The S20 is a wireless photoelectric smoke sensor. It alarms on smoke or over-threshold temperature — an 83 dB sounder on-site, an instant alert to your remote server. Options include CO₂/TVOC early-burning detection, human detection, and a camera that sends a JPEG image with every alarm. Several network versions are available.
83 dB sound pressure
LTE / NB-IoT / LoRaWAN / Sigfox / WiFi
>3–5 years standby by model
Φ130 × 32 mm body, 150–155 g
Whole-home early warning with optional air quality and occupancy sensing — no hubs, no wiring.
Ceiling-mounted detection with centralised alerting for multi-floor commercial buildings.
Battery-powered deployment where cabling is impossible, with JPEG verification on alarm.
Discreet design, remote testing and low-battery warnings across hundreds of rooms.
Instant remote alerts give caregivers immediate awareness, with optional human detection.
Optional TVOC/CO₂ sensing catches overheating materials before open flames develop.
Five radio variants share one enclosure, one app and one data protocol family.
| Model | S20-4 | S20-N | S20-L | S20-S | S20-W |
|---|---|---|---|---|---|
| Bands | LTE-FDD: B1/3/5/7/8/20/28 (EU) B2/3/4/5/7/8/28/66 (LA) | Cat-NB2: B3/5/8/20/28 | EU868 / US915 / AU915 / CN470 / AS923 / KR920 / IN865 | RC1 / RC2 / RC3 / RC4 / RC5 / RC6 / RC7 | WiFi 2.4 GHz |
| Functions | |||||
| Smoke alarm | Yes | Yes | Yes | Yes | Yes |
| Temperature alarm | Yes | Yes | Yes | Yes | Yes |
| Device testing | SMS / App / Button | App / Button | App / Button | App / Button | App / Button |
| Human detection | Optional | Optional | Optional | Optional | Optional |
| JPEG image report | Optional | Optional | Optional | — | Optional |
| Sensors | |||||
| Temperature | Range: −40 to 85 °C | ||||
| Humidity | Range: 0 to 100 % | ||||
| TVOC (optional) | Range: 0 – 65,000 ppb | ||||
| CO₂ (optional) | Range: 400 – 65,000 ppm | ||||
| Air quality (optional) | Level 1 – 5 | ||||
| Hardware | |||||
| Dimension | Φ130 × 32 mm | ||||
| Weight | 155 g | 155 g | 150 g | 150 g | 150 g |
| Battery | 4000 mAh / 3.6 V | ||||
| Working current | 65 mA | 60 mA | 50 mA | 50 mA | 50 mA |
| Sleeping current | 65 µA | 60 µA | 50 µA | 50 µA | 50 µA |
| Battery life (1 ping/day) | >3 years | >4 years | >5 years | >5 years | >3 years |
| Communication | TCP / UDP / MQTT | TCP / UDP / MQTT | LoRaWAN | Sigfox backend | TCP / UDP / MQTT |
| Configuration | APP / SMS | APP | APP | APP | APP |
| Operating temperature | −10 to +60 °C | ||||
| Operating humidity | 5 % – 95 % | ||||
Available with Pre-installed Global IoT SIM & Subscription Model (For Bulk Orders).
If you have in-building WiFi coverage, S20-W is the simplest option. For wide-area deployments without local infrastructure, S20-4 (4G LTE) works nearly anywhere with cellular coverage; S20-N (NB-IoT) and S20-L (LoRaWAN) are ideal for very low-power wide-area networks, and S20-S covers Sigfox regions. Battery life is longest on LoRaWAN and Sigfox (5+ years).
Yes. The camera option (not available on the Sigfox variant) captures a JPEG image when an alarm occurs, including at night, and reports it together with the alarm to your server.
Devices can be tested by button, via the app, or — on the LTE model — by SMS. The unit reports its own battery level and sends a low-power warning, so maintenance is condition-based rather than scheduled.
The S20 detects rising temperature and humidity changes in the early stages of overheating, before visible smoke is present. Optional TVOC and CO₂ sensors add further early-burning sensitivity, but they noticeably increase power consumption.
Send us your deployment size and network environment — we will recommend the right standard variant and options. Private-label, firmware and platform-integration support is available for qualified projects.