e-Bar internal barometer option for Evolution datalogger

Manufacturer: Nesa
Category: Meteorology – Climatology, Pressure, Atmospheric pressure, SENSORS

The NESA e-Bar is an internal barometer (atmospheric pressure sensor) option for the Evolution datalogger, featuring a piezoresistive bridge transducer. Typical measurement range is 500–1100 hPa (programmable), and accuracy is <0.4 hPa @ 20°C.

Because it's mounted on the datalogger's internal electronics, it doesn't use the datalogger's physical channels. It's only available as an option when ordered with the Evolution datalogger.

Key points

Typical measurement range 500 ÷ 1100 hPa (programmable), sensitivity 0.05 hPa
Resolution <0.15 hPa @ 20°C, accuracy <0.4 hPa @ 20°C, calibration uncertainty <0.15 hPa, response time < 2 s
Automatic temperature compensation -10°C ÷ +70°C; I2CBus or SDI12 interface directly to the datalogger's µP
Output signal linearly proportional to the measured atmospheric pressure
Range and correction configurable from the datalogger
10.5÷24Vdc, <0.01W and <0.5 mA, -40 ÷ +70°C
It is only activated at the factory (requires calibration) and during the manufacturing of the datalogger
Compliant with CE standards

Technical Frequently Asked Questions

Can the e-Bar be ordered separately?

No. It is only offered as an option in conjunction with the Evolution datalogger.

Does it use up datalogger channels?

No. Because it is mounted on the internal electronics of the datalogger, it does not use the datalogger's physical channels, which maintain their ability to connect to external sensors.

What is its fuel consumption?

The technical data table gives 10.5–24 Vdc and <0.01 W, and the manufacturer's text states <0.5 mA. This does not alter the datalogger's power consumption.

Can it be activated after the datalogger has been manufactured?

No. It is only activated at the factory (requires calibration) and during the manufacturing of the datalogger.

What interface does it use?

I2CBus or SDI12 directly to the datalogger's µP.

What can be configured?

The range and correction, from the datalogger.

What applications is it suitable for?

Meteorology; tunnels and highways; climatology; sports and winter resorts; construction site safety; industrial buildings.

How do I order it?

Sensor: Evolution; accessory: e-Bar. Manufacturer example: Evolution e-bar.

Properties

Feature	Specification
Measurement and operating principle
Measured magnitude	Atmospheric pressure
Typical measurement range	500 ÷ 1100 hPa (programmable)
Measurement principle	piezoresistive bridge transducer
Transducer type	Piezoresistive
Sensitivity	0.05 hPa
Resolution	<0.15 hPa @ 20°C
Precision	<0.4 hPa @ 20°C
Calibration uncertainty	<0.15 hPa
Response time	< 2 s
Temperature response	Self-compensation -10°C ÷ +70°C
Regulatory compliance	EC
Output signals and interface
Exit sign	Linearly proportional to the measured atmospheric pressure
Interface signal	I2CBus or SDI12 directly to the datalogger's µP
Configurable parameters	Range and correction, from the datalogger
Datalogger channels	It does not use physical datalogger channels.
Integration	Activatable option on the Evolution datalogger, mounted on its internal electronics
Analog inputs of the datalogger	It does not reduce their number, as it is an integrated device.
Activation	Only at the factory (requires calibration) and during the manufacturing of the datalogger; it is not possible to activate it afterward
Power supply, environment and calibration
Food and consumption	10.5÷24Vdc, <0.01W
Current consumption	<0.5 mA
Operating conditions	-40 to +70°C
Work environment	Inside the datalogger (controlled environment)
Envelope	Inside the ventilated datalogger box
Calibration	Each instrument is calibrated and verified with a pressure generator/regulator connected to a primary gauge
Typical applications
Application	Meteorology
Application	Tunnels, highways
Application	Climatology
Application	Sports and winter resorts
Application	Safety at construction sites
Application	Industrial buildings

Reference	Configuration
e-BareBar	Supply: Electronic barometer inside the Evolution datalogger; programmable range, standard 500-1100 hPa; read directly by the datalogger as it is mounted on the motherboard