Measure surface water levels
Overview
Reliable, accurate and robust - the characteristics of our OTT PLS pressure probe for water level measurement. The heart of the probe is the capacitive ceramic pressure cell, which is particularly robust and not easily upset. A significant feature of the PLS is its ability to operate within specification after being frozen in ice. The integrated controller is the brain of the probe: it receives the pressure value measure and uses it to calculate the water level. It naturally takes account of important influences such as temperature or water density and thus guarantees correct values.
The "-L" on a product model indicates that the cable length is specified at the time of order.
Images
Detailed Description
The PLS-L pressure probe is used for precisely measuring the water level of ground and surface waters. The pressure probe uses the hydrostatic pressure of the water column above a relative pressure measuring cell to do so. A pressure
compensation capillary in the pressure probe cable gives the measuring cell the current ambient air pressure as a reference. Erroneous measurement results due to atmospheric air pressure fluctuations are thus eliminated.
Specifications
Water Level
- Measurement range:0-4 m, 0-10 m, 0-20 m, 0-40 m, 0-100m water column
- Pressure sensor (capacitive pressure sensor): ceramic, temperature compensated, overload safe for up to 5 times the measuring range without permanent mechanical damage
- Resolution: (SDI-12) 0.001 m; 0.1 cm; 0.01 ft; 0.1 mbar; 0.001 psi
- Accuracy: SDI-12 ≤ ±0.05 % FS (linearity and hysteresis) 4 … 20 mA ≤ ±0.1 % FS (linearity and hysteresis) 10 ppm/°C at 20 °C
- Temperature compensated working range: – 5 °C to +45 °C (ice-free)
- Temperature measurement range: –25 °C ... +70 °C (ice-free)
- Temperature sensor NTC:
- Resolution: 0.1 °C / 0.1 °F
- Accuracy: ±0.5 °C / ±0.9 °F
- Available interfaces: 4 ... 20 mA, SDI-12, RS485 (via SDI-12 protocol)
- Supply voltage: +9.6 ... +28 V DC, typically 12/24 V DC
- Power consumption: (SDI-12) sleep < 600 µA active < 3,6 mA
Dimensions and Weight
- Dimensions: L x Ø 195 mm x 22 mm
- Weight: approx. 0.3 kg
Environmental Conditions
- Operating temperature: – 25 ... +70 °C
- Storage temperature – 40 ... +85 °C
- Protection type: IP 68
- Mechanical Strength: meets the mechanical shock tests of IEC 68-2-32 EMC limits CE conformity; EN 61000-4-2/3/4/5/6 and EN 61000-6-3 Class B are adhered to
Compatibility
Desiccant Filter
The PLS-L is meant to be used with the C1420 desiccant filled vent filter, which is used to keep moisture out of the vent tube.
Datalogger Considerations
Compatible Contemporary Dataloggers
| CR200(X) Series | CR800/CR850 | CR1000 | CR1000X | CR3000 | CR5000 | CR7X | CR9000X |
 |
|
|
|
|
|
Compatible Retired Dataloggers
| CR500 | CR510 | CR10 | CR10X | 21X | CR23X | CR9000 |
|
|
|
|