Seametrics PT12 Pressure & Temperature with Modbus & SDI-12 Interface

seametrics pt12 pressure and temperature sensorFeatures

  • Modbus® RTU (RS485) and SDI-12 v1.3 interfaces
  • Small diameter — 0.75” (1.9 cm)
  • Pressure and temperature
  • 316 stainless steel, fluoropolymer, and PTFE construction (titanium optional)
  • Polyethylene, polyurethane, and ETFE cable options
  • End code interchangeable with a 1/4” NPT inlet
  • Specification per OSW Technical Memo 96.05 is an option on the 15 PSIG (10.5 mH₂O) and 30 PSIG (21 mH₂O) units

The Seametrics PT12 Pressure/Temperature Sensor has been designed to provide trouble-free submersible operation in liquid environments. This sensor communicates via SDI-12 (v1.3) or Modbus® RTU (RS485)protocol.

Pressure/level is measured with an extremely rugged and stable piezo-electric, media isolated pressure element and compensated for temperature using our proprietary calibration methodology. Temperature is measured using an on-board digital chip.

Seametrics also carries a special version of the PT12 designed to measure barometric pressure in reference to absolute pressure. If you are using an absolute PT12, contact your representative for details on how our PT12-BV can facilitate obtaining barometrically compensated pressure/level.

Application

  • Rugged construction can replace analog sensors
  • Monitor groundwater, well, tank, and tidal levels
  • Pump testing
  • Flow monitoring

Another Article:

Specification

Housing & Cable Weight 0.8 lb. (0.4 kg)
Body Material 316 stainless or titanium
Wire Seal Material Fluoropolymer and PTFE
Cable Submersible: polyurethane, polyethylene, or ETFE; 4 lb./100 ft., 1.8 kg/30 m; 2000 ft max for Modbus®
Desiccant 1-3 mm indicating silica gel
Field Connector Available as an option
Temperature Operating Range Recommended: -15 ̊ to 55 ̊C (5 ̊ to 131 ̊F) Requires freeze protection kit if using pressure option in the water below freezing.
Storage Range -40 ̊ to 80 ̊C (-40 ̊ to 176 ̊F)
Power Voltage 9-16Vdc, 24Vdc over voltage protection, electromagnetic & transient protection IEC-61000 – 4-3, 4-4, 4-5, 4-6
Supply Current Active 3mA average/ 10mA peak; sleep 150 μA
Communication Modbus® RS485 Modbus® RTU, output=32bit IEEE floating point
SDI-12 SDI-12 (ver. 1.3) – ASCII
Output Channels Temperature Depth/Level
Element Digital IC onboard Silicon strain gauge transducer, 316 stainless or Hastelloy
Accuracy ±0.5°C — 0° to 55°C (32 ̊ to 131 ̊F)
±2.0°C — below 0°C (32 ̊F)
±0.05% FSO (typical, static)
±0.1% FSO (maximum, static)
(B.F.S.L. 20 ̊C)
Resolution 0.06 ̊C 0.0034% FS (typical)
Units Celsius, Fahrenheit, Kelvin PSI, FtH₂O, inH₂O, mmH₂O, mH₂O, inH₂O, cmHg, mmHg, Bars, Bars, kPa
Range -15 ̊ to 55 ̊C (5 ̊ to 131 ̊F) Gauge PSI: 1², 5, 7, 15, 30, 50, 100, 300
FtH₂O: 2.3², 12, 35, 69, 115, 231, 692
mH₂O: 0.7², 3.5, 5, 10.5, 21, 35, 70, 210
Absolute² PSI: 30, 50, 100, 300
FtH₂O: 35, 81, 196, 658
mH₂O: 10, 24, 59, 200
Compensated 0 ̊ to 40 ̊C (32 ̊ to 104 ̊F)
Max operating pressure 1.1 x full scale
Overpressure protection 3x full scale up to 300psi – for > 300psi (650 ft or 200 m) contact factory
Burst pressure 1000 psi (approx. 2000 ft or 600 m)
Environmental IP68, NEMA 6P

*Specifications subject to change. Please consult our web site for the most current data (seametrics.com). Modbus is a registered trademark of Schneider Electric.
1 Higher pressure ranges available upon request
2 ±0.25% accuracy FSO (max) at this range
3 The depth range for absolute sensors has 14.7 PSI subtracted to give actual depth allowed.

For further information please contact : marketing@wmablog.com

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