• Capteur de pression submersible SDI-12

Capteur de pression submersible SDI-12

The KPSI 500 submersible hydrostatic level transducer represents the leading edge of level sensing technology available today.

Incorporating a highly stable media-isolated sensor, the KPSI 500 features SDI-12 and RS-485 serial-digital interface standards. SDI-12 is a commonly used standard for interfacing data recorders with microprocessor-based sensors, in the environmental monitoring field. The KPSI 500 is an excellent solution for applications with requirements that require minimal current drain. It will accommodate cable lengths between sensor and recorder up to 1000 feet.


  • SDI-12 Submersible Level Transducer
  • ±0.05% FS Total Error Band
  • Optional Lifetime Lightning Protection
  • Two year warranty
  • 1” DiameterCustom Polyurethane or ETFE Cable Lengths
  • Welded 316SS or Titanium
  • Custom Level Ranges up to 230 ft. (70m) H2O
  • Shipped with Long-Life Vent Filter
  • Removable Cable Options including PVC jacketed steel armored cable


  • Groundwater Monitoring
  • Down Hole
  • Surface Water Monitoring
  • Tailrace and Forebay Monitoring
  • Oceanographic Research
Full Scale Level Ranges
(intermediate level ranges are available)
10 thru 230 ft. (3 thru 70m) H20 Vented Gage Reference
Proof Pressure 1.5 x FS
Burst Pressure 2.0 x FS
(Combined Errors Due to Nonlinearity, Hysteresis, Non-repeatability, and Thermal Effects over the Compensated Temperature Range)
Level ±0.05% FS TEB For level ranges > 10 ft. (3m) H2O
±0.10% FS TEB For level ranges <= 10 ft. (3m) H2O
Temperature +0.5ºC
Excitation ±0.5 VDC 8 to 28 volts
Resolution +0.0001% FS
Level ±0.0001%FS
Temperature ±0.001ºC
Excitation ±0.1 VDC
Wetted Materials 316 SS or Titanium; POM; FKM; polyurethane or ETFE
Compensated Temp Range 0 to 50ºC
Operating Temp Range -20 to 60 ºC When attached to polyurethane cable
Protection Rating IP 68, NEMA 6P
Excitation 6-28V – VDC output
Input Current 8 mA max Average current during data acquisition
1.0 mA Quiescent
Interface SDI-12, version 1.3
RS-485 SDI-12 protocol
CE compliant EN 61326-1:2013 and 61326-2-3:2013
Approximate Weight 0.75 lbs. (340 g) transducer
0.05 lbs./ft. (79 g/m) cable
Cable Jacket Material Polyurethane
Armored polyurethane (optional 859 accessory) PVC Jacketed steel armored polyurethane
Cable Pull Strength 200 lbs. (90 kg) Polyurethane
Cable Number of Conductors 4
Cable Conductor Size 22 AWG
Cable Seal Molded Polyurethane For polyurethane cable
FKM Gland For ETFE cable
(power supply needs to be limited to 150mA to avoid lock up of the gas tube after a suppression event)
Life Expectancy >1,000 Operations
Peak Clamping Voltage 36 Volts
Response Time  <10 nsecs
Shunts 20,000 Amperes