Geological survey20230403

Environmental monitoring20230403

S&DL mini

S&DL (Sensor and Data Logger) mini is a water level meter with reasonable price and compact size of 22mm in diameter and 150mm in length only. User can choose type of cable based on the site conditions and usage purposes.

Read out value includes the water pressure and atmospheric pressure. When user measures the water level precisely, Barometer to measure the atmospheric pressure is needed to obtain the water pressure that is converted to the water level. One (1) Barometer covers a few square kilo meters, then at least one (1) piece is necessary in the target area.

Monitoring data is retrieved by two (2) ways, one way is via dedicated data communication cable connecting to a computer with S&DL mini software that the probe is stayed in the water at the monitoring depth and another way is to connect the prove to the computer directly that the prove is once drawn up from the water and is re-installed after readout of the data.

This instrument is single-use type and the battery life is generally 5 years. In case that the monitoring cycle is five (5) years or shorter, cost saving of the maintenance work and / or minimized renewal can be planned.

Many kind of monitoring fields / study, such as groundwater / surface water monitoring, field permeability / pumping test and so on, is covered by S&DL mini.

S&DL mini

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Features

  • The probe is built-in a data logger, battery, pressure transducer and temperature sensor.
  • No vent tube is needed, then any cable to install the instrument is selectable.
  • The instrument size is quite compact (φ 22 × L 150mm).
  • Several measurement ranges (5, 10, 20, 30, 100m) are available.
  • It can measure about 30,000 data stored in the mounted memory.
  • User can download S&DL mini software by free of charge.

Specification

Measurement ranges 5, 10, 20, 30, 100m and Barometer
Measurement accuracy Water level : 0.1% FS
Temperature : ± 0.3˚C
Measurement resolution Water level : 0.03% FS
Temperature : 0.1˚C
Operation temperature range Water level : -10 to +40˚C
Temperature : -20 to +50˚C
Battery life 5 years (based on 1 reading / 5 minutes)
Clock accuracy ± 6 minutes/year
Maximum storage data 30,000
Interface USB
Communication speed 9600bps
Measurement rates 0.5 seconds to 99 hours
Altitude input -300 to 5,000m
Barometric compensation High accuracy Barometer
Size φ22 × L150mm
Weight Approx. 0.135kg

Barometer

Ranges Air only
Measurement accuracy Air : 0.1% FS
Temperature : 0.1˚C
Measurement resolution Air : 0.03% FS
Temperature : ± 0.3˚C
Operation temperature range Air : -10 to +40˚C
Temperature : -20 to +50˚C
Battery life 5 years (based on 1 reading / 5 minutes)
Clock accuracy ± 6 minutes / year
Maximum storage data 30,000
Interface USB
Communication speed 9,600bps
Measurement rates 0.5 seconds to 99 hours
Altitude input -300 to 5,000m
Size φ22 × L150mm
Weight Approx. 0.135kg

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