General Information
Seametrics PT2X-BV Barometric and Vacum Sensor With Datalogging 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.
Seametrics PT2X-BV Feature
- 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
Applications
- Barometrically compensate absolute sensors for level measurement
- Measure vacuum pressure during vapor extraction pilot testing
- Supplement aquifer test data in leaky or confined conditions
Seametrics PT2X-BV Specifications
| Box Enclosure | Body Material | ABS – IP66/67 | |
| Dimensions | Box: 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 Material | Fluoropolymer and Buna N | ||
| Tube & Cable | Body Material | Acetal & 316 stainless or titanium | |
| Storage Range | Without batteries: -40 ? to 80 ?C (-40 ? to 176 ?F) | ||
| Dimensions | Cabled: 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 Material | Fluoropolymer and PTFE | ||
| Weight | 0.8 lb. (0.4 kg) | ||
| Cable | Submersible: polyurethane, polyethylene, or ETFE (4 lb./100 ft., 1.8 kg/30 m) | ||
| Environmental | IP68, NEMA 6P | ||
| Field Connector | Standard | ||
| Temperature | Operating Range | Recommended: -15 ? to 55 ?C (5 ? to 131 ?F) | |
| 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 do 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, FtH?O, inH?O, mmH?O, mH?O, inH?O, 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 pressure | 1.1 x full scale | ||
| Burst pressure | 2.0 x full scale | ||
*Specifications subject to change. Please consult our website for the most current data (seametrics.com). Modbus is a registered trademark of Schneider Electric.
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