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Data Loggers with Depth Pressure and Temperature Sensors. | From advanced aquifer characterization to economical data collection, the In-Situ® Level TROLL® series of level/pressure instruments yields accurate level measurement and offers powerful data logging and flexible communications. With three models of self-contained data loggers available, you'll find an instrument suited to your application and budget. | | | | Level Troll 300 |  | - Integrated Modbus/RS485, SDI-12, and 4-20 mA communication protocols
- Connects to Frog RX unit for use as low-cost GSM/GPRS telemetry outstation
- Sensor accuracy of ±0.2% full scale.
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| Level Troll 500
|  | - Integrated Modbus/RS485, SDI-12, and 4-20 mA communication protocols
- Connects to Frog RX unit for use as low-cost GSM/GPRS telemetry outstation
- Narrow diameter body (18.3 mm OD)
- Sensor accuracy of ±0.1% full scale.
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| Level Troll 700
|  | - Integrated Modbus/RS485, SDI-12, and 4-20 mA communication protocols
- Connects to Frog RX unit for use as low-cost GSM/GPRS telemetry outstation
- Sensor accuracy of ±0.1% full scale.
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| | RuggedTroll 100/200 |  | - Designed for groundwater and surface-water monitoring
- Titanium construction for harsh conditions
- Modbus, RS485 or SDI12
- Linear, fast linear and event logging modes available.
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