OTT PLS - Technical Data; Water Level Specifications; Temperature Specifications

11 Technical Data
Water level
Measuring range 0 … 4 m water column (0 ... 0.4 bar)
0 … 10 m water column (0 ... 1 bar)
0 … 20 m water column (0 ... 2 bar)
0 … 40 m water column (0 ... 4 bar)
0 … 100 m water column (0 ... 10 bar)
Resolution (SDI-12 interface) 0.001 m; 0.1 cm; 0.01 ft;
0.1 mbar; 0.001 psi
Accuracy (linearity + hysteresis)
SDI-12 interface ≤ ± 0.05 % of full scale
4 … 20 mA interface ≤ ±0.1% of full scale;
10 ppm/°C at 20 °C
Long-term stability (linearity + hysteresis) ≤ ± 0.1 %/a of full scale
Zero point drift ≤ ± 0.1 % of full scale
Units m, cm, ft, mbar, psi
Overload protection for the measuring cell
(without permanent mechanical damage)
0 ... 0.4 bar 4 bar
0 ... 1 bar 10 bar
0 ... 2 bar 15 bar
0 ... 4 bar 25 bar
0 ... 10 bar 40 bar
Pressure sensor ceramic, capacitive; temperature-
compensated
Temperature-compensated operating range –5 °C … +45 °C
Temperature
Measuring range –25 °C … +70 °C
Resolution 0.1 °C
Accuracy ± 0.5 °C
Units °C, °F
Temperature sensor NTC
Supply voltage +9,6 … +28 V DC, typically 12/24 V DC
Current consumption
SDI-12 sleep mode < 600 µA
SDI-12 active mode < 3.6 mA
Interfaces SDI-12 version 1.3
RS-485 (SDI-12 protocol)
4 … 20 mA; 2-wire (scaleable)
Reaction times
Boot time 5,000 ms
Measuring time <2,000 ms
Storage temperature –40 °C … +85 °C
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