Automatic fire detection and alarm unit JTW-ZD-620L-VN

Product
Wireless standalone heat detector (A) — JTW-ZD-620L-VN. The detector integrates a built-in wireless communication module to monitor ambient temperature and trigger audible and visual alarms when a preset threshold is exceeded. It provides connection output for audible/visual alarm devices.

Product features

• Thin body with guide trough and 360° blind screw installation design.
• Circuit board processed with full wax immersion for improved protection.
• Enhanced insulation for higher reliability.
• Low power consumption with built-in battery voltage detection circuit.
• Specialized chips developed in cooperation with international manufacturers.

Product Info
The JTW-ZD-620L-VN standalone heat detector (A) measures real-time temperature in the surrounding area and detects temperature rises associated with fire events. When the measured temperature exceeds the configured threshold, the unit issues audible and visual alarm signals and communicates the alarm status wirelessly to the monitoring system or connected alarm devices.

Technical Parameters

• Model: JTW-ZD-620L-VN
• Physical dimensions: 115 mm × 48 mm
• Rated operating voltage: DC 3 V
• Operating frequency: 444.4–444.8 MHz
• Average monitoring current: <100 μA
• Alarm current: <20 mA
• Max. communication distance: 200 m
• Receiving sensitivity: -126 dBm
• Transmission power: ≤17 dBm
• Case material / color: ABS, white
• Weight: ≈134 g
• Operating environment: Indoor; temperature -10°C to +55°C; relative humidity ≤95% (40°C ±2°C non‑condensing)