Seametrics PT2X Pressure & Temperature with Datalogging

[caption id="attachment_35108" align="aligncenter" width="217"]Seametrics PT2X Pressure and temperature sensor Seametrics PT2X Pressure and temperature sensor[/caption]

The Seametrics PT2X Smart Sensor 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.


  • 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


Dimension Seametrics PT2XPressure and temperature sensor

Housing & CableWeight0.8 lb. (0.4 kg)
 Body MaterialAcetal & 316 stainless or titanium
 Wire Seal MaterialFluoropolymer and PTFE
 CableSubmersible: polyurethane, polyethylene, or ETFE (4 lb./100 ft., 1.8 kg/30 m)
 Desiccant1-3 mm indicating silica gel
 Field ConnectorStandard
TemperatureOperating RangeRecommended: -15 ̊ to 55 ̊C (5 ̊ to 131 ̊F) Requires freeze protection kit if using pressure option in the water below freezing.
 Storage RangeWithout batteries: -40 ̊ to 80 ̊C (-40 ̊ to 176 ̊F)
PowerInternal BatteryTwo replaceable lithium ‘AA’ batteries - Battery life: 18 months at 15 min. polling interval (may vary due to environmental factors)
 Auxiliary12 Vdc - Nominal, 9-15 Vdc - range
CommunicationModbus®RS485 Modbus® RTU, output=32bit IEEE floating point
 SDI-12SDI-12 (ver. 1.3) - ASCII
LoggingMemory4MB - 520,000 records
 Logging TypesVariable, user-defined, profiled
 Logging Rates8x/sec maximum, no minimum
 Baud Rates9600, 19200, 38400
 SoftwareComplimentary Aqua4Plus 2.0
 Networking32 available addresses per junction (Address range: 1 to 255)
 File Formats.a4d and .csv
Output Channels TemperatureDepth/Level
 ElementDigital IC onboardSilicon 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)
 Resolution0.1 ̊C0.0034% FS (typical)
 UnitsCelsius, Fahrenheit, KelvinPSI, FtH₂O, inH₂O, mmH₂O, mH₂O, inH₂O, cmHg, mmHg, Bars, Bars, kPa
 Range-15 ̊ to 55 ̊C (5 ̊ to 131 ̊F)GaugePSI: 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
 Absolute²PSI: 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 pressure1.1 x full scale
Overpressure protection3x full scale up to 300psi
Burst pressure1000 psi (approx. 2000 ft or 600 m)
EnvironmentalIP68, 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.