PASCO PS-2194 Ethanol Sensor - Manual

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I n s tr u c t i o n S he e t
0 1 2 - 1 0 2 8 7B
Ethanol Sensor
PS-2194
Included Parts
1. Amplifier
2. Probe
3. PTFE tape for membrane replacement (not pictured)
Additional Part Required
• PASPORT interface or datalogger
Related Parts
• Replacement probe (PASCO part 003-10338)
• Additional PTFE tape (720-062)
Quick Start
1. Connect the amplifier to your PASPORT interface.
2. Connect the probe to the amplifier.
3. If you are using a computer, connect the PASPORT interface
to it and start DataStudio.
4. Ensure that the membrane is installed and intact. There
should be no tears or discoloration.
5. Place the end of the probe in the gas above a solution con-
taining less than 3% ethanol.
6. Press or click the start button to begin recording data.
The probe stabilizes after about 10 minutes of warm up time.
Introduction
The Ethanol Sensor measures the concentration of ethanol in a
gas or indirectly in a liquid. The sensor’s probe contains a mate-
rial whose resistance decreases in the presence of ethanol. The
sensor translates this resistance into an ethanol concentration
measurement, which is recorded and displayed by the connected
computer or datalogger. The Ethanol Sensor is well-suited for
continuous recording and discrete measurements.
Precautions
• Do not expose the probe to gas containing more than 3%
ethanol, including the gas above alcoholic beverages.
Higher ethanol concentrations will deplete the sensing ele-
ment. Note that the gas above a liquid contains about the
same concentration of ethanol as the liquid itself.
• Ensure that the membrane is installed and intact before
using the probe. The membrane prevents the sensing element
from getting wet. If the sensing element accidentally gets
wet, rinse and dry it quickly. Note that the probe may be
degraded or destroyed.
• Do not immerse the probe. The membrane (if it is in good
condition) will protect the probe in case of accidental immer-
sion. However, the probe is designed for use in gas only.
Connecting the Parts
1. Plug the amplifier’s PASPORT connector into any port of a
PASPORT interface or datalogger.
2. Connect the probe to the amplifier.
Connecting the probe and interface
3. If you are using a computer, connect the PASPORT interface
to it and start DataStudio.
1
2
to PASPORT
interface
probe