High-Precision Oceanographic & Hydrographic Instruments for Uncrewed Marine Vehicles (USVs, AUVs & ROVs)
MIDAS WLR Water level recorder for offshore environments

Water level recorder for offshore environments

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The MIDAS water level recorder is a high-performance instrument that is designed for offshore environments or regions where traditional shore-based tide gauges cannot be deployed, and is ideal for either long- or short-term deployments. It can be moored in line or to the seabed, and is available as a 500m acetal or 6000m titanium version.

The MIDAS WLR utilizes a state-of-the-art piezoresistive cell with internal temperature compensation for enhanced accuracy and resolution, and can be fitted with a choice of pressure sensor ranges to suit specific depth requirements. Data can be samples at up to 8Hz, and a variety of modes can be configured including continuous data output, triggered sampling, and data bursting.


Dimensions 88 x 550mm (sensor)
750 x 140 x 120mm (cage)
Weight 7kg (Acetal)
11kg (Titanium)
Power 0.3W (sampling)
<1mW (sleeping)
Depth Rating 500m (Acetal)
6000m (Titanium)
Temperature Range -5°C – +35°C
Accuracy ±0.01°C
Pressure Range 10, 20, 30, 50, 100, 300 or 600 Bar
Resolution 0.001% FS
Precision ±0.01% FS
Battery Life 125 days operation (alkaline) or 360 days (lithium), based on a 40 second burst sample every 10 minutes