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Dissolved Oxygen Meter for Winemaking
Hanna Instruments: HI 9143W
Dissolved oxygen (DO) is a term commonly used
for the measurement
of the amount of free molecular oxygen
(O2) dissolved in a unit
volume of a solution usually expressed in
milligrams per liter (mg/l),
parts per million (ppm) or percent saturation.
Why measure for Dissolved Oxygen in wine?
There are several stages where it is important
to measure for Dissolved Oxygen:
- Test for the level of oxygen during
racking and tank movements. Whether its reduced or alternatively
oxidized, the taste of wine can be dramatically altered by oxygen.
- Test for oxygen pickup during pad, DE
and cross flow filtrations. DO monitoring insures consistent process
control and operation of equipment.
- Monitor micro ox treatment during
maturation process. Plotting the dissolved oxygen present during
treatment aids in timely and effective micro ox implementations.
- Test the tank for the amount of oxygen
after processing and before bottling. The concentration of molecular
oxygen should be measured in the wine before bottling and should be less
than 0.5 mg/l. If the concentration of dissolved oxygen is greater
than 0.5 mg/l, it can generally be lowered by sparaging with nitrogen gas
(see Zoecklein, et. al., 1995).
- Test oxygen in bottled wine.
During bottling, oxygen must be monitored regularly to insure minimal
impact on wine quality during final filtration and filler/corker
operations.
 HI
9143W Dissolved Oxygen Meter can
measure DO in bottled wine as well as in storage tanks. This meter
automatically compensates for effects such as temperature, altitude, humidity
and salinity. These conditions can all impact the accuracy of DO readings
and must be accounted for. The meter also features a special probe
designed for wine bottle testing. All meters come with a two year warranty
from Hanna Instruments.
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Specifications |
HI 9143W |
HI 9142W |
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Range |
O2: 0.00-45.00mg/l |
0.0 to 19.9 mg/l |
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Sat: 0-300%, 0.0-50.0ºC |
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Resolution |
O2: 0.01 mg/l; 0.1% Sat |
0.1 mg/l |
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0.1º C |
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Accuracy (@20C/68F) |
O2 or Sat: 1.5% FS; 0.5ºC |
1.5% FS |
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Calibration |
Automatic in air @ 100% |
Manual: 1 or 2 pts (zero & slope) |
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Temp. Compensation |
Automatic , 0-50ºC |
Automatic , 0-30ºC |
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Altitude Compensation |
0-1900mm; 100m resolution |
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Salinity Compensation |
0 to 40 g/l, 1 g/l resolution |
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Probe |
HI 76408 wine spot check probe with 3.3ft cable included |
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Battery type |
(4) 1.5V AA, or 12VDC |
(4) 1.5V AA |
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Battery Life |
200 hours continuous |
500 hours continuous |
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Environment |
0-50ºC; 100% max RH |
0-50ºC; 100% max RH |
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Dimensions/ Weight |
7.7 x 3.1 x 2.4" / 1.1# |
7.7 x 3.1 x 2.4" / 1.1# |
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Included extras: |
carrying case, membranes |
carrying case, membranes |
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electrolyte refilling solution |
electrolyte refilling solution |
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Recommended Accessories |
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HI 7040M |
Zero oxygen solution |
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