• Compact Size
  • High accuracy
  • Direct digital output and programming via RS-232C
  • Built in real time clock with "ON/OFF" power control
  • Robust titanium housing
  • Long-term deployments for up to one year
  • Embedded micro-controller
  • 2 Mbyte non-volatile flash memory, preventing data loss in case of power failure
  • PC programmable measurement mode
  • Powered by commercially available lithium batteries

This miniature electromagnetic current meter provides the user with a maximum in flexibility. Small in size, the Compact EM records 2D current data virtually anywhere: in shallow waters, rivers, or confined spaces. This current meter has no fragile moving part and its Titanium housing will withstand even the toughest handling. This makes the instrument suitable for operation in rough conditions, or for deployment with ROVs.
The Compact EM records data in a two-megabyte Flash RAM which stores up to 179178 data sets of 2D velocity, instrument orientation, temperature and battery status.
Through Win98/Me/2000/XP software, the instrument can be programmed with a large variety of sampling strategies (such as interval sampling, burst sampling or burst averaged sampling) and data can be easily transferred to a PC.

Parameters Current speed Current direction Temperature
Sensor type 2-axis electro-magnetic
Hall element
Measuring range 0 to 500 cm/s 0 to 360 X -5 to 40 XC
Resolution 0.02 cm/s 0.01 X 0.001 XC
Accuracy 1 cm/s or 2 % 2 X 0.05 XC
Memory type 2 Mbyte flash memory
Memory capacity 179178 data
A/D converter 16 bits digital conversion
Measuring mode Continuous mode, Burst mode
Sampling interval 0.5 sec, 1 sec, 2 sec,5 sec, 10 sec, 15 sec, 20 sec, 30 sec
Burst interval 1 min to 1440 min
Number of samples 1, 10, 15, 20, 30, 60, 120, 180, 240, 300, 600, 1200
Battery type Lithium battery C type, 3.9V, 7 Ah
Power consumption 85 mA
Housing material Titanium
Weight 900 g in air, 550 g in water
Depth rating 1000 m
Tensile strength Approx. 2 kN(equivalent to 200 kgs)