Hydrolab MiniSonde


Engineered for dependable performance and durability in the field, the Hydrolab Minisonde 5 (MS5) offers a compact and lightweight multiprobe design for either profiling or unattended long term monitoring.

With a diameter of only 45mm (1.75”) the MS5 is perfect for the monitoring of 50mm (2”) environmental monitoring wells.

Features & Benefits

Packed full of features, the MS5 can measure up to ten parameters simultaneously. It is also capable of measurements using LDO optical sensor technology.

  • Blue Green Algae
  • Chlorophyll a
  • Conductivity
  • Depth / Vented Level
  • Dissolved Oxygen
  • Ion-Specific Electrodes (Ammonia, Ammonium, Nitrate, Chloride)
  • ORP (Redox)
  • pH
  • Rhodamine WT
  • Surveyor 4a
  • Temperature
  • Total Dissolved Gas
  • Turbidity


  • Spot check water chemistry analysis.
  • Unattended monitoring of boreholes & waterways.
  • Open water profiling of lakes and marine environments.
  • Can be used in conjunction with remote solar powered telemetric system.

Technical Specifications

Product Specifications Description
Size Outer diameter – 4.4cm (1.75”)Length – 53.3cm (21”)

Length (with battery pack) – 74.9cm (29.5”)

Weight 1.0kg (2.2lbs)(with battery pack) – 1.3kg (2.9lbs)
Computer interface RS-232, SDI-12, RS-485
Memory 120,000 measurements
Battery supply 8 AA batteries
Operating temperature -5 to 50° C
Maximum depth 225m

Calibration Videos & Tips

ECO Environmental now offers the Inspectra Laser methane gas detector for hire. The Inspectra Laser is a methane-specific monitoring device which is ATEX rated and can detect from as low as 1ppm.More...