Addressable wireless fire alarm – Series 200A
DAS-WHD-200AAddressable wireless fixed-temperature heat detector
Heat detector of the Tan Vien Series 200A addressable wireless fire alarm system.
- Class B heat detector, operating up to +65 °C
- Suitable for kitchens, garages, machine rooms, storerooms
- Li-MnO₂ 3 V battery, ≈ 3 years (Level I), low-battery self-report
- LoRa transmission 312–316 MHz, 1000 m unobstructed
Heat detector with an integrated LoRa module that continuously measures ambient temperature; when the threshold is exceeded it activates the local light and sounder and sends a fire signal to the panel. For places where fires generate a lot of heat, or where smoke detectors are prone to false alarms.
Key features
- Epoxy-coated heat sensor. Good electrical insulation and stability; unaffected by dust, steam or kitchen smoke.
- Suited to heat-generating areas. Kitchens, garages, machine rooms, storerooms — where smoke detectors are prone to false alarms.
- Sounder + 3-colour LED. Local warning, clearly indicating monitoring / fire / fault / low battery.
- One-button registration / deletion. Fast installation, no software needed.
Indicator status
| Power-on | Green flashes once |
|---|---|
| Monitoring | Green flashes once every ≈ 6 min |
| Fire alarm | Red steady + sounder ≈ 4 s per cycle |
| Sensor / button fault | Yellow flashes once every ≈ 2 s + short beep |
| Low battery (< 2.75 V) | Yellow flashes once every ≈ 30 s + short beep |
Installation notes
- Use where fires generate a lot of heat; do not use where fires mainly produce smoke.
- Do not install where the ambient temperature > +65 °C or humidity is excessive.
- Layout per Table 2 of TCVN 5738:2021 (ceiling ≤ 3.5 m: ≤ 25 m², spacing ≤ 5 m).
For detailed network registration, installation and commissioning procedures, see Series 200A Design, Installation and Operation Manual (PDF).
Suitable installation locations
DAS-WHD-200A technical specifications
| Model | DAS-WHD-200A |
|---|---|
| Rated voltage | DC 3 V (1 Li-MnO₂ CR17505 battery) |
| Average monitoring current | < 100 µA |
| Average fire alarm current | < 20 mA (with sounder) |
| Frequency / transmit power | 312 – 316 MHz / ≤ 20 dBm |
| Receiver sensitivity | −126 dBm |
| Transmission range | 1000 m (unobstructed – manufacturer's figure) |
| Battery life | ≈ 3 years (Level I) · up to ≈ 5 years (Level II) |
| Dimensions | Ø 115 × 48 mm |
| Weight | ≈ 134 g |
| Housing / color | ABS / white |
| Environment | Indoor; −10 °C to +65 °C; RH ≤ 95 % |
| Reference standards | TCVN 7568-5 (ISO 7240-5) · TCVN 7568-25:2023 |
The 1000 m range is a manufacturer's figure measured in an unobstructed space. For indoor design in reinforced-concrete buildings, use a radius of ≈ 25 m around the panel/repeater (≈ 15 m in factories with heavy interference), and a radio survey is mandatory: pass when RSSI ≥ −100 dBm, SNR > 0.
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