Koden Construction Equipment

Koden's Drilling Monitors shape up to more intelligent utility device intended for more complex civil and foundation work.
The new DM-602R/604R with additional functions offer precise measurement, display and recording of perpendicularity of drilled holes and the shapes of cross-sections.


  • Easier and simpler to operate. You can manipulate the DM-602R/604R just like a home appliance.
  • Gain control switch, auto and manual, is provided.
  • Clear and precise records make your data reading and analysis easier.
  • Measurement range and depth data are indicated on the recording paper with wall face marks and numbers.
  • Furthermore, the recorded data can be output to an external PC via a built-in RS 232C output port.


Recorder unit

Measuring system

Ultrasonic echo sensing system

Recording system

Direct recording using the belt

Recording paper

Electrosensitive recording paper 250 mm x 20 m (DMP-250)

Measuring range (radius)

0.5 m, 1.0 m, 2.0 m, 4.0 m

Measuring accuracy

±2% at full scale

Power supply

100/110/120/220/240 VAC,
50/60 Hz 

Operating temperature

-10°C to +50°C (14°F to 122°F)

Winch unit

Up/down speed (Continuously controllable from the recording unit)

0 to 20 m/min

Up/down movable distance

100 m maximum

Bottom and casing sensing system

Automatic sensing by limit switch

Operating temperature

-10°C to +50°C (14°F to 122°F)