--- title: "Eureka Water Probes Manta2 Water Quality Sondes | Aethair" description: "Eureka Manta+ multiparameter water-quality sondes in the Aethair sensor catalog: 9 models for pH, DO, conductivity, turbidity, fluorometers, and ISEs." url: https://aethair.io/sensors/eureka-water-probes-water-quality-sondes/ --- Sensors · Water Quality Sondes # Eureka Water Probes Manta2 Water Quality Sondes Eureka (Solinst) Manta+ multiparameter water-quality sondes: configurable sensor sets for temperature, pH, ORP, conductivity (salinity/TDS), optical dissolved oxygen, turbidity, depth/level, and barometric pressure, plus Turner fluorometers (chlorophyll, CDOM/fDOM, rhodamine, crude oil, fluorescein, tryptophan, optical brighteners), ISEs (chloride, ammonium/ammonia, nitrate), and dissolved CO₂. Read over Eureka's Manta ASCII protocol, so the parameter set follows whichever sensors are fitted. [Schedule a call](https://calendly.com/d/ctdd-mkr-v9v/aethair-demo-website) [Build a Configuration](https://aethair.io/build/?params=water_temperature,ph,orp,specific_conductance,salinity,tds,turbidity,do) At a glance **18** parameters **9** models [**Connects via Thiamis** RS-232 · ASCII · SDI-12](https://aethair.io/products/thiamis/) 2 standards limit what it measures - [EPA drinking water EPA National Drinking Water Standards](https://aethair.io/standards/epa_ndwr/) - [EPA aquatic life EPA Ambient Water Quality Criteria (Aquatic Life)](https://aethair.io/standards/epa_aquatic_life/) Measures ## What the Eureka Water Probes Manta2 Measures 18 parameters, each linked to its page: the sensors, units, and standards behind it. [Water Temperature °C / °F](https://aethair.io/parameters/water_temperature/) [pH pH / mV](https://aethair.io/parameters/ph/) [ORP mV](https://aethair.io/parameters/orp/) [Specific Conductance µS/cm / mS/cm](https://aethair.io/parameters/specific_conductance/) [Salinity PSU](https://aethair.io/parameters/salinity/) [TDS mg/L](https://aethair.io/parameters/tds/) [Turbidity NTU](https://aethair.io/parameters/turbidity/) [Dissolved Oxygen %Sat / mg/L](https://aethair.io/parameters/do/) [Chlorophyll µg/L](https://aethair.io/parameters/chlorophyll/) [fDOM / CDOM µg/L](https://aethair.io/parameters/fdom/) [Chloride mg/L](https://aethair.io/parameters/chloride/) [Ammonium (NH₄) mg/L-N](https://aethair.io/parameters/ammonium/) [Dissolved Ammonia (NH₃) mg/L-N](https://aethair.io/parameters/ammonia/) [Nitrate (NO₃) mg/L-N](https://aethair.io/parameters/nitrate/) [Ion-Selective (Other Ions) µg/L / RFU / ppb](https://aethair.io/parameters/ion/) [Dissolved CO₂ mV](https://aethair.io/parameters/dissolved_co2/) [Water Level / Depth m / ft / psig](https://aethair.io/parameters/water_level/) [Barometric Pressure mmHg](https://aethair.io/parameters/pressure/) [Connects via **Thiamis**](https://aethair.io/products/thiamis/) Wired interfaces [RS-232 ASCII](https://aethair.io/products/thiamis/#port-rs232) [SDI-12](https://aethair.io/products/thiamis/#port-sdi-12) Models ## Eureka Water Probes Manta2 Models 9 models, each with what it measures and the ranges its datasheet gives. | Model | Description | Measures & specs | | - | - | - | | **Manta+ 20** | Compact 1.95 in sonde (up to 6 sensors) for spot-checks and monitoring: temperature, pH, optical dissolved oxygen, and conductivity (with salinity/TDS), plus optional ORP and depth. No turbidity, fluorometer, or ISE bay. | [Water Temperature](https://aethair.io/parameters/water_temperature/) [pH](https://aethair.io/parameters/ph/) [ORP](https://aethair.io/parameters/orp/) [Specific