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Floater Crane Scale

If you have a wire rope with no dead end for load measurement, then the Floater Crane Scale may be the answer. The Floater rides on the cable via rollers and its roller configuration causes a slight deflection in the cable. As cable tension changes, the force applied to the load cell changes and weight data is displayed on a digital indicator. A properly installed Floater does not affect or interfer with spooling.


The Floater arm is anchored at one end to a fixed, solid point (i.e. the boom). The anchor point locks the Floater so it will not move with the wire rope and cause safety problems. Between the anchor point and the Floater body is an arm equiped with two "U" joints. The "U" joints allow the floater to move freely in all directions and therefore does not affect wire rope spooling. This structure creates the ultimate in wire rope mobility and operator safety.


Although the floater converts cable tension to a weight display, the system should be considered a safety device rather than a scale. Accuracy can be dependant on many site specific factors so field calibration must be performed. Based on these considerations, the floater is often used in applications such as vehicle mounted cranes and stationary equipment "lifts" in mines. Floater models vary based on cable size:

    • ½" to ¾" wire rope model
    • ¾" to 1¼" wire rope model
    • 1¼ to 1½" wire rope model


  • Used in tension applications where a dead end is not available for load measurement
  • This is a line rider that allows wire rope to move through it without interference
  • It does not use up crane head space
  • Handles load capacities for wire rope sizes specified.
  • Multiple options to display tension measurement

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Tension measurement can be displayed by an indicator via wired connection (see wired digital indicator). The cable connection between the floater crane scale and display can be a seal-over hard connect. This is suitable for installations where the crane scale is not expected to be disconnected from the indicator. Standard cable length is 60 ft but custom lengths can be provided as well.


External indicators can also be connected to the tension load cell via 4-pin military style quick-disconnects. This allows for easy disonnection and reconnection from the floater should the crane scale ever need to be moved, repaired, or stored. Quick disonnect cable comes in 10 ft, 20 ft, and 50 ft lengths.


Tension load can be displayed by external indicator that communicates wirelessly with the floater. Wireless floaters have a cabled connection to a wireless transmitter and battery box that then communicate with the indicator (see wireless digital indicator). The wireless floater is powered by 4 AA batteries with a life of 200+ hours of continuous use. The floater scale enters sleep mode when not in use to protect battery life and has wireless range of 40 meters line of sight.


The recommended indicator for tension applications is the M2000. If the crane is located outside, the M2000 should be purchased in a NEMA enclosure (see left photo) to protect against dust and water. Various enclosures are available (see below images) and more details about the M2000 are available in theindicators website.


The M2000 is available with a setpoint option card. These are overload detection and protection devices. Setpoints utilize solid state relays that can be used to trigger alarms or switch devices (i.e. motors) on or off at specified weights. When ordering the Setpoint option the type of device (AC or DC) being switched must be specified. Setpoints are frequently used in digital hanging crane scale applications.


The M2000 can be loaded with a special program that allows a hanging crane scale operator to adjust the indicator for multiple "Parts of Line". The program is configurable for one to twelve parts of line and the software will be provided free of charge when needed with the purchase of an M2000 indicator and a crane scale dynamometer.


Remote score boards are often referred to as "remote displays". This type of display must be used in conjunction with a digital indicator equipped with a serial output. The remote display mirrors what is displayed on the weight indicator. They are used in applications where weighing information needs to be seen at a distance from the indicator. Score boards are available in 2" (50 ft visibility), 4.5" (250 ft visibility) and 6.5" (300+ ft visibility) lettering.


We can supply 4-20 mA ouput versus standard mv/V signal. The design incorporates a load cell shield connection and polarity insensitive current loop connections. It is not susceptible to damage from shorting loop leads together or to ground during operation and is specifically designed for ESD hazardous environments. These converters are usually used in systems that use a PLC.

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