JA-185ST Wireless combined smoke and heat detector

The JA-185ST is used to detect fire hazards in the interior of residential or commercial buildings. The detector can be installed also in mobile homes or caravans. It is not designed to be installed in industrial premises.

Wireless combined smoke and heat detector

JA-185ST Wireless combined smoke and heat detector

The JA-185ST detector uses wireless communication and it is powered with three AA batteries.

The detector indicates a fire hazard using the built-in LED indicator and acoustic signalling.

The JA-185ST consists of two independent detectors – an optical smoke detector and a heat detector. The optical smoke detector works on the principle of scattered light. It is very sensitive to large dust particles which are present in dense smoke. It is less sensitive to smaller particles generated by the combustion of liquids such as alcohol. That is why the fire detector also contains a built-in heat detector which has a slower reaction but is much better at detecting fire which generates only a small amount of smoke.


Power 3 x AA alkaline batteries 1.5 V, 2.4 Ah
Please note: Batteries are not included
Typical lifetime approximetly 3 years
Communication band 868.1 MHz, Oasis protocol
Communication range approximetly 300 meters (unrestricted area)
Dimensions diameter 126 mm, height 50 mm
Smoke detection optical light scattering and acoustic signalling
Sensitivity of smoke detector m = 0.11 - 0.13 dB/m Pursuant to EN 14604:2005, EN 54-7
Temperature detection class A1 according to EN 54-5
Alarm Temperature +60 ° C to +65 ° C
Operating temperature range -10 ° C to +65 ° C
Meets EN 54-25, EN 54-7, EN 54-25
Complies with ETSI EN 300 220, EN 50130-4, EN 55022, EN 60950-1
Can be operated to ERC REC 70-03