The SDS-10 hydrostatic probe is designed for continuous measurement of the medium level in tanks, pumping stations, channels, and other locations with high sedimentation. The liquid level transmitter is based on the principle that the measured static pressure of the liquid is proportional to the height of the liquid in the tank.
The product uses the piezoresistive effect of sensitive ceramic elements to convert static pressure into an electrical signal, which is transmitted to a dedicated digital circuit for amplification, linear compensation, interference suppression, surge protection, and other signal processing. The result is a signal with the parameters of a standard industrial signal, such as 4–20 mA, 0–10 V, etc.
The standardized electrical signal provides accurate information about the medium level in the tank, which is used to read parameters and/or control levels, such as switching pumps, gates, sluice gates, etc. on or off.
Applications: Chemical plants, wastewater treatment plants, various acidic liquids and gases other than hydrofluoric acid, dams, rivers, and other locations with large amounts of sediment.
Features:
- Significantly greater measurement accuracy and adjustment capabilities compared with other measurement methods, such as conductivity probes or float switches,
- A wide measurement range for tank depth and liquid level (0–10 m H2O), as well as resistance to temperature changes (-20°C–+80°C).
- No moving parts, such as the bending cable in float switches, which may cause the float to become stuck or be damaged through wear,
- Significantly lower susceptibility to clogging or coating with adhesive and solid wastewater fractions than conductivity probes,
- Stable operating conditions resulting from the need for continuous immersion of the probe in the medium,
- Easy installation at a low level; the probe hangs from its own cable just a few centimeters above the bottom,
- High resistance to the variable and aggressive wastewater environment; in ordinary float switches, cables become brittle, stiff, and damaged over time, while conductivity probes become covered with contaminants or deposits and lose their conductivity properties,
- The levels read by the transmitter can be easily modified in controllers; with conductivity probes and float switches, it is necessary to interfere with their installation in the tank.
- Warranty and post-warranty service
- 24-month warranty
Technical data:
- Measurement range: 0–10 m H2O (meters of water column),
- Power supply: 10–30 V DC,
- Output signal: 4–20 mA and RS485
- Liquid temperature: -20°C–+80°C,
- Temperature compensation: 0°C–+50°C,
- Diaphragm material: AL2O3 ceramic,
- Overload: 300%,
- Housing material: 316 L stainless steel,
- Accuracy: 0.1% FS (FS – full scale),
- Cable length: 10 meters.
- Resistance (Ω):
- Current (2 wires): ≤ (supply voltage – 8 V) / 0.02 A
- Voltage (3 wires): > Maximum output signal / 1 mA
- Proportional voltage (3 wires) > 10 K
- Maximum current consumption:
- Current (2 wires): maximum 25 mA,
- Voltage (3 wires): 2.5 mA,
- Proportional voltage (3 wires): 2.5 mA.
- Response to changes:
- Initial setting after connection: ~100 ms
- Response time: 10 ms
- Polling: 1 min
- Vibration resistance: 10 g (IEC 60068-2-6 standard, under resonance conditions)
- Shock resistance: 500 g (IEC 60068-2-27 standard, mechanical shocks)
- Service life: 1 million pressure measurement cycles.
- Lightning protection: compliant with IEC 61000-4-5 / Level 4 standards
