• Multiparameter System for Water Quality

Multiparameter System for Water Quality

  • Trimeter - Three Parameters at the Lowest Possible Cost
  • A Data Display for Every Application and Budget
  • The Manta family offers up to 12 sensors in one

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Event Triggering increases the frequency of data logging when a user-selected parameter changes by a certain amount over a certain time.

Digital Turbidity Sensor has built-in autoranging for excellent performance in near-zero FNU waters, with an upper range to 5000 FNU. Calibration Stability Indicator tells you when your sensor is stable enough for calibration. New Sensors include tryptophan/BOD, optical brighteners, bromide, calcium, and sodiumions, fDOM II, chlorophyll red, and transmissivity. Other new features include: Custom Parameter, Calibration Stability Indicator, opper-Gauze Antifouling Kit, Expanded Calibration Log, Raw Values, Aquarius™ Compatibility, Battery Voltage Indicator.


  • temperature
  • Depth
  • + any other single parameter including flourometers
  • Temperature
  • pH
  • Conductivity
  • optical DO (optional depth or ORP)
  • Temperature
  • pH
  • Conductivity
  • Turbidity
  • Temperature
  • pH
  • Conductivity
  • Optical DO (optional depth or ORP)
  • Turbidity
  • Sodium
  • Ammonium
  • Nitrate
  • Chloride
  • TDG
  • PAR
  • Chlorophyll
  • Blue-green algae
  • Rhodamine
  • Crude oil
  • Refined oil
  • Fluorescein dye
  • Optical brighteners
  • Tryptophan
  • Temp
  • pH
  • Conductivity
  • Optical DO
  • + Turbidity


Trimeter - Three Parameters at the Lowest Possible Cost
Get all the features of a Manta, including top-grade sensors and simple software, in an instrument designed for economy. Each Trimeter employs one of any sensor that Eureka offers, plus optional temperature and depth sensors.


A Data Display for Every Application and Budget

The AmphibianPlus is a waterproof, full-function Windows PDA the Manta user interface, with GPS and cell phone options. The Bluetooth Battery powers your Manta, and lets you talk wirelessly to the Manta with any Bluetooth-equipped Android or Windows peripheral. You can save up to $1500 by using your own phone instead of a limited-purpose data display.


One Job – One Instrument
The Manta family offers up to 12 sensors in one, integrated package. Available sensors include temperature, optical DO, pH, ORP, conductivity, depth, level, turbidity, fluorometers including chlorophyll a, chlorophyll red, phycocyanin, phycoerythrin, fDOM, fDOM II, rhodamine, fluorescein, crude oil, refined fuels, optical brighteners, and tryptophan/BOD, CO2, ammonium, nitrate, sodium, calcium, bromide, chloride, TDG, PAR, dual PAR, and transmissivity.


Field-Proven Methods to Minimize Fouling
The Extended Turbidity Brush cleans turbidity and other sensors, such as DO, chlorophyll, and BG algae. The MiniCleaner is a stand-alone wiper system used when you don’t have an Extended Turbidity Brush. The Copper-Gauze Kit wraps the sensors in copper gauze that slowly dissolves, bathing the sensors with the copper ions that discourage biofouling. Copper gauze is superior to solid copper, which become ineffective once oxidized.


Specificatons: Learn More

Lakes, Rivers, Ground Water, Storm Water, Estuaries, Streams, Ponds, Near-shore Oceanographic, Process Waters, Waste Waters, Laboratory Research

Site to Site Profiling Process Monitoring
Unattended Logging Ground Water
Telemetered Deployments Buoy Deployments


