conductivity probe / Pt1000 / multi-parameter
36XiW-CTD series

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conductivity probe conductivity probe - 36XiW-CTD series


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The 36 Xi W series is built on the latest-generation microcontroller platform, which KELLER has
developed to meet extremely high precision requirements and increase compatibility with a wide variety of interfaces. Along with pressure (level) information, digital interfaces also transmit other water parameters such as temperature and conductivity.

RS485 Robust interface with differential gauges, for lines up to 1,4 km in length. Modbus RTU and proprietary KELLER bus protocol

SDI-12 Standard interface for environmental monitoring, ideal for battery operation

The 36 Xi W series is based on the proven KELLER 36 X W series using the high-quality
10 L-series pressure transducer. All series X pressure level transmitters feature an RS485 interface, which provide pressure and temperature standard, while versions requiring higher accuraty, temperature or conductivity sensor are available options. Multi-parameter probes fitted with pressure, temperature and conductivity sensors (CTD – conductivity, temperature, depth), are approximately 90 mm longer.

36 Xi W Pressure sensor: accuracy 0,02 %FS

Temperature sensor: accuracy 0,5 °C or 0,1 °C

36 Xi W CTD Pressure sensor: accuracy 0,02 %FS
Temperature sensor: accuracy 0,1 °C
Conductivity sensor: accuracy 2,5% of the selected measuring range 4 ranges:
0,2 / 2 / 20 / 200 mS/cm

Both versions can be supplied configured for absolute pressure (measured relative to a vacuum
→ PAA) or relative pressure (fitted with capillary tubes for measuring relative to atmospheric
pressure → PR).