For unattended data collection, the Datasonde 4
logger can function without an external power
supply, cables or controls - or as a water quality
data transmitter when connected to the Surveyor 4
Data Display (optional) or RS-232 compatible data
handling device.
Series 4a instruments include the Datasonde 4a,
Minisonde 4a and Surveyor 4a display and logger. The
Surveyor 4a is available with optional GPS and
barometric pressure sensors. The Datasonde 4a can
measure up to 15 or more parameters. The Minisonde
4a is 1.75² in diameter, a light-weight unit well
suited for profiling or long term deployment.
The Series 4A instruments measure pH, dissolved
oxygen, temperature, and specific conductance as
standard parameters. It contains internal memory, an
internal battery pack, SDI-12 and RS-232 outputs,
and a weighted sensor guard. A low ionic strength
reference pH probe, a turbidity probe, a pH/ORP
probe, and a nitrate probe may be added to the
standard probes for specific applications. The
Surveyor 4 may be used to set up, calibrate and
review data collected by the Datasonde 4. An
underwater cable, calibration cable, and interface
cables, which are application dependent must be
ordered with this unit.
Hydrolab Series 4a Instruments are more versatile
and provide additional sensors including:
- Ammonia/Ammonium
- Nitrate
- Chloride
- Total Dissolved Gas
- Chlorophyll
- Transmissivity
- Ambient Light (PAR)
- (Shuttered) Turbidity
Record up to 120,000 measurements at
user-selected intervals and downloaded directly to a
PC or other data storage device. Users can define
logging run, including start-stop date and time and
logging interval.
All Series 4a instruments are covered by a two
year warranty, which is extendible to up to five
years. Please call for more information on
configurations. The Datasonde 4A is 3.5²D x 24.5²L.
Supplied with logging software, four standard
sensors, maintenance kit, instruction manual, sensor
guard, internal battery pack, and calibration/data
transfer cable. 15 m extension cable available for
use with Surveyor 4 data display
