ORP DO TDS pH Multi-Parameter Water Tester

Know your water before the fish do — a multi-parameter water quality tester that reads dissolved oxygen, pH, ORP, TDS, conductivity, salinity and temperature in one device, in handheld and online versions, so you can catch a crash before it costs you a tank.

  • ParametersDO · pH · ORP · TDS · EC · salinity · temp
  • DO sensorOptical (fluorescence)
  • FormHandheld & online/inline
  • ProtectionIP-rated housing
ORP DO TDS pH Multi-Parameter Water Tester
ISO 9001 CE OEM / ODM

15+ years in aquaculture engineering · Trusted by Japfa Group, Japan Nissui & Tropo Farms · Shipped worldwide in one container

Product Description

  1. Separation of water and electricity, analyzer combined with a filtering function.
  2. 2. Panasonic PLC, faster data processing, long-term stable operation
  3. 3. High temperature and high-pressure resistant valves imported from Japan, operating normally in harsh environments.
  4. 4. Digestion tube and measuring tube made by Quartz material to ensure high accuracy of water samples.
  5. 5. Set the digestion time freely to meet the customer’s special demands.

Advantage:

● pH glass electrode measurement method, applied to various PH/ORP monitoring and dosing control occasions;
● Support a variety of installation methods, wall mounting, pipe clamp installation, and panel installation;
● Clock and historical data recording function to meet higher data management requirements;
● Record 14,000 historical data and the recording interval can be set between 1 and 999 minutes;
● The protection grade of the enclosure is IP66;
● Two settable SPST multifunctional relays;
● Two high-precision 0/4~20mA current outputs;
● A two-wire RS485 interface, the communication protocol is MODBUS RTU;
● 128*64 large LCD screen, multiple languages available;
● The menu password can be set to facilitate hierarchical management;
● The meter can not only perform temperature compensation on the test sample, but also self-check the operating temperature of the instrument, compensate for the hardware temperature changes caused by temperature drift, and make the test results more accurate;
● Provide AC and DC power supply modes, both of them are the wide-voltage power supplies.

Orp do tds conductivity ph multi parameter water quality monitor meter
Orp do tds conductivity ph multi parameter water quality monitor meter
Orp do tds conductivity ph multi parameter water quality monitor meter

Video of Water Quality Monitor Meter


Application

Orp do tds conductivity ph multi parameter water quality monitor meter
Orp do tds conductivity ph multi parameter water quality monitor meter

Specifications

Models & configuration

Model combinations integrated from industry practice — measuring ranges and accuracies are confirmed against SIGMA's actual instruments per order.

ModelCapacityTypical useCore configuration
SIGMA-WT-PDaily spot checks
SIGMA-WT-MComprehensive spot testing
SIGMA-WT-O24/7 continuous monitoring
SIGMA-WT-SPLC closed-loop control
Measured parametersDissolved oxygen (DO) · pH · ORP · TDS · conductivity · salinity · temperature (per model combination)
DO sensingOptical fluorescence (stable, low-maintenance, preferred) or electrochemical
Form factorsPortable handheld meters and online/inline probes
Water typeFreshwater / saltwater
Display & dataDigital display with data logging; control models add alarm and control outputs
ProtectionIP-rated housings for humid farm environments
OptionsCalibration solutions, spare electrodes/probes, remote monitoring, PLC integration

System composition

One device, every key parameter

DO, pH, ORP, TDS, conductivity, salinity and temperature in a single meter — no rack of separate instruments.

Optical DO sensing

Fluorescence sensors give fast, stable dissolved-oxygen readings with minimal recalibration — the parameter that matters most in high-density RAS.

Handheld and online formats

Spot-check patrols plus 24/7 inline monitoring cover the whole farm.

Closed-loop capable

Connected models feed a controller to trigger oxygen, aeration or alarms automatically.

Farm-proof build

IP-rated, fresh- and seawater probes stand up to humid farm environments.

Logged and traceable

Water-quality trends are recorded, so problems are flagged early and decisions are data-backed.

Application

  • Real-time DO, pH and water-quality risk monitoring in RAS and high-density farms
  • Sensitive water control in hatcheries and nurseries
  • Salinity and conductivity monitoring in seawater farms
  • Intake and discharge water compliance testing
  • Closed-loop oxygen control with oxygen cones, generators and aerators

Video

ORP DO TDS pH Multi-Parameter Water Tester

FAQ

Frequently asked questions

What parameters does the multi-parameter water tester measure?

A single meter reads dissolved oxygen (DO), pH, ORP, TDS, conductivity, salinity and temperature, available as portable handheld units for spot checks or online/inline probes for continuous 24/7 monitoring.

Why is dissolved oxygen the most important reading in RAS?

In high-density RAS an oxygen crash moves fast and DO is the parameter that matters most. Optical (fluorescence) DO sensors give fast, stable, low-maintenance readings so you can act before a problem becomes a loss.

Can the water tester trigger aeration automatically?

On connected models the data can be logged, displayed and wired into a controller to trigger oxygen, aeration or alarms automatically.

Does the meter work in seawater?

Yes — probes are built for both fresh- and sea-water, and the rugged, IP-rated housings stand up to humid farm environments.

Request a tailored quote

Tell us your species, target density and site — our engineers size the system and reply within one business day.

or contact our engineers →

ORP DO TDS pH Multi-Parameter Water Tester Request a Quote