Mahr Federal 817 CLM 2D Digital Gauge and Statistical Evaluator, 40″ Measuring Range, 0.00001″ Resolution, Motorized Carriage

Mahr Federal 817 CLM 2D Digital Gauge and Statistical Evaluator, 40″ Measuring Range, 0.00001″ Resolution, Motorized Carriage


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  • Description


The Mahr 817 CLM Digimar series 2D measuring gauge and statistical evaluator has a motorized carriage for measuring in one or two dimensions and uses optical incremental measurement, with a double-reader head and a dynamic probing system, for accuracy and repeatability. The gauge measures in 0.00001″ (0.0001mm) increments with a 40″ (1,000mm) vertical measuring range. It is programmable for automating repetitive measurement procedures and has an integrated temperature sensor for temperature-compensated measurement. The gauge has built-in functions for measurement and MarCom software for use with USB, RS-232, or Digimatic interfaces and a computer (sold separately), external memory (sold separately), or printer (sold separately). Its two-dimensional measurement capability allows functions such as calculating angles and coordinate transformation, and statistical evaluations such as histograms and Pareto diagrams. It has a backlit graphic LCD display and a rechargeable battery for up to 14 hours of operating time. This height-measuring gauge has a heavy-duty base for stability and a stainless steel slide with an air-bearing system for smooth movement, and is suitable for use in measuring heights and distances in applications such as quality control of machined parts on a production line.

Measuring range 1,000mm (40″)
Resolution 0.0001mm (0.00001″)
Measuring error (at working temperature) 1.8μm plus length in mm/600
Repeatability 0.5μm plane, 1μm bore
Measuring force 1.0 Newtons (+/- 0.2 N)
Operating temperature 10 to 40 degrees C (50 to 104 degrees F)
Working temperature 20 degrees C (+/- 1 degree C)
Maximum working humidity 65 percent (non-condensed)
Weight 77.16 lbs. (35 kg)
Dimensions 1,392 x 250 x 240mm (H x W x D)*

*H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.

Height gauges, sometimes referred to as gages, are precision measuring instruments that travel on a vertical column (also called the beam) to measure and/or mark the vertical distance from the base of an object in fine units. The vertical position of the gauge and its attached pointer are changed by turning a calibrated screw, or one or more feed wheels. Recorded rotations are read from a scale, a dial, counters, and/or an electronic display. A screw clamp holds the pointer to the gauge. The pointer is typically sharpened to act as a scriber, and can be used to mark a position on a workpiece by scratching its surface. On compatible units, the scriber may be replaced by an electronic touch-signal probe. Height gauges are typically used in manufacturing, machining, and mechanical engineering.

Mahr Federal manufactures dimensional metrology instruments and metering systems. The company, founded in 1861, is headquartered in Goettingen, Germany.

What’s in the Box?

  • 817 CLM Height measuring gauge
  • Probe carrier
  • Measuring probe
  • Setting block
  • Operating instructions
  • Power adapter
  • USB cable


  • Digimar series digital gauge with motorized carriage for use in measuring in one or two dimensions
  • Up to 40″ (1,000 mm) vertical measuring range with 0.00001″ (0.0001mm) increments
  • Programmable measuring procedures for automated measurement and statistical evaluation
  • Rechargeable battery for up to 14 hrs. operating time, power adapter
  • Optical incremental measurement with double-reader head and dynamic probing system for accuracy and repeatability