Manta + Water Quality Sonde

  • Available in a Variety of Sizes Options - 1.95 inch to 4 inch Variable sonde sizes are available dependent on sensor installation
  • Measurement of up to 24 Parameters on One Manta 2 We will help you decide the best suited sensors for your application
  • Suitable for Handheld and Unattended Monitoring
  • Built-In Datalogger Store >1,000,000 readings
Product Options
Battery Pack
mantaMobile Bluetooth® battery pack
Android Bluetooth-equipped tablet with rugged field enclosure
Copper anti-fouling kit
Flow cell
Pipe kit
SDI-12 Converter Box
Carry Case - Large
Carry Case - Small


Manta+ water quality sondes are suitable for use in any natural water from -5°C to 50°C. It can be used as an unattended logger, used for spot testing and profiling with use of a tablet / PDA or installed with wireless telemetry systems.

Ideal applications for our water quality sonde include groundwater interaction, saltwater intrusion, surface water, reservoir and lake monitoring, estuary monitoring, watershed and source water protection, beach monitoring, storm water runoff, NPS monitoring, NPDES discharge, wastewater influent, effluent, vertical profiling, process water and aquaculture.

Different sizes of sonde are available depending on which sensors the user intends on installing. The Manta + sizes (outside diameter)available are 1.95 inches, 2.45 inches, 2.95 inches, 3.5 inches and 4 inches. All sizes are 19 inches in length including the weighted sensor guard and cable locking sleeve.

Available parameters:

  • Temperature
  • Optical DO
  • Conductivity (SC)
  • Salinity
  • TDS
  • Turbidity
  • ORP
  • pH
  • Depth
  • Level
  • Ammonium
  • Nitrate
  • Chloride
  • TDG
  • Chlorophyll a
  • Rhodamine
  • Blue Green Algae

Sensor Details:

Optical Dissolved Oxygen Sensor
The optical dissolved oxygen sensor has no replaceable membranes or caps and requires no circulator. It provides exceptional accuracy and uses luminescent dissolved oxygen technology. It is insensitive to hydrogen sulfide (H2S) compared to polargraphic DO sensors and is not damaged by sunlight.

Turbidity Sensor
The turbidity sensor is highly accurate up to 3000NTU's. It has a self cleaning wiper that is user programable up to 5 wipes to remove biological growth or debris.

Chlorophyll a Sensor
The Chlorophyllsensor accurately measures in 3 ranges from 0.03 to 500 ug/L. It has ambient light and turbidity rejection circuitry and fast response time and compact design. An adjustable secondary standard is available for calibration and quick check.

Blue-Green Algae Sensor
The Blue-Green Algae sensor accurately measures in 3 ranges from 0 - 2,000,000 cells/mL Cyanobacteria (phycocyanin or phycoerythrin). It identifies potential algae blooms and provides substantial cost savings by eliminating cell counting.

Rhodamine WT Sensor
The Rhodamine WT Sensor measures accurately in 3 ranges from 0.04 to 1000 ppb. It is available with a secondary standard for quick and accurate calibration. Accurate readings and a fast response time are ensured with its ambient light rejection and fast response time. Small sample size volume design and high quality optics provide turbidity rejection

Depth sensors are available in 5 ranges from 0 - 200 meters in absolute or vented. It has automatic temperature and salinity compensation.

Temperature Sensor
The temperature sensor is a 30k ohm thermistor and has a 316 Stainless Steel housing. The temperature sensor is used to provide compensation for Specific Conductance, Dissolved Oxygen, pH, and Ion Selective Electrodes.

pH Sensor
The pH sensor is easily maintained. It has a rebuildable reference with PTFE/FEP Junction so there is no sensor to replace.

Conductivity Sensor

A very accurate sensor for measuring conductivity, specific conductance, salinity and TDS. It requires virtually no maintenance and is accurate up to 100,000 uS/cm. It automatically compensates temperature.

The Ammonia Ion Selective Electrode with replaceable plasticized tips and has a maximum depth of 25 meters. It provides automatic calculation of ammonia and total ammonia concentrations. It is designed for agricultural industry and fertiliser runoff in fresh water. Ammonia ISE's will not work in sea water and interfering ions will effect reading.

The Chloride Ion Selective Electrode with replaceable plasticized tips and has a maximum depth of 25 meters. It is ideal for measurement of saltwater intrusion or as an effective tracer for pollution.

