💡 Key Summary: Card-Type Wireless Leak Alarm Transmitter Expandable up to 44 Channels via Slot (Card) Modules
YH-RF500L TX is a multi-channel wireless leak alarm transmitter built on a slot (card) modular architecture, allowing flexible expansion to match required channel capacity. It sends alarm signals generated by leak detectors (sensors) wirelessly without cabling work, reducing installation burden in large facilities. With local alarms (lamp/buzzer) on the transmitter, operators can verify events immediately on-site and respond faster. This transmitter solution is ideal for large plants and multi-zone sites where scalability and maintenance efficiency are critical.
● Wireless Alarm Transmission: Sends leak detection alarm signals wirelessly to minimize complex cabling work.
● On-Site Alarm Support: While transmitting to the receiver, the transmitter also activates local alarms (lamp/buzzer) for immediate confirmation.
● Sensitivity Adjustment Support: Helps stable operation by allowing sensitivity tuning to match site conditions and reduce false alarms.
● High Scalability (Up to 44 Channels): Add only the required channels using slot (card) modules, ideal for large facilities.
● Maintenance Efficiency: Modular construction simplifies inspection and replacement, reducing downtime and operating cost.
● Unified Design: Matches the design tone of Yoohantech standard leak alarm receivers (YH-200L series) for system consistency.
| Item | Specification |
| Model | YH-RF500L TX (Card-Type Wireless Leak Alarm Transmitter) |
| Power Supply | AC 220V 60Hz |
| Power Consumption | Max 30W |
| Power Indicator | Yellow lamp ON (Power ON) |
| Alarm Indicator | Red lamp ON (Alarm Activation) |
| Operating Temp./Humidity | -10–40°C, 0–80% RH |
| Buzzer | 70dB or higher (at 1m distance) |
| 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 |
| 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 |
| 1–2 |
H: 207 x W: 370 mm |
| 3–4 |
H: 293 x W: 400 mm |
| 5–6 |
H: 379 x W: 400 mm |
| 7–8 |
H: 465 x W: 400 mm |
| 9–10 |
H: 551 x W: 400 mm |
| 11+ | Custom-built upon request |
♣ Dimensions may vary depending on explosion-proof and warning light options. (Antenna excluded)
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