Float operated instruments can be the most
accurate way to monitor water levels. The new
Starlevel Precision Level Instrument
can achieve operating accuracy and resolution
of 0.2mm. This accuracy is maintained for the
service life of the instrument without calibration or
maintenance, apart from periodic battery changes.
This instrument has the range to monitor surface
and underground waters, and the precision to
monitor rainfall and evaporation. It supersedes models 6541A, 6509 and
6531, models that have been installed
at more than 2500 sites.
The Starlevel interfaces with the surface of the water via a float and counterweight system. On
installation, the instrument is set to display the measured water
level. As the
water level changes, the input shaft rotates and an
optical encoder, mounted on the input shaft detects the movement. The encoder is continuously monitored, updating the LCD display as the
instrument tracks water level. The readings
can be recorded by an associated or integrated data logger.
The very low mechanical friction and inertia of the
instrument mean that it can produce data with high
precision and accuracy. A replaceable battery pack
powers the instrument for more than twelve months.
Practical design and rugged construction ensures
easy operation and long service life.
Specifications.
Range: Standard 0.0 to 65.5 or 299.99metres
Resolution: 1.0mm, 0.2mm or 0.1 inch, depending on the chosen float pulley
Accuracy: Same as resolution when a suitable float system is used
Display: Six digit LCD
Temperature: -10° to 60°C
Cable: 5 metres supplied. Up to 30 metres may be used
Dimensions: 275mm x 180mm x 1400mm (H x W x D)
Weight: 2.7kg (including battery)
Construction: Exterior PVC, aluminium and stainless steel
Enclosure: Rigid PVC IP65
Outputs: SDI-12 interface version 1.3 compliant
Dual HSIO channels. (Unidata High Speed Serial Interface).
Up to eight instruments can be daisy chained
Optional 4-20mA output
Power: Internal alkaline battery pack (Unidata Model 6910A)
Expected battery life >12 months.
External battery power 7-15V DC may be connected.