Nitrate Ion Selective Electrodes
The Nitrate Ion Selective Electrode with replaceable plasticized tips and has a maximum depth of 25 meters. It provides automatic correction of temperature and automatic compensation for ionic strength concentrations.

Manufactured by: Eureka
Model: Manta + Water Quality Sonde

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Groundwater interaction
Saltwater intrusion
Surface water
Reservoir and lake monitoring
Estuary monitoring
Watershed and source water protection
Beach monitoring
Storm water runoff
NPS monitoring
Vertical profiling


Temperature Sensor
Parameter Range and Units Resolution Accuracy
Temperature -5 to 50°C 0.01 ±0.1

pH/ORP Sensor
Parameter Range and Units Resolution Accuracy
pH 0 to 14 units 0.01 ±0.1 within 10°C of calibration; 0.2 otherwise
ORP -999 to 999 mV 0.1 ±20 mV

Transmissivity Sensor
Transmissivity 0 to 100% transmission 0.01 linearity of 0.99 R2

Dissolved Oxygen (optical sensor)
Parameter Range and Units Resolution Accuracy
Concentration 0 to 20 mg/l 0.01 ±0.1
20 to 30 mg/l 0.01 ±0.15
30 to 50 mg/l 0.01 ±5% of reading
% saturation 0 to 500% saturation 0.1 corresponds with the accuracy of the concentration reading

Conductivity Sensor
Parameter Range and Units Resolution Accuracy
Specific conductance, µS/cm 0 to 5000 µS/cm 0.1 ±0.5% of reading or ±1 w.i.g.
Specific conductance, mS/cm 0 to 100 mS/cm


±1% of reading ±0.001
100 to 275 mS/cm 0.001 ±2% of reading
Salinity 0 to 70 PSU 0.01 ±2% of reading
Total dissolved solids (TDS) 0 to 65 g/l


±5% of reading

Pressure Sensor
Parameter Range and Units Resolution Accuracy
Depth 0 to 25 m 0.01 ±0.05
0 to 200 m ±0.4
Vented depth 0 to 10 m 0.001 ±0.003
Barometric pressure 400 to 900 mm Hg 0.1 ±1.5
Total dissolved gas (TDG) 400 to 1400 mm Hg 0.1 ±1

Parameter Range and Units Resolution Accuracy
Chlorophyll a - blue 0 to 100 µg/l 0.01 Linearity of 0.99 R2
Chlorophyll a - red 0 to 500 µg/l
Rhodamine dye 0 to 200 ppb
Phycocyanin (freshwater BGA) 0 to 4500 ppb
Phycoerythrin (marine BGA) 0 to 700 ppb
CDOM/FDOM 0 to 500 ppb
Optical brightener 0 to 300 ppb
Tryptophan 0 to 5000 ppb
Fluorescein dye 0 to 150 ppb
PTSA 0 to 650 ppb
Refined oil 0 to 20 ppm
Crude oil 0 to 300 ppb

Ion-selective electrodes (ISE's)
Parameter Range and Units Resolution Accuracy
Ammonium 0 to 100 mg/l as nitrogen 0.1 ±10% of reading or 2mg/L w.i.g.
Nitrate 0 to 100 mg/l as nitrogen
Chloride 0.5 to 18,000 mg/l
Sodium 0.05 to 20,000 mg/l
Calcium 0 to 40,000 mg/l
Bromide 0 to 80,000 mg/l

PAR Sensor
Parameter Range and Units Resolution Accuracy
Photometric PAR 10,000 µmol/cm2 0.1 ±5% of reading

Parameter Range and Units Resolution Accuracy
Carbon dioxide 0 to 2000 ppm 0.1 ±3% of full scale



Related products


TDS is only relevant in freshwater systems as salinity will dramatically increase the conductivity and therefore apparent TDS.
TSS are particles that are larger than 2 microns found in the water column. Anything smaller than this is called a dissolved solid.
The EBP is a removable lithium-ion battery pack that converts a standard multiprobe to a stand-alone deployable logger.
The EBP is 3in/75mm diameter.
All Mantas and Trimeters between 2 and 3.5in
Yes, if you order the Passthrough version.
Simply remove and connect to the charger (supplied separately)
Yes, the EBP has been subject to rigorous testing and is designed for IP68 indefinite immersion.
The EP provides can provide many months of logging depending on number of sensors and log frequency.
Simply locate the peg, push and twist
Yes, new top can be ordered to convert your existing unit.
Where can I see more? – Eureka have produced a video that does a great job of explaining the different versions and showing what they look like.