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Tower drone

Wren Thermal

Night flights for hot joints and failing arresters.

Wren Thermal swaps the zoom camera for a high-resolution radiometric core and flies at night, when the sun can't fake a hotspot. It finds joints, clamps and arresters running hot under load.

Speed

54 km/h

Time out

38 minutes

Weight

3.3 kg

Range

7 towers per battery

Voltage

Any

Install

Truck launch, 90 seconds

Sensors

640 × 512 radiometric thermal · low-light visible

Priced

From $17,500 per drone

Overview

Night flights for hot joints and failing arresters.

Heat, measured

Every pixel carries a temperature, so a hotspot becomes a number your engineers can trend: 71.4 °C this month, 64 °C last month, 46 degrees above its neighbours.

Night by design

Flying after dark removes solar gain from steel and glass. What stays hot is heat the line is making, which is what you want to find.

Four ways of seeing the same span

Visible view: The shattered bell, in 4K.

Visible

The shattered bell, in 4K.

Thermal view: The clamp, 46 degrees too hot.

Thermal

The clamp, 46 degrees too hot.

Corona UV view: Discharge at the broken glass.

Corona UV

Discharge at the broken glass.

LiDAR view: The pine, 3.2 m from the wire.

LiDAR

The pine, 3.2 m from the wire.

The rest of the fleet

See it on your own line.

A 90-day pilot on your worst span, with a report every morning.

Insulators checked while you read
1
Conductor ridden since you arrived
0.00km
That’s the fleet on 412 spans right now.
Trondheim · 04:52

Head office

Brattørkaia 17, 7010 Trondheim, Norway

Field bases: Calgary · Denver

STRALEN

© 2026 Stralen AS · Org. 931 402 118

Made for the people who keep the lights on.

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