1. The most advanced of the new Distance sensors has everything you  could wish for from a distance sensor:

• Several hundred working hours; varies with the setting
• Short charging time
• Charging while attached to the doors
• Programmable sending effect
• Programmable updating speed
• Multifunctional: Can also be combined with DoorAngle, Depth and other functions, either when acquired or later with a simple download of a license.
• Programmed from the bridge
• Automatic programming of bridge unit and sensor 

Also the two other types; a simpler one without direct connection to the bridge unit, with simple Angle function built in, and upgrading possibilities, as well as a very simple, non-upgradable variation, which has some of the features mentioned above:

2. The one has many of the same features as the one above, but also lack some of the properties. It can show Angle sectors, a simple angle representation that gives good control over the door angles, but not as detailed as a normal Angle sensor.

Distance sensors can later be upgraded so that they have full functionality on the same line as the most advanced sensors.

3. The simplest variation is a direct replacement for previous Distance sensors. It has large battery capacity and is quickly charged, but cannot be programmed.

The two last variations also represent a great advancement for those with older generation bridge systems (CGM, RX-400, C600 and 4000 systems).

The Distance sensors have probably been the sensors that have meant the most to many fishermen, even though some will probably consider Trawleye, TrawlSpeed/Symmetry or Catch sensors as the most important, not to mention the new DoorAngle sensors.  

If you ignore Bucket effect and Twist of the trawl, the trawl doors’ function is what means the most of efficient trawl fishing.  

When Scanmar introduced the Distance sensors more than 25 years ago, the battery technology was a big problem, and we chose two different updating speeds, which both were acceptable in order to not charge so often. What is interesting is that producers, who later have tested the market, have chosen the exact same updating, which confirms that the choice we made 25 years ago was not bad.  

All the new Distance sensors from Scanmar are mounted on the doors in the same way as the Angle sensors; they are mounted in holders that are welded directly on to the doors, parallel with the door, and not like it is usually done by cutting a hole into the door, even though this is more costly to produce because of the sensors’ construction, amongst others because it demands two acoustic senders, one on each side.  

The advantages are first and foremost that the same sensors can be upgraded to also show the DoorAngles; as it is 100% required that the sensors be mounted on the doors’ vertical and horizontal direction. Besides, the sensor pockets will not stick out on the doors’ backside and thereby reduce the square force because of the affect on the current-picture.  

Scanmar’s new series of Distance sensors have the same measurements and shape as the DoorAngle sensor, and uses the same way of mounting, which is welded directly on to the doors.