Indicating or recording apparatus with provision for the special purposes referred to in the subgroups

Child Classifications

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• G01D 3/02 with provision for altering or correcting the law of variation
• G01D 3/028 mitigating undesired influences, e.g. temperature, pressure
• G01D 3/06 with provision for operation by a null method
• G01D 3/08 with provision for safeguarding the apparatus, e.g. against abnormal operation, against breakdown
• G01D 3/10 with provision for switching-in of additional or auxiliary indicators or recorders