3B Scientific Absolute Pressure Sensor, 2500 hPa - Manual

3B SCIENTIFIC ® PHYSICS
1
Absolute Pressure Sensor U11320
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 1000 kPa.
• 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
The absolute pressure sensor with its extensive
measurement range is particularly suitable for
experiments to demonstrate Boyle’s law and for
measuring the piston pressure (PV diagram) in a
Stirling engine. In addition, the absolute pressure
sensor can also be used to record and measure the
production of oxygen during photosynthesis and
for transpiration experiments in a closed system.
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 via the
interface.
3. Equipment supplied
1 Sensor box
1 8-pin mini DIN connection lead, length: 60 cm
1 Silicone tube, inner dia.: 2 mm, length: 1 m
1 Plastic syringe 20ml
4. Technical data
Measurement range: 0 to 250 kPa
Sensor type: Semiconductor sensor
Accuracy: ±1%
Resolution: 0.1 Pa
Connections: Serrated nozzle 4.8 mm dia.
5. Operation
• Use the full length of the silicone tube or shor-
ten it to the length desired.
• Use the silicone tube to connect the pressure
source to the nozzle of the sensor.
• During the experiment, the elasticity of the
tube should be taken into account – this could
possibly lead to an error in readings.