Seametrics PT12-BV Barometric and Vacuum Sensor

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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