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SDI-PT Submersible Pressure Transducer

Submersible pressure transducer for water quantity monitoring by FTS.
FTS' submersible pressure transducer provides reliable, accurate pressure and temperature measurements.

The digital (SDI-12) transducer consists of a piezoresistive sensor and a temperature sensor housed in a 316L stainless-steel case that can be submerged in most canals, wells, ponds, harbors, lakes, streams and tanks. An NTP fitting allows the SDI-PT to be used in closed-pipe applications.

It's fitted with a rugged Hytrel cable that remains flexible, even under harsh environmental conditions. The cable incorporates a vent tube to compensate for atmospheric pressure fluctuations. The vent tube terminates inside a desiccant tube, which prevents water vapor from entering the inner cavity of the transducer.
  • SDI-12 output suitable for use with any dataloggers that employ the SDI-12 standard, like the Axiom.
  • Static accuracy of ±0.1% FS over a 0° to 60°C temperature range.
  • Rugged stainless steel case that protects piezoresistive sensor.
  • Fully temperature compensated.
  • 24-bit A/D.
  • Simultaneous 50/60 Hz rejection.
  • Low power sleep state between measurements that reduces power consumption.
Power requirements:
6 to 18 VDC
Power consumption:
    Standby:
< 80 µA
    Operating:
8 mA (1-second measurement) (40 mA maximum)
Measurement time:
<1.5 seconds
Outputs:
SDI-12 (version 1.3) 1,200 baud
Measurement ranges:
(range option is selected for each unit at time of purchase)
Table Caption

Pressure (psig)

Pressure (kPa)

Feet of fresh water
0 to 2.9
0 to 20
0 to 6.7
0 to 7.25
0 to 50
0 to 16.7
0 to 14.5
0 to 100
0 to 33.4
0 to 29
0 to 200
0 to 67
0 to 72.5
0 to 500
0 to 167
0 to 145
0 to 1000
0 to 334.5
Accuracy:
±0.1% FS TEB*
Resolution:
0.0035% FS
Overpressure:
2 x pressure range
Operating temperature:
-10°C to 80°C
Compensated temperature:
0°C to 60°C
Temperature accuracy:
±0.2°C
Maximum cable length:
~1,500ft (457m) for one sensor connected to a single SDI port
Cable type:
5 conductor, 26 AWG, Hytrel jacket
Material:
    Top cone:
Delrin
    Body:
316L stainless steel
Dimensions:
    Length:
8.4" (21.34cm)
    Diameter:
0.84" (2.13cm)
Weight (no cable):
0.40 lbs (0.18 kg)
* Total ERROR Band (TEB) includes the combined errors due to nonlinearity, hysteresis, nonrepeatability, and thermal effects over the compensated temperature range, per ISA S51.1.