Which impact meter should I choose?

When training in water sports, in addition to distance and speed, an important measure is stroke rate, for which several tools are available. 

Since 1978, Nielsen-Kellerman has been designing and manufacturing audio and measurement equipment for water sports and their combinations. Be it rowing, SUP, Ocean Canoe/Outrigger Canoe or kite boat. Their newest product group is weather and wind measuring devices. 

We offer several types of speedometers and speedometers, which differ in the amount of displayed values, their function, and their compatibility with other devices. 

Perhaps the most important difference between them is that the StrokeCoach only measures stroke rate using a three-axis gyroscope, not speed. SpeedCoach does everything Stroke Coach does and even measures speed using GPS. The Speedcoach GPS2 Training Pack does everything the first two do, and can be connected to multiple external devices via Bluetooth, has long-term memory and a programmable training function. 

In the following table, we have summarized the most important differences between the rowing stroke meter models. 

Model
Function	StrokeCoach Surge Rate	SpeedCoach GPS2	SpeedCoach GPS2 Training Pack
Hit number measurement	x	x	x
Number of hits	x	x	x
Timing	x	x	x
Auto launch after 1st hit	x	x	x
Memory function: last workout can be reviewed	x	x	x
Memory: several workouts can be reviewed	x	x	x
High contrast display	x	x	x
Automatic backlight	x	x	x
Holding string	x	x	x
Rubber Case	x	x	x
Carrying bag	x	x	x
2 year warranty	x	x	x
Speed ​​measurement without propeller		x	x
Speedometer propeller compatibility		x	x
Measuring distance traveled		x	x
Date / time display		x	x
Battery operation		x	x
Free software updates		x	x
Option to install Trainingpack afterwards (fee required)		x
Compatibility with Empower Oarlock			x
Compatibility with Bluetooth heart rate belt			x
Programmable workouts (intervals)			x
Data can be downloaded via Bluetooth			x

The SpeedCOach GPS2 + Training Pack pedometer is compatible with the NK Link application, which is compatible with Strava, and can be used to participate in NK's online competitions.