Conductance](https://aethair.io/parameters/specific_conductance/) [Salinity](https://aethair.io/parameters/salinity/) [TDS](https://aethair.io/parameters/tds/) [Dissolved Oxygen](https://aethair.io/parameters/do/) [Water Level / Depth](https://aethair.io/parameters/water_level/) | | **Manta+ 25** | 2.45 in sonde (up to 6 sensors): the +20 core with one wipered slot that takes turbidity, optical DO, or a single Turner fluorometer (chlorophyll, CDOM/fDOM, or a rhodamine/crude-oil/fluorescein/tryptophan/optical-brightener dye tracer). Optional ORP and depth; no ISE bay. | [Water Temperature](https://aethair.io/parameters/water_temperature/) [pH](https://aethair.io/parameters/ph/) [ORP](https://aethair.io/parameters/orp/) [Specific Conductance](https://aethair.io/parameters/specific_conductance/) [Salinity](https://aethair.io/parameters/salinity/) [TDS](https://aethair.io/parameters/tds/) [Turbidity](https://aethair.io/parameters/turbidity/) [Dissolved Oxygen](https://aethair.io/parameters/do/) [Chlorophyll](https://aethair.io/parameters/chlorophyll/) [fDOM / CDOM](https://aethair.io/parameters/fdom/) [Ion-Selective (Other Ions)](https://aethair.io/parameters/ion/) [Water Level / Depth](https://aethair.io/parameters/water_level/) | | **Manta+ 30** | 2.95 in sonde (up to 7 sensors; 30A/30B): wipered turbidity, temperature, pH, optical DO, and conductivity, optional ORP/depth and Turner fluorometers, with one ISE bay on the 30B (chloride, ammonium with derived ammonia, or nitrate). ISE depth limited to \~15 m. | [Water Temperature](https://aethair.io/parameters/water_temperature/) [pH](https://aethair.io/parameters/ph/) [ORP](https://aethair.io/parameters/orp/) [Specific Conductance](https://aethair.io/parameters/specific_conductance/) [Salinity](https://aethair.io/parameters/salinity/) [TDS](https://aethair.io/parameters/tds/) [Turbidity](https://aethair.io/parameters/turbidity/) [Dissolved Oxygen](https://aethair.io/parameters/do/) [Chlorophyll](https://aethair.io/parameters/chlorophyll/) [fDOM / CDOM](https://aethair.io/parameters/fdom/) [Chloride](https://aethair.io/parameters/chloride/) [Ammonium (NH₄)](https://aethair.io/parameters/ammonium/) [Dissolved Ammonia (NH₃)](https://aethair.io/parameters/ammonia/) [Nitrate (NO₃)](https://aethair.io/parameters/nitrate/) [Ion-Selective (Other Ions)](https://aethair.io/parameters/ion/) [Water Level / Depth](https://aethair.io/parameters/water_level/) | | **Manta+ 35** | 3.5 in full-suite sonde (up to 11 sensors; 35A: 2 fluorometers + 2 ISEs, 35B: 3 fluorometers): the complete core suite plus Turner fluorometers, chloride/ammonium/nitrate ISEs, dissolved CO₂, barometric pressure, and depth, with a universal wiper. | [Water Temperature](https://aethair.io/parameters/water_temperature/) [pH](https://aethair.io/parameters/ph/) [ORP](https://aethair.io/parameters/orp/) [Specific Conductance](https://aethair.io/parameters/specific_conductance/) [Salinity](https://aethair.io/parameters/salinity/) [TDS](https://aethair.io/parameters/tds/) [Turbidity](https://aethair.io/parameters/turbidity/) [Dissolved Oxygen](https://aethair.io/parameters/do/) [Chlorophyll](https://aethair.io/parameters/chlorophyll/) [fDOM / CDOM](https://aethair.io/parameters/fdom/) [Chloride](https://aethair.io/parameters/chloride/) [Ammonium (NH₄)](https://aethair.io/parameters/ammonium/) [Dissolved Ammonia (NH₃)](https://aethair.io/parameters/ammonia/) [Nitrate (NO₃)](https://aethair.io/parameters/nitrate/) [Ion-Selective (Other