Water sensor

SCW is a multi-sensor microsystem (MSM) to monitor for the presence of toxic chemicals (TICs), pollutants, hydrocarbons and organics in water.

At the core of SCW there is SENSIPLUS, the Sensichips microsensor platform that can interrogate on-chip and off-chip sensors with its versatile and accurate Electrical Impedance Spectrometer (EIS) and Potentiostat. Analytics  performed with EIS allow to exploit RedOx dynamics of catalytic noble metals to aid chemicals discrimination plus measurement of conductivity and permittivity spectra. The on chip Potentiostat is used for a number of different Voltammetric or Amperometric measurements and real time discrimination of pollutants.

By cycling the electrodes with overvoltage, the device prevents or mitigates formation of biofilms. SCW is a comprehensive multiparametric water analysis microsystem.

Thanks to its versatile analytical instruments and availability of on board catalytic Interdigitated Electrodes, SCW is also an excellent experimental microsystem for discriminative measurement techniques.

Specifications

ELECTRICAL
Supply Voltage 1.5-3.6V
Max Current 0.4mA continuous when reading on-chip sensors with EIS
Size 12x15mm, 3mm thickness
Interface I2C or SENSIBUS, single data wire multidrop sensor array cable interface, 1.5-3.6V
Unique Identifier OTP 48bits Unique Device Identifier, 16bits User Defined
ELECTRICAL IMPEDANCE SPECTROSCOPY
Frequency 3.1mHz to 1.2MHz
Vpp output sinewave 156mV to 2.8Vpp
Coherent demodulation 1st, 2nd or 3rd harmonic
Output Reciprocal of real or imagery component
Wide Measurement Range From ohms to 100MΩ
TEMPERATURE
Range -40°C to 125°C
Accuracy ±0.1°C
Thermodynamics calorimetry, enthalpy, exo/endothermic
ELECTROCHEMICAL METHODS
pH From 3 to 14, potential of Platinum vs Clads-Platinum
ORP total oxidation and reduction potentials
RedOx reduction/oxidation activity (free chlorine, hardness)
Voltammetry specific reduction or oxidation potentials
Anodic Stripping Voltammetry measures heavy metals
Electro-catalysis Noble metal IDEs measure current specifically
IMPEDANCE METHODS
Conductivity spectroscopy resistivity, salinity, EC, TDS, absorption dynamics
Dielectric spectroscopy turbidity, SS, biomass total/active, hydrocarbons detection

Measurements

Open Data

The following data is made available to data scientists, AI developers and it is free to use. The datasets have been acquired with the SCW water sensor and the SLM-Studio software, these are the same data we use to train our own machine learning models. 

Please, feel free to share results of your investigation with us.

Applications

  • Water quality: Drinking or waste water, river, sea, aquaculture
  • Precision farming: pH, moisture, nutrients, contaminants
  • Hydroponics, greenhouses
  • Production process: Wine, an/alcoholic beverages, milk
  • Food safety: Spoilage, temperature, humidity

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