SePem 351
by Hermann Sewerin GmbH · 🇩🇪 Germany · Noise Loggers & Monitoring
SMART METERVERIFIEDStationary Noise Logger
The SePem 351 is a Stationary Noise Logger by Sewerin. The SePem® 351 is a stationary noise logger for continuous monitoring of drinking water networks. It features a highly sensitive piezo microphone and transmits data via LoRaWAN®, allowing for early detection of leaks.
Technical specifications
| Meter / product type | Stationary noise logger (LoRaWAN) |
| Application | Permanent leak monitoring of distribution networks (351 HY: trunk mains) |
| Detection method | Minimum night-noise level once per night, transmitted daily; leaks surfaced within ~3 days; traffic-light suspected-leak view |
| Sensor type | Structure-borne acoustic microphone (351 HY: hydrophone) |
| Communication | LoRaWAN to network information system / SePem WebApp |
| Protection class (IP) | IP68 (permanent submersion) |
| Housing material | Piezo microphone |
| Battery life | 9 years (maintenance-free) |
| Power / battery | Internal battery (9-year) |
| Outputs / software | SePem WebApp (traffic-light); SePort analysis; NIS integration |
| Mounting / installation | Magnet-mounted on existing fittings; up to ~500 m spacing |
| Deployment type | Permanent stationary |
✓ Compiled from the official manufacturer source. View source →
