Seametrics PT2X-BV Barometric and Vacum Sensor With Datalogging

Seametrics PT2X-BV Barometric and Vacum Sensor With Datalogging

The Seametrics PT2X-BV is a special version of the PT2X designed to measure barometric and vacuum pressure in reference to absolute pressure, along with temperature and time. It will measure pressure/vacuum from 600 to 1100 millibars.

Pressure measurement is accomplished utilizing an extremely rugged and stable 15 PSIA piezo-electric media-isolated pressure element combined with a 16-bit analog-to-digital converter.

This provides extremely accurate and stable pressure input into the microprocessor on the circuit board that measures the pressure, stores the data in non-volatile memory, and communicates the information via a serial communication link (RS485) to the host computer.

Temperature measurement is accomplished by utilizing a temperature sensor chip. The PT2X-BV is available in two enclosures – either an ABS weather-proof box or a stainless steel tube. The tube version is available with either a solid end cone or an NPT end cone for connecting to piping.

The PT2X-BV can be networked with other Seametrics Smart Sensors and controlled directly from a single computer. While most will use the PT2X-BV with our 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.

Another Article:


  • Measures & records barometric pressure/vacuum 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, newly upgraded Aqua4Plus 2.0 software


  • Barometrically compensate absolute sensors for level measurement
  • Measure vacuum pressure during vapor extraction pilot testing
  • Supplement aquifer test data in leaky or confined conditions


Box EnclosureBody MaterialABS - IP66/67
 DimensionsBox: 4.3” x 3.1” x 2.5” (10.9 x 7.9 x 6.4 cm)
Box and connectors: 4.3” x 3.6” x 2.5” (10.9 x 9.1 x 6.4 cm)
 Wire Seal MaterialFluoropolymer and Buna N
Tube & CableBody MaterialAcetal & 316 stainless or titanium
 Storage RangeWithout batteries: -40 ̊ to 80 ̊C (-40 ̊ to 176 ̊F)
 DimensionsCabled: 12.18” x 0.75” diameter (30.9 cm x 1.9 cm)
Cableless: 11.93” x 0.75” diameter (30.3 cm x 1.9 cm)
 Wire Seal MaterialFluoropolymer and PTFE
 Weight0.8 lb. (0.4 kg)
 CableSubmersible: polyurethane, polyethylene, or ETFE (4 lb./100 ft., 1.8 kg/30 m)
 EnvironmentalIP68, NEMA 6P
 Field ConnectorStandard
TemperatureOperating RangeRecommended: -15 ̊ to 55 ̊C (5 ̊ to 131 ̊F)
 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 do 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-40 ̊ to 80 ̊C (-40 ̊ to 176 ̊F)600 to 1100 millibars
 Compensated---0 ̊ to 40 ̊C (32 ̊ to 104 ̊F)
Max operating pressure1.1 x full scale
Burst pressure2.0 x full scale

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