Ions)](https://aethair.io/parameters/ion/) [Dissolved CO₂](https://aethair.io/parameters/dissolved_co2/) [Water Level / Depth](https://aethair.io/parameters/water_level/) [Barometric Pressure](https://aethair.io/parameters/pressure/) | | **Manta+ F35** | Anti-fouling +35: the same 3.5 in, up-to-11-sensor suite fitted with a copper nose-cone and universal wiper for extended deployments in fouling-prone water. | [Water Temperature](https://aethair.io/parameters/water_temperature/) [pH](https://aethair.io/parameters/ph/) [ORP](https://aethair.io/parameters/orp/) [Specific Conductance](https://aethair.io/parameters/specific_conductance/) [Salinity](https://aethair.io/parameters/salinity/) [TDS](https://aethair.io/parameters/tds/) [Turbidity](https://aethair.io/parameters/turbidity/) [Dissolved Oxygen](https://aethair.io/parameters/do/) [Chlorophyll](https://aethair.io/parameters/chlorophyll/) [fDOM / CDOM](https://aethair.io/parameters/fdom/) [Chloride](https://aethair.io/parameters/chloride/) [Ammonium (NH₄)](https://aethair.io/parameters/ammonium/) [Dissolved Ammonia (NH₃)](https://aethair.io/parameters/ammonia/) [Nitrate (NO₃)](https://aethair.io/parameters/nitrate/) [Ion-Selective (Other Ions)](https://aethair.io/parameters/ion/) [Dissolved CO₂](https://aethair.io/parameters/dissolved_co2/) [Water Level / Depth](https://aethair.io/parameters/water_level/) [Barometric Pressure](https://aethair.io/parameters/pressure/) | | **Manta+ 40** | Largest Manta (4.0 in, up to 13 sensors): hosts up to three Turner fluorometers plus three ISEs alongside the full core suite, dissolved CO₂, barometric pressure, and depth. | [Water Temperature](https://aethair.io/parameters/water_temperature/) [pH](https://aethair.io/parameters/ph/) [ORP](https://aethair.io/parameters/orp/) [Specific Conductance](https://aethair.io/parameters/specific_conductance/) [Salinity](https://aethair.io/parameters/salinity/) [TDS](https://aethair.io/parameters/tds/) [Turbidity](https://aethair.io/parameters/turbidity/) [Dissolved Oxygen](https://aethair.io/parameters/do/) [Chlorophyll](https://aethair.io/parameters/chlorophyll/) [fDOM / CDOM](https://aethair.io/parameters/fdom/) [Chloride](https://aethair.io/parameters/chloride/) [Ammonium (NH₄)](https://aethair.io/parameters/ammonium/) [Dissolved Ammonia (NH₃)](https://aethair.io/parameters/ammonia/) [Nitrate (NO₃)](https://aethair.io/parameters/nitrate/) [Ion-Selective (Other Ions)](https://aethair.io/parameters/ion/) [Dissolved CO₂](https://aethair.io/parameters/dissolved_co2/) [Water Level / Depth](https://aethair.io/parameters/water_level/) [Barometric Pressure](https://aethair.io/parameters/pressure/) | | **Trimeter** | Single-sensor probe (1.95 in): hosts any one sensor from the Manta range (turbidity, optical DO, pH/ORP, a Turner fluorometer, or an ISE) plus optional temperature and depth. Read over the same Manta protocol, one parameter at a time. | [Water Temperature](https://aethair.io/parameters/water_temperature/) [pH](https://aethair.io/parameters/ph/) [ORP](https://aethair.io/parameters/orp/) [Specific Conductance](https://aethair.io/parameters/specific_conductance/) [Salinity](https://aethair.io/parameters/salinity/) [TDS](https://aethair.io/parameters/tds/) [Turbidity](https://aethair.io/parameters/turbidity/) [Dissolved Oxygen](https://aethair.io/parameters/do/) [Chlorophyll](https://aethair.io/parameters/chlorophyll/) [fDOM / CDOM](https://aethair.io/parameters/fdom/) [Chloride](https://aethair.io/parameters/chloride/) [Ammonium (NH₄)](https://aethair.io/parameters/ammonium/) [Dissolved Ammonia (NH₃)](https://aethair.io/parameters/ammonia/) [Nitrate (NO₃)](https://aethair.io/parameters/nitrate/) [Ion-Selective (Other Ions)](https://aethair.io/parameters/ion/) [Dissolved CO₂](https://aethair.io/parameters/dissolved_co2/) [Water Level / Depth](https://aethair.io/parameters/water_level/) [Barometric Pressure](https://aethair.io/parameters/pressure/) | | **EasyProbe 20** | Fixed-configuration, budget member of the Manta family (1.95 in): temperature, optical dissolved oxygen, conductivity (with salinity/TDS), and pH, over SDI-12/Modbus/RS-232. | [Water Temperature](https://aethair.io/parameters/water_temperature/) [pH](https://aethair.io/parameters/ph/) [Specific Conductance](https://aethair.io/parameters/specific_conductance/) [Salinity](https://aethair.io/parameters/salinity/) [TDS](https://aethair.io/parameters/tds/) [Dissolved Oxygen](https://aethair.io/parameters/do/) | | **EasyProbe 30** | EasyProbe 20 plus a turbidity sensor (2.95 in), with an optional internal logging battery pack. | [Water Temperature](https://aethair.io/parameters/water_temperature/) [pH](https://aethair.io/parameters/ph/) [Specific Conductance](https://aethair.io/parameters/specific_conductance/) [Salinity](https://aethair.io/parameters/salinity/) [TDS](https://aethair.io/parameters/tds/) [Turbidity](https://aethair.io/parameters/turbidity/) [Dissolved Oxygen](https://aethair.io/parameters/do/) | Standards ## Standards for What It Measures Standards that set limits on the parameters it reports. [EPA drinking water EPA National Drinking Water Standards 5 of its parameters](https://aethair.io/standards/epa_ndwr/) [EPA aquatic life EPA Ambient Water Quality Criteria (Aquatic Life) 2 of its parameters](https://aethair.io/standards/epa_aquatic_life/) Solutions ## Where the Eureka Water Probes Manta2 Is Used Solutions whose recommended configuration uses this instrument or whose standards it is built to, followed by solutions whose core panel it partly measures. ### [Water Quality Monitoring](https://aethair.io/solutions/water-quality/) Rivers, lakes, drinking water, and stormwater ### [Aquaculture & Fish Farming](https://aethair.io/solutions/aquaculture/) Dissolved oxygen, temperature, and ammonia control ### [Hydrology, Level & Flow](https://aethair.io/solutions/hydrology/) Flood warning, stream gauging, and groundwater On the platform ## What the Eureka Water Probes Manta2 Gets From Aethair Connected through Thiamis, its readings arrive in the same Environet account as Aethair's own monitors. ### [Live data and alerts](https://aethair.io/platform/environet/) [Environet](https://aethair.io/platform/environet/) shows the instrument live and alerts the people you choose by email, SMS, and webhook, at the thresholds you set. [Noesis](https://aethair.io/platform/noesis/) sets up a dashboard, a report, or an alert from a plain-text request. ### [Compliance reports](https://aethair.io/platform/reports/) [Aethair Reports](https://aethair.io/platform/reports/) produces scheduled or on-demand reports from the instrument's readings, as a PDF or secure link. Templates cover Aethair Blue, WELL v2, cabin air (ISO 23875), and the CMS-2567 healthcare codebook (ASHRAE 170), or you can report against custom limits such as OSHA PELs, NAAQS, EPA guidance, or your own program limits. ### [Dashboards and the app](https://aethair.io/platform/dashboards/) Environet dashboards and the [Aethair App](https://aethair.io/platform/app/) show the instrument's readings just