💡 Key Summary: Receives Distributed Leak Alarm Signals Wirelessly and Provides Local Alarm & Monitoring at One Point
YH-RF400L RX is a self-alarming wireless leak receiver that wirelessly receives leak alarm signals transmitted from on-site transmitters and immediately notifies personnel through a signal tower light and buzzer. It enables monitoring of multiple leak zones from a single location without complex cabling, improving leak safety management across wide facilities and large equipment areas. The unit also provides relay contact output (COM, NO) for connection to external alarm devices or higher-level control/monitoring systems.
● Wireless Leak Alarm Reception: Receives leak alarm signals from remote transmitters in real time and triggers an immediate alarm.
● Minimal Cabling: Wireless configuration reduces installation cost and construction burden in hard-to-wire areas.
● Multi-Zone Leak Monitoring: Ideal for building a monitoring point that checks and manages leak alarms from multiple zones in one place.
● Immediate On-Site Notification: A signal tower light and buzzer provide clear, intuitive indication of leak alarm events.
● Unified Design: Matches the design tone of Yoohantech standard leak alarm receivers (YH-100L series) for system consistency.
| Item | Specification |
| Model | YH-RF400L RX (Wireless Leak Alarm Receiver with Signal Tower) |
| Power Supply | AC 220V 60Hz |
| Power Consumption | Max 20W |
| Power Indicator | Yellow lamp ON (Power ON) |
| Operation Indicator | Green lamp ON (Normal operation) |
| Alarm Indicator | Red lamp ON (Alarm activation) |
| Operating Temp./Humidity | -10–40°C, 0–80% RH |
| Buzzer | 70dB or higher (at 1m distance) |
| Alarm Output | Relay contact COM/NO |
| Frequency | • 447.8625–447.9875 MHz band (Data transmission / 11 channels) • 447.2625–447.5625 MHz band (Safety system / 25 channels) |
| Receiving Sensitivity | -117 dBm (Tx power: +10 dBm) |
| Transmission Range | Over 1000m (Line-of-sight, 100% reception success, 4,800bps) |
| Antenna | SMA type external antenna |
| Channels | 1–10 CH (Expandable) |
| Backup Power | • Ni-Cd Battery 24V/1300mA (≤ 6 channels): up to ~90 min • Ni-Cd Battery 24V/1300mA (≤ 10 channels): up to ~70 min • Ni-Cd Battery 24V/2600mA (≤ 20 channels): up to ~66 min |
♣ Dimensions may vary depending on explosion-proof and warning light options. (Antenna excluded)
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| Circuits | Dimensions |
| 1 | H: 207 x W: 370 mm |
| 2–4 | H: 293 x W: 400 mm |
| 5–6 | H: 379 x W: 400 mm |
| 7–10 | H: 551 x W: 400 mm |
| 11+ | Custom-built upon request |
♣ Dimensions may vary depending on explosion-proof and warning light options. (Antenna excluded)
[ 105dB High-Output Warning Light ]
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