Aqua TROLL 400 multi-parameter probe

Introduction: A compact, durable multi-parameter process probe that can continuously measure 12 water quality parameters for multiple applications. The standard kit consists of 6 sensors that measure actual and specific conductivity, salinity, total dissolved solids, resistivity, density, optical dissolved oxygen, ORP, pH, temperature, water level, and water pressure.


The sensor adopts NIST tracking standard (where applicable) and is calibrated by the manufacturer

DO reading automatically compensates for salinity

Multiple power options and real-time readings

Easy installation, reduce errors and debugging time, improve efficiency

Long-term calibration reduces the number of visits to the site

Modbus/RS485 or SDI-12 protocol

Real-time access to data via radio, controller, data recorder, sampler, telemetry system or SCADA/PLC system

Application range:

Storm management

Coastal, estuary and marshland applications

Real-time water quality monitoring

Aquaculture water quality automatic monitoring

Long-term groundwater and water source monitoring

Technical specifications:
Operating temperature
-5 to 50℃
storage temperature
-40 to 65℃
4.7 cm x 26.9 cm with limiter (not including connector)
waterproof material
PVC, 316 stainless steel, titanium, acetal, fluorine rubber, PC/PMMA
Protection class
IP68 has all sensors and additional cables, IP67 has additional cables, but no sensors.
greatest pressure
150 psi at 0~50℃; 300 psi at 25℃
Output options
RS485 and SDI-12
Probe reading rate
One reading every 5 seconds (no internal record)
8-36 VDC (without internal battery)
Measuring current
16 mA @ 24 VDC
Sleep current
40 µA @ 24 VDC
In-Situ Con TROLL PRO system; In-Situ TROLL connected telemetry 101 or 201 system; SCADA/PLC; and third-party data logging, controller and telemetry system
Customizable, sealed (absolute), durable, vinyl or polyethylene
Water level, depth, pressure sensor
Typical ±0.1% FS @ 15℃; ±0.3% FS maximum, 0 ~ 50℃
76 m (250ft); absolute seal
±0.01 FS
Sensor type
Fixed type
Response time
Thermal equilibrium moment
Units of measurement
Pressure: psi, kPa, bar, mbar, mmHg Water level: mm, cm, m, in, ft
Compression resistor, ceramic
Conductive sensor
Typical ±0.5% + 1 µS/cm; ±1% maximum
5 ~ 100,000 µS/cm
0.1 µS/cm
Sensor type
Fixed type
Response time
Units of measurement
Actual conductivity (µS/cm, mS/cm) Specific conductivity (µS/cm, mS/cm) Salt (PSU) Total dissolved solids (ppt, ppm) Resistance (Ohms-cm) Density (g/cm3)
Method Std. 2510 EPA 120.1
Dissolved oxygen ROD sensor
±0.1 mg/L
±0.2 mg/L
±10% of reading
0 ~ 8 mg/L
8 ~ 20 mg/L
20 ~ 50 mg/L
0.01 mg/L
Sensor type
Fixed type, with alternative RDO sensor cap (1 year life)
Response time
T90: <45 seconds. T95: <60 seconds.
Units of measurement
mg/L,% saturation, ppm, ppO2
In-Situ Method 2

ORP sensor
±5.0 mV
±1400 mV
0.1 mV
Sensor type
Alternative, PH/ORP combined sensor
Response time
<15 seconds.
Units of measurement
Std. Method 2580
pH sensor
±0.1 pH
0 ~ 12 pH
Sensor type
Alternative, PH/ORP combined sensor
Response time
<15 seconds. PH7~PH4
Units of measurement
pH, mV
Std. Method 4500-H + EPA 150.2
Temperature Sensor
Sensor type
Fixed type
Response time
<30 seconds
Units of measurement
Celsius, Fahrenheit
EPA 170.1

Origin: United States
Configuration: Multi-parameter probe, replaceable combination pH/ORP sensor, RDO sensor cap, Win-Situ software, manual

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