PBS83M Barometric Pressure Transmitter thumbnail 1

PBS83M Barometric Pressure Transmitter thumbnail 2

PBS83M Barometric Pressure Transmitter thumbnail 3

PBS83M Barometric Pressure Transmitter thumbnail 4

Senseca

PBS83M Barometric Pressure Transmitter

BAROsense barometric pressure transmitter for environmental monitoring.

Measures 300…1100 hPa with a piezoresistive sensor, ±0.5 hPa (700…1100 hPa) @ 20 °C
RS485 Modbus-RTU output, with optional 0/4…20 mA or 0…1/5/10 V analog output and LCD display
Optional T/RH probe input and static port with support bracket, IP 65, meets WMO requirements

Quantity

Overview

The Senseca BAROsense PBS83M series is a barometric pressure transmitter with a high-precision piezoresistive pressure sensor and integrated temperature sensor, measuring 300…1100 hPa. It is factory calibrated in multiple points for excellent time stability and repeatability, and meets WMO requirements. The digital RS485 output with Modbus-RTU or proprietary ASCII protocol links the transmitter to sensor networks over extended distances, with an optional analog output configurable in current (0/4…20 mA) or voltage (0…1 V, 0…5 V or 0…10 V). Units of measurement are user-selectable, and an optional LCD display gives direct reading. Optional inputs for a combined temperature and relative humidity probe let it calculate dew point, absolute humidity and wet bulb temperature, and for outdoor installations an optional static port with support bracket minimises measurement errors caused by wind.

Typical applications

Meteorological applications
Environmental monitoring systems
Altitude applications
Barometric pressure compensation in internal combustion engines
Cleanrooms
Testing of vehicle emissions

Key Feature

High-precision piezoresistive pressure sensor with integrated temperature sensor
Measuring range 300…1100 hPa, configurable for analog output (default 600…1100 hPa)
RS485 output with Modbus-RTU or ASCII proprietary protocol
Optional analog output: 0/4…20 mA or 0…1 V, 0…5 V or 0…10 V, depending on model
User-selectable units of measurement and optional LCD display
Optional combined T/RH probe input, with calculated dew point, absolute humidity and wet bulb temperature
Optional static port with support bracket for outdoor, wind-exposed installations
Factory calibrated in multiple points; IP 65 polycarbonate housing

Benefits

Reliability: factory-calibrated precision and outstanding stability for consistently accurate measurements
According to the standard: meets WMO requirements
Great flexibility: customise outputs and units to meet your measurement needs and integrate with existing systems
Durability: built to withstand diverse environmental conditions, with an optional static port
Wind-resistant: the optional static port minimises errors caused by wind flow in open field measurements

Specifications

BAROMETRIC PRESSURE
Sensor	Piezoresistive
Measuring range	300…1100 hPa Configurable for analog output (default 600…1100 hPa)
Resolution	0.1 for the display 0.01 for the digital output
Accuracy	±0.5 hPa (700…1100 hPa) @ 20 °C ±1 hPa (500…1100 hPa) / ±1.5 hPa (300…500 hPa) @ T = 0…60 °C
Long-term stability	< ±1 hPa/year

RELATIVE HUMIDITY (ONLY WITH EXTERNAL PROBE)
Sensor	Capacitive
Measuring range	0…100 %RH
Resolution	0.1%
Accuracy	±2.5% (0…85%) / ±3.5% (85…100%) @ T = 23 °C
Temperature drift	0.05%/K (0…60 °C)
Sensor operating temperature	-40…+105 °C (R.H. max = [100-2*(T-80)] @ T = 80…105 °C)
Response time	T63 < 4 s (air speed = 2 m/s, without filter)
Long-term stability	< 1%/year (@ 23 °C and 30…70 %RH)

TEMPERATURE (ONLY WITH EXTERNAL PROBE)
Sensor	PTAT integrated in humidity module
Measuring range	-40…+105 °C
Resolution	0.1 °C
Accuracy	±0.2 °C in the range 0…+60 °C ±(0.2 – 0.05 * T) °C in the range T = -40…0 °C ±[0.2 + 0.032 * (T-60)] °C in the range T = +60…+105 °C
Long-term stability	0.05 °C/year
Calculated quantities	Dew point, absolute humidity and wet bulb temperature

GENERAL SPECIFICATIONS
Output	RS485 with Modbus-RTU or ASCII proprietary protocol Optional analog output, selectable in current (0/4…20 mA) or voltage (0…1 V, 0…5 V or 0…10 V, depending on the model)
Power supply	PBS83M0…: 7…30 Vdc PBS83MW…: 8…30 Vdc PBS83MX…: 8…30 Vdc PBS83MY…: 15…30 Vdc
Power consumption	4 mA @ 24 Vdc (+ output current if current output is used)
Connection	Internal screw terminal header / PG7 cable gland for power supply and output Optional M12 connector for the T/RH external probe
Operating conditions	-40…+60 °C (-20…+60 °C with LCD) 0…100 %RH
Compatible media	Air and dry gases
Material	Transmitter: polycarbonate, pressure input in nickel-plated brass Static port (optional): ASA Support bracket (optional): aluminium alloy
Housing dimensions	120 x 80 x 55 mm
Weight	250 g approx. (+ 570 g approx. for static port)
Protection degree	IP 65
Static port mounting	Support bracket suitable for fixing to a Ø 30…50 mm mast

ORDERING CODES	PBS83M [Analog output] [T/RH probe] [LCD]
Additional analog output	0 = no W = 0/4…20 mA or 0…1 V analog output X = 0/4…20 mA or 0…5 V analog output Y = 0/4…20 mA or 0…10 V analog output
T / RH probe	0 = no C = with combined T / RH probe kit
LCD	0 = no L = with LCD display
FIXB001	Static port with support bracket and silicone tube