Marine thunderstorm detector for offshore lightning warning

BTD-350

Marine thunderstorm detector for offshore lightning warning, detecting cloud-to-cloud, cloud-to-ground and intra-cloud lightning up to 83 km, with quasi-electrostatic sensing, RS422 or Ethernet output and IP66 housing.
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Introduction

Marine and offshore operations need lightning information early and without nuisance alarms. The BTD-350 detects major lightning types out to 83 km and monitors local electric field changes and charged precipitation, helping teams start safety procedures before overhead lightning becomes a direct threat.
 
Its passive quasi-electrostatic principle uses three antennas to sense low-frequency atmospheric field disturbances rather than man-made radio noise. This gives strong immunity to EM interference, supports a false alarm rate below 2% and delivers 95% detection efficiency for a single flash, rising to 99–99.9% for storms with multiple flashes within 56 km.
 
Designed for large vessels, offshore installations and helideck monitoring, the detector connects via RS422 serial or Ethernet and can trigger alarms through optional volt-free relays. IP66 stainless steel and powder coated aluminium construction operates from -40 °C to +60 °C and is certified for marine EMC, salt spray and vibration.

Marine confidence
Certified for salt spray, vibration and marine EMC for on- and offshore use
83 km detection
Detects lightning up to 83 km with 10 m range resolution
Earlier warnings
Monitors electric fields and charged precipitation before the first discharge
Low false alarms
Quasi-electrostatic sensing delivers a false alarm rate below 2%
Flexible outputs
RS422 or Ethernet output, with optional relays for local warning devices
Certified detection
Meets EN50536 Class 1 and IEC 62793 Class A performance requirements

Features

Quasi-electrostatic principle

Three antennas sense low-frequency atmospheric electric field disturbances generated by lightning discharges.

Lightning type detection

The detector identifies cloud-to-cloud, cloud-to-ground, cloud-to-air and intra-cloud discharges.

Output and reporting

RS422 serial or Ethernet output reports self-test status, thunderstorm warning status, flash time, flash range and optional direction.

Optional relay module

Three volt-free relay contacts provide caution state, warning state and alert state for autonomous local alarms.

Direction finding option

The optional direction-finding module provides storm direction information with 1° resolution.

User configuration

Warning thresholds and relay disabled times are user configurable to match site operating requirements.

Marine construction

Reinforced stainless steel and powder coated aluminium construction supports marine and offshore installation.

PC display and logging

Supplied software provides display and logging functions for direct computer-based monitoring.

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