Arborist / PowerSeat Ascenders

PowerSeat Gas Powered Ascender

Arborist / PowerSeat Ascenders

PowerSeat Gas Powered Ascender

Part No. PWRS-G

Safe working load (kN) 2.7 kN

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Speed Control

The unit is operated using a fail-safe dead man’s switch to control ascent speed, up to 15 m/min (49.2 ft/min).


The braking system controls descent and provides workers protection against free falls. The encapsulating jaw cover protects fingers and clothing from catching in the winch.


Stainless steel load-carrying gears and pins provide strength and durability. Sealed gearbox and high-load roller bearings reduce friction under load. Roller bearings are corrosion resistant and do not require lubrication.

Ergonomic Design

The PowerSeat is designed to stay in an upright position, conserving operator energy.

The Harken Industrial Gas PowerSeat ascender has revolutionized working at height, providing the worker with the ability to ascend quickly, stay in position longer, and work in comfort. The PowerSeat provides quality, convenience, safety, and is the best solution for completing a task on time. Fuel consumption varies with weight and usage, but the motor is extremely efficient and only uses a few liters of unleaded gas with 4-stroke mix for a full day’s work at height. The PowerSeat is simple to use and ideal for a wide range of applications, including wind turbines, building exteriors, and search and rescue – not only as a powered ascender, but also as a portable winch or hauler. The portable unit weighs just 14 kg (31 lb), so it’s easy to carry around, yet strong, durable, and corrosion-resistant.
Ascent speed with 120 kg/265 lb load (m/min)15 m/min
Ascent speed with 120 kg/265 lb load (ft/min)49 ft/min
Ascent speed with 273 kg/600 lb load (m/min)11 m/min
Ascent speed with 273 kg/600 lb load (ft/min)36 ft/min
Weight (kg)14.5 kg
Weight (lb)32 lb
Minimum line Ø (mm)10 mm
Minimum line Ø (in)3/8 in
Maximum line Ø (mm)12.7 mm
Maximum line Ø (in)1/2 in
Safe working load (kN)2.7 kN
Safe working load (kg)273 kg
Safe working load (lb)600 lb

The Harken Industrial PowerSeat is CE certified to the Machinery Directive and independently verified by Bureau Veritas.