Submersible Sulphide/H2S Probe

Accurate - Reliable - Small Dimensions - Easy Handling

The determination of total dissolved sulphide (sum of dissolved H2S, HS- and S2-) is one of the most important parameters for the analysis of natural waters and waste water in industry.
It is necessary to observe the total sulphide concentration, dissolved in water, to avoid any danger because of the evaporation of the very toxic H2S. H2S is able to block oxygen transporting enzymes leading to the death because of inner suffocation. On the other hand, the total dissolved sulphide concentration is an interesting parameter for scientists of several scientific departments. They use this parameter for the assessment of natural lakes, but also for instance to understand volcanic activities.
But due to a lot of the hydrogen sulphide’s inconvenient chemical properties, like high chemical reactivity, very fast oxidation in the presence of oxygen and the fast concentration exchange between the liquid sample and the gaseous phase above (mostly air), the determination is difficult. Even though the sampling and the determination have been done very carefully, the results are uncertain and mostly disappointing.

All these disadvantages could be avoided, if the new Submersible H2S/Sulphide Probe is used for accurate and reliable the insitu determination in depths of up to 100 m.

Special Features

Sensors for H2S (amperometric micro-sensor), temperature, pH and depth
Very easy sensor exchange
Windows based software for display of chemical/physical units and diagrams
Free selection of displayed parameters (H2S or total dissolved sulphide, T, pH)
Titanium made housing and protection cage
Subconn titanium connector
Very small dimensions (48 mm diameter, 440 mm total length)
Low weight of 1 kg
Small and low-weight cable (6 mm diameter)
Low running costs for chemical sensor replacement

The Submersible H2S/Sulphide Probe is equipped with a precision microprocessor-controlled 4-channel 16 bit analogue to digital converter. The data are available as RS-232 signal (multi-conductor polyurethane covered cable) and optional as FSK signal modulated on constant current (single-conductor cable).
The probe can be powered by battery or DC power supply (9 to 30 V DC) when using the RS-232 output or by constant current with FSK telemetry output (coaxial connection) for longer distances. An interface for constant current supply is available.

Probe with removed protection cage.
Sensors for H2S, pH, temperature and depth.

Technical Data

  • 4-channel probe
  • RS-232 Interface for probe configuration, telemetry output, data readout
  • Standard Data Acquisition Software “SST-SDA” for Windows 95, 98, 2000

Dimensions and weights

  • Probe diameter: 48 mm
  • Protection cage length: 140 mm
  • Total length: 440 mm
  • Weight in air: 1 kg

Electrical Features

  • Input power and RS 232 Interface are galvanic isolated from measuring circuitry
  • Power supply voltage: 9…30 V DC
  • Connector: Subconn MCBH4M
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