Description
Seametrics PT12-BV Barometric and Vacuum Sensor comes as a weatherproof stand-alone box or with an automatic compensation wiring option. The PT12-BV measures pressure, temperature, and supply voltage.
The weatherproof box is an ideal barometric reference for absolute pressure sensors. This version features both an SDI-12 interface and a Modbus® RTU interface that makes the product easy to connect to recorders and operates on low power. This makes it a preferred choice for many environmental professionals with existing SDI-12 or Modbus® RTU systems.
Seametrics PT12-BV Feature
- Weatherproof box
- Automatic barometric compensator
- SDI-12 v1.3 interface and/or Modbus® RTU interface (Depends on version)
- Pressure/vacuum and temperature
- Polyethylene, polyurethane, and ETFE cable options
With the Compensation Wiring Option, the PT12-BV automatically provides barometric compensation for a single attached absolute PT12 submersible pressure sensor. No post-processing of data. No need to use a vented cable or worry about maintaining desiccant tubes. This version features an SDI-12 communication interface, making it ideal for many existing environmental systems.
Application
- Barometrically compensate for absolute pressure sensors for level measurement
- Measure vacuum pressure during vapor extraction pilot testing
- Supplement aquifer test data in leaky or confined conditions
- Measure accurate barometric pressure
Seametrics PT12-BV Specification
| Housing | Material | Weatherproof box – ABS – IP66/67 | ||
| Dimensions | Box only: 4.3” x 3.1” x 2.5” (10.9 x 7.9 x 6.4 cm) | |||
| Wire Seal Material | Fluorocarbon and Buna N | |||
| Communication Pigtail | 5 ft (1.5 m) polyurethane cable | |||
| Options | PT12-BV compensation wiring option; Bulkhead connector | |||
| Temperature | Operating Range | Recommended: -15 ? to 55 ?C (5 ? to 131 ?F) Not designed to operate under water | ||
| 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 ?A | |||
| 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 on board | Silicon strain gauge transducer, 316 stainless | ||
| 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) | ||
| Range | -15 ? to 55 ?C (5 ? to 131 ?F) | 0-16 psia (110 kpa) | ||
| Compensated | — | 0 ? to 40 ?C (32 ? to 104 ?F) | ||
| Over pressure protection | 2x | |||
| Environmental | IP66/67 | |||
*Specifications subject to change. Please consult out a web site for the most current data (seametrics.com). Modbus is a registered trademark of Schneider Electric.
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