3B Scientific Barometer - Manual

3B SCIENTIFIC ® PHYSICS
1
Barometer U11325
Instruction Sheet
10/08 Hh
1. Safety instructions
• To avoid permanent damage to the built-in
semiconductor sensor, never exceed the maxi-
mum threshold pressure of 400 kPa or 4 bars.
• Suitable only for non-corrosive gases such as
air, helium and nitrogen.
• Do not allow the sensor element to come into
contact with water.
2. Description
This absolute pressure sensor with an extensive
measurement range is particularly suitable for
measuring atmospheric pressure during meteoro-
logical observations and for any other experiments
dealing with atmospheric pressure. The barometer
can also be used as an altimeter in mountain
climbing.
Two-port measurement procedure for the pressure
sensor: nozzle 1 is connected to the external pres-
sure via a connecting nipple, and nozzle 2 is con-
nected to a sealed reference vacuum.
The sensor box is automatically recognised by the
interface.
3. Equipment supplied
1 Sensor box
1 8-pin mini DIN connection lead, length: 60 cm
4. Technical data
Measurement range: 70 to 120 kPa
700 to 1200 mbars
Sensor type: Semiconductor sensor
Accuracy: ±1.5%
Resolution: 0.1 mbar
Connections: Serrated nozzle 4.8 mm dia.
5. Operation
• Place the sensor box in the surroundings where
the experiment is to be conducted (e.g. inside a
building, weather-protected area outdoors).
• If necessary, connect the sensor to a pressure
source with a piece of the silicone tube from
U10145.