NKE Instrumentation

NKE Instruments manufacture a range of economical submersible instruments for in-situ measurements, suitable for both research and operational activities. They work closely in France with the Ifremer and CNRS institutes and have developed specialist equipment for Fisheries, Sediment studies and heat-flow monitoring as well as systems to measure corrosion and cathodic protection.


Autonomous multi-parameter probe for Conductivity, Temperature, Depth, Turbidity, Fluorescence, Dissolved Oxygen, pH,

Available physicochemical parameters:
Depth: range from 0 to 20m, accuracy : <0.06m, resolution : 0.006m
Temperature: range from -5°C to +35°C, accuracy <50m°C in the range 0-20°C, 13m°C at 10°C
Conductivity: range from 0 to 70mS/cm, ±0,05mS/cm in the range 10 to 60mS/cm
Salinity: range from 2 to 42 PSU, accuracy ±0.1 PSU

Dissolved Oxygen: using Aandera Optode optical sensor
Saturation: range from 0 to 120%, accuracy <5%, resolution : 0.01%
Concentration: range from 0 to 16mg/L, accuracy <5%, resolution 0.01%
Turbidity: using Seapoint optical sensor range (configurable at works) 25, 125, 500 or 750 FTU (non-linear above, max. 1500 FTU) Linearity <2%, deviation 0-750 FTU

Fluorescence: using Turner Design optical sensor Chlorophyll-a

pH: range 0 to 14pH, resolution 0.0003pH
Time: Internal clock with calendar (clock drift<1mn/month)
Energy autonomy: 18 months battery life, for a MP6 version at 5min recording rate
memory: 4Mb, >24 months at 5mn recording rate, 1 month at 10s recording rate, for a MP7 version
Mechanical characteristics: max. sizes : diameter 95mm, length 440mm, weight in the air 2,5kg

Water quality control, environmental survey and monitoring in shellfish farming

Autonomous Temperature, Pressure and Salinity data logger.
35m, 100m or 300m range.

Depth range: 35m Accuracy : 0.1m Resolution : 0.01m.
Depth range: 100m Accuracy : 0.3m Resolution : 0.03m.
Depth range: 300m Accuracy 0.9m Resolution : 0.09m.
Temperature range: 0°C to +30°C
Accuracy: 0.1°C (in the range +5°C/+25°C)
Resolution: 0.01°C
Salinity range: 2 to 40 PSU
Accuracy: 0.2 PSU (0.1 in reduced range).
Internal clock with calendar (+/-1.3min/month).
Automatic start: programmable pressure threshold triggering.
Sampling rate: programmable from 1s to 99hrs.
Memory autonomy: 20 days at 1s recording rate (C+T+D), doubled memory capacity available.
Energy autonomy: >3 years at 10min recording rate (factory replaceable lithium batteries).
Dimensions: 245 mm x 70 mm.
Weight in air: 970g.
Option: Housing protected against shocks (10mm thick vulcanised rubber).

The robustness and ease of use of the TPS are particularly adapted to the monitoring of water quality in coastal zones, especially in oyster and conchological beds.
The STPS is also used for salinity measurement for the validation of hydrographic models.

STPSMulti ParameterProbe

Autonomous Turbidity, Pressure and Temperature data logger.
20m, 100m and 300m range.


Turbidity Sensitivity: 0 – 750 NTU, possible to measure up to 2,000 TU.
Other measurement ranges upon request.
Resolution: < 0.03% Accuracy: < 2%.
Response time: < 2s (90%).
Depth Range: 20m (STBD20), maximum immersion depth : 30m,

Accuracy : 0.3% (6 cm), Resolution: 0.6 cm.
Depth Range: 100m (STBD100), maximum immersion depth : 200m,

Accuracy : 0.3% (30 cm), Resolution: 3cm.
Depth Range: 300m (STBD300) , maximum immersion depth : 400m,

Accuracy : 0.3% (90 cm), Resolution: 9 cm.
Temperature range: -5°C to +35°C
Accuracy: 50m°C from 0 to 20°C Resolution: 5m°C at 0°C
Response time: < 1s (90%).
Memory autonomy: 600,000 data points (1Mb with data compression).
Energy autonomy: 3 years at 10min sampling rate, 6 months at 1min.
Material: Plastic.
Dimensions: length 300 mm, diameter 26 mm.

STBD Sedimentology

The STBD allows measurement of turbidity or the concentration of suspended particles, in coastal or estuarine environment.
It can also be used for:
Evaluation of sediment transport
Evaluation of suspended biomass
Pollutant tracking
Tracking of river run-offs in deep ocean environment using profiling.
Also available in 6000m range and with reduced measurement ranges (down to 2.5NTU).

Operational remote-transmission multi-parameter probe

CharacteristicsNKE SMATCH DSC00239
Available parameters:
Depth: range 0 to 20m; accuracy < 0.06m; resolution 0.006m
Temperature: range -5°C to +35°C; accuracy <50m°C in the range 0-20°C; resolution 1m°C at 10°C
Conductivity: range 0 to 70 mS/cm: accuracy <0.05 mS/cm in the range 0 to 60 mS/cm; resolution 0.0012 mS/cm
range 0 to 2000 µS/cm: accuracy 5 µS/cm; resolution 0.04 µS/cm Salinity:

range 2 to 42 PSU at 20°C: accuracy ±0.1 PSU;
range 0 to 1.137 PSU at 20°C: accuracy <0.002 PSU; 

Dissolved Oxygen
Saturation: range 0 to 120%; accuracy < 5%
Concentration: 0 to 16mg/l; accuracy < 5%
Turbidity: Range (configurable at works) 25, 125, 500 or 750 FTU / 2.5 FTU on demand (non-linear above, max. 1500 FTU) – Seapoint Optical Sensor

Fluorescence: Chlorophyll a – Turner Design optical sensor
pH: Range 0 to 14pH Resolution 0.0003pH
Time: Internal clock with calendar (clock drift<1mn/month)
Energy autonomy: Depending on transmission, measurement and chlorination periods, examples for TI or TD type: 12 months with standard chlorination and daily data transmission.
Memory: 4Mb
SMATCH: diameter: 110 mm length: 425mm weight: 3.6kg
Buoy equipped with SMATCH, max. sizes: diameter.: 26cm length: 1750cm weight:11kg


Water quality control, environmental monitoring, monitoring in oyster culture zones, salinity and turbidity measurements for adjustments of hydrodynamical models.

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