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Although part of the history of drilling rigs, the hydraulic pancake and its drill floor gauge provide a less accurate solution for weighing the drill string. Because of limited accuracy combined with the effects of temperature change on the load indication, this solution is increasingly being replaced by electronic compression transducers which have signals that do not suffer from temperature variations as they are temperature compensated.
Available in triple channel execution, this solution is perfect for the current auto drill requirements for safety and reliability of signals.
These sensors integrate three 4-20mA amplifiers in an enclosure mounted on the side of the sensor and are delivered with the male connector of your choice.
Another, more expensive version, with cable gland entry provides a field serviceable enclosure with accessible wire terminations allowing a severed cable to be replaced on-site by any skilled electrician. There is no need to remove the transducer to replace it with a spare one or to send it back to the manufacturer for repair.
Load cells often used for this type of application
