KRE Series Extensometers
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OVERVIEW

A KRE Series extensometer continuously measures ground surface displacement and uses cartridge pens to directly record that movement onto chart paper wound on a cylindrical drum. A motion stake is inserted into the moving earth surface to be monitored and another stake is fixed to a landslide monitor. The two stakes are connected via an Invar wire and any minute displacement between the two points is detected and recorded. NOTE: The alarm contact is set at the factory to switch to ON whenever land movement exceeds a predetermined parameter within the one-hour period after operation commences or within any succeeding hour thereafter. When land movement does not exceed the specified parameter per hour, the alarm contact remains in OFF status.

SPECIFICATIONS

8-Day Extensometer KRE-8, KREA-8 (w/alarm)
Measurement range	0-60 mm (minimum increment 0.2 mm)
Recorded ratio	5X
Paper feed speed (selectable)	4 mm/h for 1-day use or 0.5 mm/h for 8-day use (12 mm/day)
Alarm contact	No-voltage output
(Selectable between ±2 mm or ±4 mm)
Power source	One C-cell battery
Size	Approx. 248 × 207 × 170 mm
Weight	Approx. 5 kg
32-Day Extensometer KRE-32, KREA-32 (w/alarm) Measurement range 0-60 mm (minimum increment 0.2 mm) Recorded ratio 5X Paper feed speed (selectable) 1 mm/h for 8-day use (24 mm/day) or 0.25 mm/h for 32-day use (6 mm/day) Alarm contact No-voltage output (Selectable between ±2 mm or ±4 mm) Power source One C-cell battery Size Approx. 344 × 218 × 170 mm Weight Approx. 6.5 kg