like any Aethair device. The occupant-facing [Aethair Dashboards](https://aethair.io/platform/dashboards/) status display is built around Aethair IAQ and Aethair PRO. Similar ## Other Water Quality Sondes ### [In-Situ](https://aethair.io/sensors/in-situ-water-quality-sondes/) [Water Quality Sondes](https://aethair.io/sensors/in-situ-water-quality-sondes/) [In-Situ TROLL instruments: submersible (IP68) water-level and multiparameter loggers. Level TROLL…](https://aethair.io/sensors/in-situ-water-quality-sondes/) ### [Spectra Scientific](https://aethair.io/sensors/spectra-scientific-water-quality-sondes/) [Water Quality Sondes](https://aethair.io/sensors/spectra-scientific-water-quality-sondes/) [Spectra Scientific (spectrascientific.com) Spectra Litmus configurable multiparameter water-quality…](https://aethair.io/sensors/spectra-scientific-water-quality-sondes/) ### [YSI](https://aethair.io/sensors/ysi-water-quality-sondes/) [Water Quality Sondes](https://aethair.io/sensors/ysi-water-quality-sondes/) [YSI multiparameter water-quality sondes (Xylem): the current EXO platform and the legacy 6-series…](https://aethair.io/sensors/ysi-water-quality-sondes/) Questions ## Eureka Water Probes Manta2 FAQ How does the integration read a Manta, and why does the parameter list depend on the individual sonde? The Thiamis Manta driver speaks Eureka's Manta ASCII protocol over RS-232 (19200 8-N-1). Each interval it asks the sonde for its header row, matches every column by name against a fixed table, then reads the data row positionally. It therefore ingests exactly the sensors configured on that particular sonde. The parameter set is per-unit, not fixed per model. Which Eureka Manta sensors can this integration not read? Because columns are matched by name, several real Eureka sensors have no entry in the driver and are silently dropped: blue-green algae (phycocyanin/phycoerythrin), the refined-oil and PTSA fluorometers, the sodium, calcium, and bromide ISEs, Total Dissolved Gas (TDG), PAR, and transmissivity. If one of these is fitted, its column is ignored; only the parameters listed here are ingested. Is the pressure reading water pressure or barometric pressure? Barometric. The Manta reports barometric pressure in mm Hg from its internal barometer (used to compensate vented depth and TDG). Water depth is reported separately as Depth, Vented Depth, or Stage (m/ft/psig), which map to Water Level. Why is channel 31 chloride when older screens showed blue-green algae? Backend channel 31 is wired to the chloride ISE (the sonde's Cl column, mg/L); an earlier platform label read it as 'BG' in cells/mL, which was a mislabel and has been corrected to Chloride. No blue-green-algae column exists in the driver, so BGA is never ingested regardless of the sensor fitted. How are ammonium and ammonia reported? The ISE senses ammonium (NH4+, mg/L-N). The Manta software computes un-ionized ammonia (NH3, mg/L-N) from pH, conductivity, and temperature, and also total ammonia (NH3 + NH4). Both ammonia figures map to the Ammonia parameter. Why do pH and CO₂ appear in millivolts? The integration ingests the raw electrode signals: pH as both pH units and electrode mV, and dissolved CO₂ as raw mV. The CO₂ sensor's ppm conversion is done on the standalone display and is not sent over this protocol. Sources: [www.waterprobes.com](https://www.waterprobes.com/product-page/manta-35) · [www.solinst.com](https://www.solinst.com/instruments/solinst-eureka/water-quality-sondes/manta-plus-multi-parameter-probes/)