Length - w/o Battery Pack13.5"19"19"19"19"19"
- Add Internal Battery Pack22"27"27"27"
Weight - with IBP2.8 lbs2.4 lbs2.5 lbs5.0 lbs9.0 lbs10.0 lbs
Number of sensorsAny single sensor plus depth and temp optionUp to 6Up to 6Up to 7Up to 11Up to 13
Battery Pack3 "D"3 "D"3 "D"8 “C”6 “C”6 “C”
Operating Temperature-5 to 50 C
Depth Rating200 m, Max depth for ISE and TDG sensors is 15 meters
CommunicationsRS-232, SDI-12, USB or Bluetooth
Sample Rate1 Hz
Data Memory>1,000,000 logged readings
Size3.6" W x 7.25" L x 1.5" D
Weight1.3 lbs
Operating SystemMicrosoft® Windows Embedded Handheld 6.5.3
IP RatingIP68
Memory and Data Storage512MB RAM; 8 GB - > 8,000,000 logged readings
TemperatureTemperature-5 to 50 C0.010.1never needs calibration
pH/ORPpH0 to 14 units0.010.1 within 10 C of calibration, 0.2 otherwiserefillable reference electrode; corrected for temperature; typical sensor life > 4 years
ORP-999 to 999 mV120 mVplatinum ORP sensor is combined with pH sensor
TurbidityTurbidity0 to 40 FNU4 digits with maximum of two2% of reading or 0.2compensated for temperature; ltered for non-turbidity spikes; includes wiper to clean the optics
40-400 FNU2% of reading or 0.2
400-5000 FNU2% of range
Transmissivity0 to 100% transmission4 digitslinearity of 0.99R ²WETLabs SeaStar; mounts alongside the Manta
Dissolved Oxygen (optical sensor)Concentration0 to 20 mg/l0.010.1compensated for temperature and salinity; EPA approved "lifetime" luminescence method; typical sensor cap life > 4 years
20 to 30 mg/l0.010.15
30 to 50 mg/l0.15%
% Saturation0 to 500% saturation0.1%corresponds with the accuracy of the concentration reading
ConductivitySpecific Conductance, µS/cm0 to 5000 µS/cm4 digits with maximum of one decimal±0.5% of reading ±0.001corrected for temperature; four easy-to-clean graphite electrodes; optional sensor provides ±0.5% of reading accuracy to 100 mS/cm.
Specific Conductance, mS/cm0 to 10 mS/cm±1% of reading ±0.001
10 to 100 mS/cm1% of reading
100 to 275 mS/cm2% of reading
Salinity0 to 70 PSS0.010.2calculated from specific conductance; PSS = Practical Salinity Scale which is roughly equivalent to ppt
Total Dissolved Solids (TDS)0 to 65 g/l0.15% of readingcalculated from specific conductance
PressureDepth0 to 25 m0.010.05compensated for temperature and salinity; 0.05 m out of 25 m is 2" out of 100 feet; 0.4 m out of 200 m is a football length out of two football fields
0 to 200 m</td> 0.4
Vented depth (level)0 to 10 m0.0010.003mcompensated for temp, salinity, barometric pressure
Barometric pressure400 to 900 mm Hg0.11.5included with depth sensor
Total Dissolved Gas (TDG)400 to 1,400 mm Hg0.11compensated for temperature; maximum depth 15m
FluorometersChlorophyll a - blue0 to 500 µ g/l6 digits withmaximum of two decimalslinearity of 0.99R²highest-quality Turner Designs fluorometric sensors; fluorometers often require non-trivial calibration; custom optics available upon request
Chlorophyll a - red> 500 µ g/l
Rhodamine dye0 to 1000 ppb
Phycocyanin (freshwater BGA)0 to 40,000 ppb
Phycoerythrin (marine BGA)0 to 750 ppb
CDOM/fDOM0 to 1250 or 0 to 5000 ppb
CDOM/fDOM custom0 to 1250 or 0 to 5000 ppb
Optical brighteners0 to 15,000 ppb
Tryptophan0 to 20,000 ppb
Fluorescein dye0 to 500 ppb
Refined oil0 to 10,000pb
Crude oil0 to 1500 ppb
Ion-selective electrodes (ISE's)Ammonium0 to 100 mg/l as nitrogen0.15% or 2 mg/lcorrected for ionic strength (via conductivity readings); the accuracy speci cation relies on non-trivial maintenance practice and frequent calibration near the temperature of measurement; ammonium and nitrate require tip replacement every 3 - 6 months
Nitrate0 to 100 mg/l as nitrogen chloride
Chloride0 to 18,000 mg/l
Sodium0 to 20,000 mg/l
Calcium0 to 40,000 mg/l
Bromide0 to 80,000 mg/l
PARphotometric PAR4 digits5% of readingLiCor spherical sensor
Manta+ Multiprobe3 years *Underwater cables3 years
Amphibian2 Handheld2 yearsLeapfrog Bluetooth3 years (battery – 90 days)
Optical DO Cap3 yearsTurbidity Wiper2 years
*All sensors included except ISE's (Ammonia/nitrate/chloride); pH sensor included in 3 year warranty
Specifications indicate typical performance and are subject to change.