OTT Pressure Level Sensor (PLS)

Measuring range 0 to 4 m, 0 to 10 m, 0 to 20 m, 0 to 40 m
0 to 13 ft, 0-33 ft, 0-66 ft, 0-131 ft
Resolution, pressure 0.01 % FS
Accuracy (linearity and hysteresis) ≤ 0.05% FS max
Long term stability (linearity and hysteresis) ≤ 0.1% FS max. per year
          SDI-12 output < 0.05 % FS
          4 - 20 mA output < 0.1 % FS at 20°C
Safe against overloads over 24 h up to 5 times the measuring range without permanent damage  
Temperature-compensated working range +23 °F to +113 °F (-5 °C to +45 °C) (ice-free)
Measuring range, temperature -13 °F to +158 °F (-25 °C to +70 °C) (ice-free)
Resolution, temperature 0.1 °C
Accuracy, temperature ±0.5 °C (output via SDI-12 only)
Units m, ft, bar, psi, °C

Power supply +9.6 to +28 V DC
Current consumption (SDI-12)  
          sleep < 400uA
          active < 3.6 mA
Measuring time  
          Warm-up time 500 ms
          Reaction time 500 ms
Interfaces (use as required) 4-20 mA, SDI-12, RS-485 (via SDI-12 protocol)
Cable length, interfaces  
          4 - 20 mA max. 1000 m
          SDI-12 max. 100 m
          RS-485 max. 1000 m

Pressure sensor Ceramic; temperature-compensated
Dimensions (L x Ø) 7.7” x 0.9” (195 mm x 22 mm)
Material Stainless steel (1.4462; V4A; UNS31803)
Temperature range, operating -13 °F to +158 °F (-25 °C to +70 °C)
Temperature range, storage -40 °F to +185°F (-40 °C to +85 °C)
EMC Directives  
          CE conformity EN 61000-4-2/3/4/5/6 and EN 55022 Class B (300…1000MHz)
Mechanical strength Meets the mechanical shock tests of IEC 68-2-32
Type of protection IP68
   
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