alert tamper-evident / tear-off protection jamming alert
General
Threshold	64 °C	64 °C
Communication range	1700 m	1700 m
Power source	batteries	batteries
Working hours	84 months	120 months
Protection class	IP20	IP20
Operating temperature	0 °C ~ +50 °C	0 °C ~ +50 °C
Maximum humidity	80 %	80 %
Dimensions	124x124x45 mm	124x124x45 mm
Weight	270 g	270 g
Added to E-Catalog	june 2023	june 2023

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Glossary

Working hours

Operating time of the self-powered sensor on one set of batteries or battery charge (see "Power"). Note that this indicator is quite approximate — it is usually indicated either for an perfect or for a certain “average” mode of operation. The real battery life also depends on a number of practical nuances: the frequency of operations, the communication range, the level of interference, etc., up to the air temperature. So in fact, the operating time may differ from the claimed one, and in the other direction. Nevertheless, according to this characteristic, it is quite possible to both evaluate the overall battery life of the sensor and compare different models with each other: the difference in the indicated operating time usually fully corresponds to the difference in real battery life.

Note that modern sensors have very low power consumption, so their operating time is calculated in months.