# General Specifications

<table><thead><tr><th width="374">Attribute</th><th align="center">Value</th></tr></thead><tbody><tr><td>Maximum Depth Rating</td><td align="center">300 m</td></tr><tr><td>Device Diameter</td><td align="center">108 mm</td></tr><tr><td>Device Height</td><td align="center">48 mm</td></tr><tr><td>Weight in Air</td><td align="center">550 g</td></tr><tr><td>Weight in Water</td><td align="center">135 g</td></tr><tr><td>Maximum Operating Height (above target plane)*</td><td align="center">25 - 50 m</td></tr><tr><td>Minimum Operating Height**</td><td align="center">50 cm</td></tr><tr><td>Maximum Operating Speed***</td><td align="center">5 kts</td></tr><tr><td>Number of velocity sensors</td><td align="center">3</td></tr><tr><td>Sensor down-angle from horizonal</td><td align="center">70 degrees</td></tr><tr><td>Angular Operating Envelope, Degrees off vertical</td><td align="center">0 to 10 degrees</td></tr><tr><td>Ping Frequency</td><td align="center">675 kHz</td></tr><tr><td>Ping Repetition Rate</td><td align="center">5 – 20 Hz</td></tr><tr><td>V-in power Voltage Min and Max</td><td align="center">10V to 30V DC</td></tr><tr><td><p>V-in power average</p><p>(power averaged over 1 second)</p></td><td align="center">2.5 Watts average</td></tr><tr><td>V-in Power, peak (largest current spike during operation irrespective of voltage)</td><td align="center">5 Watts</td></tr><tr><td>Ethernet support****</td><td align="center">10/100 Mbps</td></tr><tr><td>Serial Comms Voltage Levels****</td><td align="center"><p>3.3V TTL or</p><p>5V TTL, auto-sense</p></td></tr><tr><td>Serial parameters, default****</td><td align="center">115,200, 8 , N, 1</td></tr></tbody></table>

{% hint style="info" %}
\*Achieved maximum height is dependent on several variables, including tilt of the sensor head, flatness of the target plane, hardness of the target plane, vegetation cover on the target plane, and salinity. On a hard-bottom body of water such as Minnesota's Lake Superior, we regularly achieve 50 meters. On a muck-bottom lake such as Minnesota's Lake Minnetonka, we sometimes struggle to get 30 meters.
{% endhint %}

{% hint style="info" %}
\*\*Assuming the sensor head is oriented parallel to the target surface.
{% endhint %}

{% hint style="info" %}
\*\*\*Maximum speed may vary with height above target plane.
{% endhint %}

{% hint style="info" %}
\*\*\*\*The recommended interface is Ethernet. Serial interface is possible with a user-supplied custom cable. Some features, such as mavlink2rest communication, are lost when using serial.&#x20;
{% endhint %}


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