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Bollard Pull Tests
Bollard pull tests - tug boats / drag force measurement

Bollard pull trials are conducted in order to determine the static pull that a tug is able to employ in operating conditions. Unlike ground vehicles, the statement of installed horsepower is not sufficient to understand how strong a tug is - this is because other factors, like transmission losses, propulsion type, propulsion system efficiency, have an influence as well.

Dynamometers are used for force and load control, including drag force measurement, for example: Bollard pull test, drag force measurement of rescue vehicles, plows, etc.

Ron dynamometers are especially suitable for force measuring due to these following features:

The Ron Dynamometer and load cell series offer separation of the load cell and display, i.e. a remote display that can be read by the operator of the vehicle, tug boat or tractor, etc. in their cabin, in comfort and safety. 

Ron dynamometers and load cells are specially adapted for force measurement in off-shore environments; For example: Bollard pull test. Ron systems are rated at IP 65 and two higher sealing levels are available: 

A) Special offshore type connectors, in place of the standard ones, increase the sealing level to IP 67. 

B) A higher rating than this is the load cell with an underwater capability option that enables it to be submerged in water (up to 1ft/0.5m), briefly, without causing harm. The sealing level with this option is IP 68-1.