Seametrics PT2X Pressure & Temperature with Datalogging


Seametrics PT2X Pressure & Temperature with Datalogging is an integrated data logger and pressure/temperature sensor and is ideal for monitoring groundwater, well, tank, and tidal levels, as well as for pump and slug testing. This sensor networks with all of the Seametrics Smart Sensor family.

This industry-standard digital RS485 interface device records up to 520,000 records of pressure/level, temperature, and time data, operates with low power, and features easy-to-use software with powerful features. Constructed with 316 stainless steel or titanium, PTFE, and fluoropolymer, this sensor provides high-accuracy readings in rugged and corrosive field conditions.

Two replaceable internal AA batteries power the PT2X. (Auxiliary power supplies are available for data-intensive applications.) The unit is programmed using Seametrics’ easy-to-use Aqua4Plus 2.0 control software. Once programmed the unit will measure and collect data on a variety of time intervals. Several PT2Xs, or a combination of PT2Xs and other Seametrics Smart Sensors, can be networked together and controlled directly from a single computer.

While most will use the PT2X with our free, easy-to-use Aqua4Plus 2.0 software, it is by no means limited to that software. You can use your own Modbus® RTU or SDI-12 software or logging equipment to read measurements, thus tying into your existing telemetry and control systems.

Seametrics PT2X Feature

  • Measures & records pressure/level and temperature
  • Low power
  • Modbus® RTU (RS485) and SDI-12
  • ±0.05% FSO typical accuracy
  • Thermally compensated
  • Small diameter — 0.75” (1.9 cm)
  • 520,000 records in non-volatile memory
  • Barometric compensation utility for use with absolute sensors
  • Free, easy-to-use Aqua4Plus 2.0 software


  • Pump and slug tests
  • Stormwater runoff monitoring
  • Well, tank, tidal levels
  • River, stream, reservoir gauging
  • Wetland monitoring
  • Resource administration

Seametrics PT2X Specifications

Dimension Seametrics PT2XPressure and temperature sensor
Dimension Seametrics PT2XPressure and temperature sensor


Housing & Cable Weight 0.8 lb. (0.4 kg)
Body Material Acetal & 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)
Desiccant 1-3 mm indicating silica gel
Field Connector Standard
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 Without batteries: -40 ̊ to 80 ̊C (-40 ̊ to 176 ̊F)
Power Internal Battery Two replaceable lithium ‘AA’ batteries – Battery life: 18 months at 15 min. polling interval (may vary due to environmental factors)
Auxiliary 12 Vdc – Nominal, 9-15 Vdc – range
Communication Modbus® RS485 Modbus® RTU, output=32bit IEEE floating point
SDI-12 SDI-12 (ver. 1.3) – ASCII
Logging Memory 4MB – 520,000 records
Logging Types Variable, user-defined, profiled
Logging Rates 8x/sec maximum, no minimum
Baud Rates 9600, 19200, 38400
Software Complimentary Aqua4Plus 2.0
Networking 32 available addresses per junction (Address range: 1 to 255)
File Formats .a4d and .csv
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) ±0.05% FSO (typical, static)
±2.0°C — below 0°C (32 ̊F) ±0.1% FSO (maximum, static)
(B.F.S.L. 20 ̊C)
Resolution 0.1 ̊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: 1¹, 5, 7, 15, 30, 50, 100, 300
FtH₂O: 2.31, 12, 35, 69, 115, 231, 692
mH₂O: 0.71, 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
Burst pressure 1000 psi (approx. 2000 ft or 600 m)
Environmental IP68, NEMA 6P

*Specifications subject to change. Please consult our website for the most current data. Modbus is a registered trademark of Schneider Electric.

  1.  ±0.25% accuracy FSO (max) at this range
  2. The depth range for absolute sensors has 14.7 PSI subtracted to give actual depth allowed.


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Rudy Wiratama

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