Aqua TROLL 400 Multiparameter Probe
Legacy, economical probe for spot checks and short deployments
Aqua TROLL 400 Multiparameter Probe
An all-in-one, economical probe with a fixed sensor package. The Aqua TROLL 400 is the long-serving predecessor to the 500/600/700/800 line and remains a reliable, low-cost option for routine groundwater checks where a datalogger or handheld display supplies power and storage.
- Fixed sensor package — no field-swappable smart sensors
- Measures temperature, conductivity, dissolved oxygen, pH/ORP, and pressure/level
- Non-vented pressure sensor only
- SDI-12, Modbus RS-485, and RS-232 (via TROLL Com) communication
- Limited Bluetooth connectivity through an optional TROLL Com adapter
- No internal battery or memory — requires external power and a connected datalogger
- Operating temperature: -5 to 50 °C
Aqua TROLL 400 paired with a rugged handheld display for field spot-checking
Available Sensors
| Sensor | Notes |
|---|---|
| Temperature | Fixed |
| Actual / Specific Conductivity, Salinity, TDS, Resistivity, Density | Fixed conductivity sensor, multiple derived units |
| Dissolved Oxygen (RDO® optical) | Fixed |
| pH / ORP | Fixed |
| Water Level / Pressure | Fixed, non-vented only |
Specifications
| Spec | Value |
|---|---|
| Sensor Type | Fixed (non-interchangeable) |
| Pressure Rating | 150 psi (approx. 100 m / 328 ft, non-vented) |
| Power | External only — no internal battery |
| Data Storage | None onboard — logs via connected datalogger, controller, or PC |
| Interface | SDI-12, Modbus RS-485, RS-232 (via TROLL Com) |
| Bluetooth | Limited — via optional TROLL Com adapter |
| Software | Win-Situ 5, VuSitu (limited) |
| Wiper | Not available |
| Operating Temperature | -5 to 50 °C (23 to 122 °F) |
